JorgeB

Yep, mistype.

Requested values tests: stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2048 | 128 | 2047 | 72.4MB/s 4096 | 2048 | 128 | 2040 | 76.8MB/s 4096 | 2048 | 128 | 2032 | 78.3MB/s 4096 | 2048 | 128 | 2024 | 78.9MB/s 4096 | 2048 | 128 | 2016 | 80.0MB/s 4096 | 2048 | 128 | 1984 | 80.0MB/s 4096 | 2048 | 128 | 1960 | 79.8MB/s 4096 | 2048 | 128 | 1952 | 80.0MB/s 4096 | 2048 | 128 | 1920 | 79.8MB/s 4096 | 2048 | 128 | 1856 | 79.8MB/s 4096 | 2048 | 128 | 1792 | 79.8MB/s 4096 | 2048 | 128 | 1728 | 79.8MB/s 4096 | 2048 | 128 | 1664 | 78.5MB/s 4096 | 2048 | 128 | 1536 | 77.7MB/s 4096 | 2048 | 128 | 1280 | 77.5MB/s 4096 | 2048 | 128 | 1024 | 77.1MB/s 78.8 to 80.0MB/s is a single second difference in total time. stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2048 | 128 | 1024 | 77.1MB/s 4096 | 2048 | 64 | 1024 | 77.5MB/s 4096 | 2048 | 32 | 1024 | 77.3MB/s 4096 | 2048 | 16 | 1024 | 79.6MB/s 4096 | 2048 | 8 | 1024 | 79.8MB/s 4096 | 2048 | 4 | 1024 | 80.0MB/s 4096 | 2048 | 1 | 1024 | ? MB/s Although it can be set to 1 in unRAID, it will remain at 4, I believe that is the minimum possible setting.

Script is not patched, don't forget you need to patch the one located in "/boot/config/plugins/preclear.disk".

All my previous tests were done using 2 LSI 9211 (flashed H310), I now did some tests using a SASLP, since it's bandwidth challenged and a parity check will take more time the differences should be more noticeable, also it responds differently to the tunable changes. Only thresh was changed to find the optimal values stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2048 | 128 | 2047 | 72.4MB/s 4096 | 2048 | 128 | 2016 | 80.0MB/s 4096 | 2048 | 128 | 1984 | 80.0MB/s 4096 | 2048 | 128 | 1952 | 80.0MB/s 4096 | 2048 | 128 | 1920 | 79.8MB/s 4096 | 2048 | 128 | 1856 | 79.8MB/s 4096 | 2048 | 128 | 1792 | 79.8MB/s 4096 | 2048 | 128 | 1728 | 79.8MB/s 4096 | 2048 | 128 | 1664 | 78.5MB/s 4096 | 2048 | 128 | 1536 | 77.7MB/s 4096 | 2048 | 128 | 1280 | 77.5MB/s 4096 | 2048 | 128 | 1024 | 77.1MB/s With a sync_window of 2048 there's a big range where it works very well, from ~1728 to ~2016, with an apparent sweet spot from ~1950 to ~2000 ,and like the LSI neither sync_window-1 nor /2 provide the best results. Note also that with nr_requests=8 this controller performs always at optimal speed, making the tresh setting practically irrelevant. Of course if this controller is used with one that responds differently the trick is to find the best values with both together. Using nr_requests=8 with the 2 slowest thresh values: stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2048 | 8 | 2047 | 79.8MB/s 4096 | 2048 | 8 | 1024 | 79.8MB/s Next I'm going to test the SAS2LP, same chipset as your controller, but since I don't have a spare I'll have to use one from a server, so I'll do it as soon as I can, IIRC the results were similar to the SASLP but with much bigger differences.

Exactly, although consistent this test server is good for a rough idea, a longer parity check would be better for fine tuning.

stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2240 | 8 | 1960 | 206.6MB/s stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 4096 | 2048 | 8 | 1984 | 207.9MB/s 4096 | 2048 | 8 | 1968 | 207.9MB/s 4096 | 2048 | 8 | 1952 | 209.3MB/s 4096 | 2048 | 8 | 1920 | 207.9MB/s Note that a check with the same settings sometimes is a second shorter or longer, because it's a very small array it makes a difference of a few MB/s, so when the results are very close they could be practically considered the same, e.g.: Duration: 2 minutes, 32 seconds. Average speed: 210.6 MB/s Duration: 2 minutes, 33 seconds. Average speed: 209.3 MB/s Duration: 2 minutes, 34 seconds. Average speed: 207.9 MB/s So with a sync_window=2048 a sync_thresh from ~1900 to ~1990 gives very similar results.

Here you go: Test | stripes | window | nr_reqs | thresh | Speed ----------------------------------------------------------- 1 | 6400 | 1960 | 8 | 1960 | 177.9MB/s 2 | 6400 | 1968 | 8 | 1960 | 205.2MB/s 3 | 6400 | 2240 | 8 | 1960 | 206.6MB/s 4 | 6400 | 2614 | 8 | 1960 | 203.9MB/s 5 | 6400 | 3920 | 8 | 1960 | 203.9MB/s 6 | 6400 | 5880 | 8 | 1960 | 202.6MB/s

num_stripes=4096: 210.6 num_stripes=2096: 209.3 You're right, difference represents only one second for the total time, so we can consider the same speed.

After some more testing looks like the important setting is md_sync_thresh, if set to the optimal value md_num_stripes can be left at 2 x md_sync_window. Is it possible for the script to test a few values for md_sync_thresh between md_sync_window-1 and md_sync_window/2?

Script was not finding the best values for some of my servers, so I've doing some testing on my test server since I don't remember for sure how I arrived at the settings I've been using, some interesting findings, not sure if this helps or makes it more difficult, but after all there was a good reason why I chose my go to values: So, because the script only tests 2 sync_thresh settings and md_num_stripes is always 2 x md_sync_windows, it can't find the best settings. PS: test server has only LSI controllers, I think that's the reason why nr_request doesn't make much difference. Can't run the normal test on this server since the parity check finishes in 2.5minutes

Check finished, original settings: Duration: 5 hours, 32 minutes, 38 seconds. Average speed: 150.3 MB/s New settings, using ~90% less RAM: Duration: 5 hours, 33 minutes, 11 seconds. Average speed: 150.1 MB/s As to the difference in speed reported, see this server as an example, script reports max speed at parity check start of ~185MB/s, unRAID reports ~200MB/s during the first 5% of the check:

unRAID 6 NerdPack But please suggest screen, don't force.

Overnight did a normal test for Tower7, previous short test report for this server is here. unRAID Tunables Tester v4.0b3 by Pauven (for unRAID v6.2) Tunables Report produced Fri Aug 26 00:11:11 BST 2016 Run on server: Tower7 Normal Automatic Parity Sync Test Current Values: md_num_stripes=4096, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdc nr_requests=8 sdd nr_requests=8 sde nr_requests=8 sdf nr_requests=8 sdg nr_requests=8 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 5min Duration)--- Test | RAM | stripes | window | reqs | thresh | MB/s ------------------------------------------------------- 1 | 106 | 4096 | 2048 | 8 | 2000 | 182.4 --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 10min Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 185.9 MB/s 2 | 1536 | 768 | 128 | 384 | 184.6 MB/s 3 | 1536 | 768 | 8 | 767 | 184.7 MB/s 4 | 1536 | 768 | 8 | 384 | 184.7 MB/s Fastest vals were nr_reqs=128 and sync_thresh=99% of sync_window at 185.9 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 5min Duration)--- Test | RAM | stripes | window | reqs | thresh | MB/s | thresh | MB/s ------------------------------------------------------------------------ 1 | 19 | 768 | 384 | 128 | 383 | 184.2 | 192 | 187.6 2 | 23 | 896 | 448 | 128 | 447 | 184.6 | 224 | 183.1 3 | 26 | 1024 | 512 | 128 | 511 | 183.7 | 256 | 184.6 4 | 29 | 1152 | 576 | 128 | 575 | 181.3 | 288 | 184.7 5 | 33 | 1280 | 640 | 128 | 639 | 187.4 | 320 | 184.7 6 | 36 | 1408 | 704 | 128 | 703 | 184.4 | 352 | 185.0 7 | 39 | 1536 | 768 | 128 | 767 | 183.0 | 384 | 181.8 8 | 43 | 1664 | 832 | 128 | 831 | 183.2 | 416 | 184.5 9 | 46 | 1792 | 896 | 128 | 895 | 187.5 | 448 | 181.2 10 | 49 | 1920 | 960 | 128 | 959 | 182.9 | 480 | 184.6 11 | 53 | 2048 | 1024 | 128 | 1023 | 183.8 | 512 | 182.0 12 | 56 | 2176 | 1088 | 128 | 1087 | 181.9 | 544 | 184.7 13 | 59 | 2304 | 1152 | 128 | 1151 | 184.7 | 576 | 182.5 --- FULLY AUTOMATIC TEST PASS 1b (Rough - 5 Sample Points @ 5min Duration)--- Test | RAM | stripes | window | reqs | thresh | MB/s | thresh | MB/s ------------------------------------------------------------------------ 1 | 3 | 128 | 64 | 128 | 63 | 184.3 | 32 | 159.9 2 | 6 | 256 | 128 | 128 | 127 | 184.5 | 64 | 168.0 3 | 9 | 384 | 192 | 128 | 191 | 184.4 | 96 | 181.0 4 | 13 | 512 | 256 | 128 | 255 | 184.5 | 128 | 189.5 5 | 16 | 640 | 320 | 128 | 319 | 184.5 | 160 | 184.6 --- Targeting Fastest Result of md_sync_window 256 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 10min Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 512 | 256 | 128 | 255 | 184.4 MB/s 2 | 512 | 256 | 128 | 128 | 184.3 MB/s 3 | 512 | 256 | 8 | 255 | 184.7 MB/s 4 | 512 | 256 | 8 | 128 | 184.1 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 184.7 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 5min Duration)--- Test | RAM | stripes | window | reqs | thresh | MB/s | thresh | MB/s ------------------------------------------------------------------------ 1 | 6 | 256 | 128 | 8 | 127 | 184.2 | 64 | 166.5 2 | 7 | 272 | 136 | 8 | 135 | 184.4 | 68 | 167.9 3 | 7 | 288 | 144 | 8 | 143 | 184.4 | 72 | 166.7 4 | 7 | 304 | 152 | 8 | 151 | 182.9 | 76 | 175.3 5 | 8 | 320 | 160 | 8 | 159 | 184.9 | 80 | 171.5 6 | 8 | 336 | 168 | 8 | 167 | 185.0 | 84 | 172.0 7 | 9 | 352 | 176 | 8 | 175 | 184.4 | 88 | 171.2 8 | 9 | 368 | 184 | 8 | 183 | 184.4 | 92 | 173.7 9 | 9 | 384 | 192 | 8 | 191 | 184.4 | 96 | 175.1 10 | 10 | 400 | 200 | 8 | 199 | 186.8 | 100 | 180.9 11 | 10 | 416 | 208 | 8 | 207 | 187.4 | 104 | 182.7 12 | 11 | 432 | 216 | 8 | 215 | 186.2 | 108 | 182.6 13 | 11 | 448 | 224 | 8 | 223 | 184.4 | 112 | 184.4 14 | 12 | 464 | 232 | 8 | 231 | 184.5 | 116 | 187.8 15 | 12 | 480 | 240 | 8 | 239 | 184.5 | 120 | 184.8 16 | 12 | 496 | 248 | 8 | 247 | 183.5 | 124 | 184.6 17 | 13 | 512 | 256 | 8 | 255 | 183.8 | 128 | 183.3 18 | 13 | 528 | 264 | 8 | 263 | 184.5 | 132 | 187.3 19 | 14 | 544 | 272 | 8 | 271 | 188.1 | 136 | 184.8 20 | 14 | 560 | 280 | 8 | 279 | 184.8 | 140 | 184.4 21 | 14 | 576 | 288 | 8 | 287 | 183.9 | 144 | 184.5 22 | 15 | 592 | 296 | 8 | 295 | 184.5 | 148 | 187.5 23 | 15 | 608 | 304 | 8 | 303 | 184.7 | 152 | 184.5 24 | 16 | 624 | 312 | 8 | 311 | 184.4 | 156 | 184.7 25 | 16 | 640 | 320 | 8 | 319 | 185.9 | 160 | 182.1 26 | 17 | 656 | 328 | 8 | 327 | 187.4 | 164 | 184.5 27 | 17 | 672 | 336 | 8 | 335 | 187.6 | 168 | 184.5 28 | 17 | 688 | 344 | 8 | 343 | 184.4 | 172 | 184.6 29 | 18 | 704 | 352 | 8 | 351 | 184.5 | 176 | 184.7 30 | 18 | 720 | 360 | 8 | 359 | 184.6 | 180 | 187.4 31 | 19 | 736 | 368 | 8 | 367 | 186.5 | 184 | 184.6 32 | 19 | 752 | 376 | 8 | 375 | 186.1 | 188 | 184.5 33 | 19 | 768 | 384 | 8 | 383 | 184.5 | 192 | 184.7 The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=272 at 188.1 MB/s Tunable (md_num_stripes): 544 Tunable (md_sync_window): 272 Tunable (md_sync_thresh): 271 Tunable (nr_requests): 8 This will consume 14 MB with md_num_stripes=544, 2x md_sync_window. This is 92MB less than your current utilization of 106MB. The Thriftiest Sync Speed tested was md_sync_window=64 at 184.3 MB/s Tunable (md_num_stripes): 128 Tunable (md_sync_window): 64 Tunable (md_sync_thresh): 63 Tunable (nr_requests): 8 This will consume 3 MB with md_num_stripes=128, 2x md_sync_window. This is 103MB less than your current utilization of 106MB. The Recommended Sync Speed is md_sync_window=208 at 187.4 MB/s Tunable (md_num_stripes): 416 Tunable (md_sync_window): 208 Tunable (md_sync_thresh): 207 Tunable (nr_requests): 8 This will consume 10 MB with md_num_stripes=416, 2x md_sync_window. This is 96MB less than your current utilization of 106MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 10 Hrs 17 Min 54 Sec. NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. System Info: Tower7 unRAID version 6.2.0-rc4 md_num_stripes=4096 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=6 CPU: Intel(R) Xeon(R) CPU E31220 @ 3.10GHz RAM: 32GiB System Memory Outputting lshw information for Drives and Controllers: H/W path Device Class Description ======================================================= /0/100/6/0 scsi1 storage ASC-1405 Unified Serial HBA /0/100/6/0/0.1.0 /dev/sdk disk 120GB KINGSTON SV300S3 /0/100/6/0/0.2.0 /dev/sdl disk 120GB KINGSTON SV300S3 /0/100/6/0/0.3.0 /dev/sdm disk 120GB KINGSTON SV300S3 /0/100/6/0/0.0.0 /dev/sdj disk 120GB KINGSTON SV300S3 /0/100/1c/0 storage ASM1062 Serial ATA Controller /0/100/1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller /0/1 scsi0 storage /0/1/0.0.0 /dev/sda disk 7864MB DataTraveler 2.0 /0/1/0.0.0/0 /dev/sda disk 7864MB /0/2 scsi2 storage /0/2/0.0.0 /dev/sdb disk 512GB TS512GSSD370S /0/3 scsi3 storage /0/3/0.0.0 /dev/sdc disk 3TB TOSHIBA DT01ACA3 /0/8 scsi4 storage /0/8/0.0.0 /dev/sdd disk 3TB TOSHIBA DT01ACA3 /0/9 scsi5 storage /0/9/0.0.0 /dev/sde disk 3TB TOSHIBA DT01ACA3 /0/a scsi6 storage /0/a/0.0.0 /dev/sdf disk 3TB TOSHIBA DT01ACA3 /0/b scsi7 storage /0/b/0.0.0 /dev/sdg disk 3TB TOSHIBA DT01ACA3 /0/c scsi8 storage /0/c/0.0.0 /dev/sdh disk 180GB INTEL SSDSC2CT18 /0/d scsi9 storage /0/d/0.0.0 /dev/sdi disk 500GB TOSHIBA MK5055GS Array Devices: Disk0 sdc is a Parity drive named parity Disk1 sdd is a Data drive named disk1 Disk2 sde is a Data drive named disk2 Disk3 sdf is a Data drive named disk3 Disk4 sdg is a Data drive named disk4 Outputting free low memory information... total used free shared buff/cache available Mem: 32991160 5420312 25549684 430264 2021164 26694448 Low: 32991160 7441476 25549684 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT *** Note the much more consistent results, I'm now running a parity check with the fastest values found, I don't expect much speed improvement as this is a very simple server, but if it remains similar as before it means I had exaggeratedly high values and was wasting a lot of RAM. Suggestion: Since the short test is now much faster, how about doubling (or even tripling) each sample time, I believe this would make the short test much more accurate, helping each user decide if it's worth doing the 10 hour normal test. P.S.: could there be a difference in how speeds are reported between the script and unRAID, like one is using MiB/s and other MB/s? I noticed this with the original script, reported unRAID speed is usually about 8% higher than the script, not that it really matters, since the point is finding the best reported speed, but it can look like the script results are slower when in fact they're not.

Power consumption is also important to me, most of my servers are storage only, I turn them on once a week to move data, the smallest server, Tower7, is my VM and docker server and the only one that's always on, the SSD server also has more usage since it's where I store ongoing TV seasons, when the season it's complete it's archived to one of the other servers, after checksums and par2s are created. These are approximate numbers since it's been a while since I measured, with all disks spun up: Tower1 and 6 (22HDDs): 180w Tower2 and 3 (14HDDs): 130w Tower4 (8HDDs) and Tower5 (30SSDs, LSI controllers and the expander are the big users, ~10W each): 90w Tower7 (6HDDs + 6SSDs): 90W (~60W during normal use with all or all but one disk spun down) I only have 2 900VA/540W UPSes for all the servers plus my desktop, with everything on they get close to 500W load each, besides the very low runtime, all servers are in a smallish office type room, so it gets pretty hot quickly, it's nice in the winter

I'm not home now and server is off, but I'll check when I get home, though I'm not sure what to check...

IIRC, 25% was very slow, most of my controllers worked better with sync_thresh close to md_sync_window, except the SASLP and the SAS2LP if nr_request was set at default, as using nr_requests=8 "fixed" the SAS2LP I could then set a high sync_thresh, and so I found that theses values were almost universally good and my go to defaults. Don't remember why some have a higher num_stripes, I believe results were similar with 4400 or 4096, my usual default is 4096/2048/2000 with nr_requests=8, but on a server without any Marvell based controller nr_requests can be left at default. I believe my servers are running close to maximum speed, they are disk limited (CPU limited for the SSD server), I wanted to participate more to help refine the script so more people can benefit, still wouldn't mind getting a few more MB/s out of them.

Basically I found those setting worked great on all my servers, independent of the controllers used. At the time I used your old script, and because it didn't test for md_sync_thresh I manually entered round values, e.g., I would do 4 runs with sync_thresh manually set at 500, 1000, 1500 and 2000 and picked the value with the best result. I also found that in most cases there was only a noticeable difference when the value approached half sync_window, e.g, with a sync_window set at 2048, performance was very similar with sync_thresh set at 1500, 2000 or 2047.

And finally short test for the last one, next I’ll do the normal tests but only during the weekend, it will take some time because if I have all servers on at the same time my UPSes run very close to max capacity with very short runtime in case of a power failure. Tower4 - 8 Disks, 1430SA + Intel PCH unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 14:04:57 BST 2016 Run on server: Tower4 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4096, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdd nr_requests= sdf nr_requests= sdg nr_requests= sdh nr_requests= sdi nr_requests= sdb nr_requests= sdc nr_requests= sde nr_requests= --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 138 | 4096 | 2048 | 8 | 2000 | 145.5 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 106.0 MB/s 2 | 1536 | 768 | 128 | 384 | 85.1 MB/s 3 | 1536 | 768 | 8 | 767 | 100.3 MB/s 4 | 1536 | 768 | 8 | 384 | 74.9 MB/s Fastest vals were nr_reqs=128 and sync_thresh=99% of sync_window at 106.0 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 25 | 768 | 384 | 128 | 383 | 68.2 MB/s 1b | 25 | 768 | 384 | 128 | 192 | 50.7 MB/s 2a | 30 | 896 | 448 | 128 | 447 | 82.0 MB/s 2b | 30 | 896 | 448 | 128 | 224 | 55.0 MB/s 3a | 34 | 1024 | 512 | 128 | 511 | 81.4 MB/s 3b | 34 | 1024 | 512 | 128 | 256 | 62.3 MB/s 4a | 38 | 1152 | 576 | 128 | 575 | 92.7 MB/s 4b | 38 | 1152 | 576 | 128 | 288 | 71.1 MB/s 5a | 43 | 1280 | 640 | 128 | 639 | 97.6 MB/s 5b | 43 | 1280 | 640 | 128 | 320 | 83.7 MB/s 6a | 47 | 1408 | 704 | 128 | 703 | 101.1 MB/s 6b | 47 | 1408 | 704 | 128 | 352 | 84.2 MB/s 7a | 51 | 1536 | 768 | 128 | 767 | 100.4 MB/s 7b | 51 | 1536 | 768 | 128 | 384 | 88.7 MB/s 8a | 56 | 1664 | 832 | 128 | 831 | 102.7 MB/s 8b | 56 | 1664 | 832 | 128 | 416 | 88.7 MB/s 9a | 60 | 1792 | 896 | 128 | 895 | 114.5 MB/s 9b | 60 | 1792 | 896 | 128 | 448 | 88.9 MB/s 10a | 64 | 1920 | 960 | 128 | 959 | 110.5 MB/s 10b | 64 | 1920 | 960 | 128 | 480 | 96.6 MB/s 11a | 69 | 2048 | 1024 | 128 | 1023 | 116.4 MB/s 11b | 69 | 2048 | 1024 | 128 | 512 | 95.9 MB/s 12a | 73 | 2176 | 1088 | 128 | 1087 | 117.6 MB/s 12b | 73 | 2176 | 1088 | 128 | 544 | 102.9 MB/s 13a | 77 | 2304 | 1152 | 128 | 1151 | 112.9 MB/s 13b | 77 | 2304 | 1152 | 128 | 576 | 105.1 MB/s --- Targeting Fastest Result of md_sync_window 1088 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 2176 | 1088 | 128 | 1087 | 116.5 MB/s 2 | 2176 | 1088 | 128 | 544 | 103.7 MB/s 3 | 2176 | 1088 | 8 | 1087 | 122.6 MB/s 4 | 2176 | 1088 | 8 | 544 | 107.8 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 122.6 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 64 | 1920 | 960 | 8 | 959 | 108.9 MB/s 1b | 64 | 1920 | 960 | 8 | 480 | 101.8 MB/s 2a | 65 | 1936 | 968 | 8 | 967 | 112.7 MB/s 2b | 65 | 1936 | 968 | 8 | 484 | 104.0 MB/s 3a | 65 | 1952 | 976 | 8 | 975 | 113.2 MB/s 3b | 65 | 1952 | 976 | 8 | 488 | 100.9 MB/s 4a | 66 | 1968 | 984 | 8 | 983 | 118.1 MB/s 4b | 66 | 1968 | 984 | 8 | 492 | 102.3 MB/s 5a | 66 | 1984 | 992 | 8 | 991 | 108.9 MB/s 5b | 66 | 1984 | 992 | 8 | 496 | 97.6 MB/s 6a | 67 | 2000 | 1000 | 8 | 999 | 111.1 MB/s 6b | 67 | 2000 | 1000 | 8 | 500 | 101.7 MB/s 7a | 68 | 2016 | 1008 | 8 | 1007 | 117.5 MB/s 7b | 68 | 2016 | 1008 | 8 | 504 | 107.1 MB/s 8a | 68 | 2032 | 1016 | 8 | 1015 | 120.0 MB/s 8b | 68 | 2032 | 1016 | 8 | 508 | 101.3 MB/s 9a | 69 | 2048 | 1024 | 8 | 1023 | 115.3 MB/s 9b | 69 | 2048 | 1024 | 8 | 512 | 98.8 MB/s 10a | 69 | 2064 | 1032 | 8 | 1031 | 120.1 MB/s 10b | 69 | 2064 | 1032 | 8 | 516 | 101.3 MB/s 11a | 70 | 2080 | 1040 | 8 | 1039 | 114.7 MB/s 11b | 70 | 2080 | 1040 | 8 | 520 | 104.2 MB/s 12a | 70 | 2096 | 1048 | 8 | 1047 | 121.2 MB/s 12b | 70 | 2096 | 1048 | 8 | 524 | 102.8 MB/s 13a | 71 | 2112 | 1056 | 8 | 1055 | 116.4 MB/s 13b | 71 | 2112 | 1056 | 8 | 528 | 101.1 MB/s 14a | 71 | 2128 | 1064 | 8 | 1063 | 121.6 MB/s 14b | 71 | 2128 | 1064 | 8 | 532 | 108.8 MB/s 15a | 72 | 2144 | 1072 | 8 | 1071 | 120.3 MB/s 15b | 72 | 2144 | 1072 | 8 | 536 | 99.2 MB/s 16a | 72 | 2160 | 1080 | 8 | 1079 | 117.8 MB/s 16b | 72 | 2160 | 1080 | 8 | 540 | 99.7 MB/s 17a | 73 | 2176 | 1088 | 8 | 1087 | 120.8 MB/s 17b | 73 | 2176 | 1088 | 8 | 544 | 102.3 MB/s 18a | 74 | 2192 | 1096 | 8 | 1095 | 121.1 MB/s 18b | 74 | 2192 | 1096 | 8 | 548 | 103.2 MB/s 19a | 74 | 2208 | 1104 | 8 | 1103 | 118.9 MB/s 19b | 74 | 2208 | 1104 | 8 | 552 | 103.5 MB/s 20a | 75 | 2224 | 1112 | 8 | 1111 | 119.4 MB/s 20b | 75 | 2224 | 1112 | 8 | 556 | 102.8 MB/s 21a | 75 | 2240 | 1120 | 8 | 1119 | 121.7 MB/s 21b | 75 | 2240 | 1120 | 8 | 560 | 103.6 MB/s 22a | 76 | 2256 | 1128 | 8 | 1127 | 117.2 MB/s 22b | 76 | 2256 | 1128 | 8 | 564 | 110.6 MB/s 23a | 76 | 2272 | 1136 | 8 | 1135 | 113.1 MB/s 23b | 76 | 2272 | 1136 | 8 | 568 | 105.2 MB/s 24a | 77 | 2288 | 1144 | 8 | 1143 | 118.5 MB/s 24b | 77 | 2288 | 1144 | 8 | 572 | 106.3 MB/s 25a | 77 | 2304 | 1152 | 8 | 1151 | 118.7 MB/s 25b | 77 | 2304 | 1152 | 8 | 576 | 105.9 MB/s 26a | 78 | 2320 | 1160 | 8 | 1159 | 113.4 MB/s 26b | 78 | 2320 | 1160 | 8 | 580 | 104.5 MB/s 27a | 78 | 2336 | 1168 | 8 | 1167 | 111.8 MB/s 27b | 78 | 2336 | 1168 | 8 | 584 | 102.9 MB/s 28a | 79 | 2352 | 1176 | 8 | 1175 | 120.3 MB/s 28b | 79 | 2352 | 1176 | 8 | 588 | 100.4 MB/s 29a | 79 | 2368 | 1184 | 8 | 1183 | 123.0 MB/s 29b | 79 | 2368 | 1184 | 8 | 592 | 103.1 MB/s 30a | 80 | 2384 | 1192 | 8 | 1191 | 120.9 MB/s 30b | 80 | 2384 | 1192 | 8 | 596 | 108.0 MB/s 31a | 81 | 2400 | 1200 | 8 | 1199 | 123.6 MB/s 31b | 81 | 2400 | 1200 | 8 | 600 | 110.5 MB/s 32a | 81 | 2416 | 1208 | 8 | 1207 | 127.0 MB/s 32b | 81 | 2416 | 1208 | 8 | 604 | 104.1 MB/s 33a | 82 | 2432 | 1216 | 8 | 1215 | 124.1 MB/s 33b | 82 | 2432 | 1216 | 8 | 608 | 108.3 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=1208 at 127.0 MB/s Tunable (md_num_stripes): 2416 Tunable (md_sync_window): 1208 Tunable (md_sync_thresh): 1207 Tunable (nr_requests): 8 This will consume 81 MB with md_num_stripes=2416, 2x md_sync_window. This is 57MB less than your current utilization of 138MB. The Thriftiest Sync Speed tested was md_sync_window=1048 at 121.2 MB/s Tunable (md_num_stripes): 2096 Tunable (md_sync_window): 1048 Tunable (md_sync_thresh): 1047 Tunable (nr_requests): 8 This will consume 70 MB with md_num_stripes=2096, 2x md_sync_window. This is 68MB less than your current utilization of 138MB. The Recommended Sync Speed is md_sync_window=1208 at 127.0 MB/s Tunable (md_num_stripes): 2416 Tunable (md_sync_window): 1208 Tunable (md_sync_thresh): 1207 Tunable (nr_requests): 8 This will consume 81 MB with md_num_stripes=2416, 2x md_sync_window. This is 57MB less than your current utilization of 138MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 1 Hrs 1 Min 20 Sec. System Info: Tower4 unRAID version 6.2.0-rc4 md_num_stripes=4096 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=8 CPU: Intel(R) Celeron(R) CPU G550 @ 2.60GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description =================================================== pci@0000:01:00.0 storage Serial ATA II RAID 1430SA pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.1 scsi0 storage scsi@0:0.0.0 /dev/sda disk 7862MB DT Micro /dev/sda disk 7862MB scsi3 storage scsi@3:0.0.0 /dev/sdb disk 4TB WDC WD40EZRX-00S scsi4 storage scsi@4:0.0.0 /dev/sdc disk 4TB WDC WD40EZRX-00S scsi5 storage scsi@5:0.0.0 /dev/sdd disk 8001GB ST8000AS0002-1NA scsi6 storage scsi@6:0.0.0 /dev/sde disk 8001GB ST8000AS0002-1NA scsi7 storage scsi@7:0.0.0 /dev/sdf disk 8001GB ST8000AS0002-1NA scsi8 storage scsi@8:0.0.0 /dev/sdg disk 8001GB ST8000AS0002-1NA scsi9 storage scsi@9:0.0.0 /dev/sdh disk 8001GB ST8000AS0002-1NA scsi10 storage scsi@10:0.0.0 /dev/sdi disk 4TB WDC WD40EZRX-00S Array Devices: Disk0 sdd is a Parity drive named parity Disk1 sdf is a Data drive named disk1 Disk2 sdg is a Data drive named disk2 Disk3 sdh is a Data drive named disk3 Disk4 sdi is a Data drive named disk4 Disk5 sdb is a Data drive named disk5 Disk6 sdc is a Data drive named disk6 Disk29 sde is a Parity drive named parity2 Outputting free low memory information... total used free shared buff/cache available Mem: 8152960 196872 7437136 406136 518952 7305876 Low: 8152960 715824 7437136 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***

Tower3 - This is a backup server, so it's single parity only and uses my oldest and slowest disks (except both 6TB), 14 disks, SASLP + 1430SA + Intel PCH: unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 14:15:02 BST 2016 Run on server: Tower3 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4480, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdf nr_requests=8 sdg nr_requests=8 sdh nr_requests=8 sdi nr_requests=8 sdn nr_requests=8 sdm nr_requests=8 sdo nr_requests=8 sdl nr_requests=8 sdb nr_requests=8 sdc nr_requests=8 sdj nr_requests=8 sdk nr_requests=8 sde nr_requests=8 sdd nr_requests=8 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 273 | 4480 | 2048 | 8 | 2000 | 93.4 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 85.4 MB/s 2 | 1536 | 768 | 128 | 384 | 68.1 MB/s 3 | 1536 | 768 | 8 | 767 | 72.1 MB/s 4 | 1536 | 768 | 8 | 384 | 66.5 MB/s Fastest vals were nr_reqs=128 and sync_thresh=99% of sync_window at 85.4 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 46 | 768 | 384 | 128 | 383 | 60.0 MB/s 1b | 46 | 768 | 384 | 128 | 192 | 43.3 MB/s 2a | 54 | 896 | 448 | 128 | 447 | 69.0 MB/s 2b | 54 | 896 | 448 | 128 | 224 | 50.8 MB/s 3a | 62 | 1024 | 512 | 128 | 511 | 75.0 MB/s 3b | 62 | 1024 | 512 | 128 | 256 | 56.5 MB/s 4a | 70 | 1152 | 576 | 128 | 575 | 64.2 MB/s 4b | 70 | 1152 | 576 | 128 | 288 | 61.6 MB/s 5a | 78 | 1280 | 640 | 128 | 639 | 75.6 MB/s 5b | 78 | 1280 | 640 | 128 | 320 | 70.4 MB/s 6a | 86 | 1408 | 704 | 128 | 703 | 86.2 MB/s 6b | 86 | 1408 | 704 | 128 | 352 | 71.1 MB/s 7a | 93 | 1536 | 768 | 128 | 767 | 86.6 MB/s 7b | 93 | 1536 | 768 | 128 | 384 | 73.7 MB/s 8a | 101 | 1664 | 832 | 128 | 831 | 89.4 MB/s 8b | 101 | 1664 | 832 | 128 | 416 | 74.8 MB/s 9a | 109 | 1792 | 896 | 128 | 895 | 88.1 MB/s 9b | 109 | 1792 | 896 | 128 | 448 | 80.7 MB/s 10a | 117 | 1920 | 960 | 128 | 959 | 88.7 MB/s 10b | 117 | 1920 | 960 | 128 | 480 | 78.9 MB/s 11a | 125 | 2048 | 1024 | 128 | 1023 | 90.6 MB/s 11b | 125 | 2048 | 1024 | 128 | 512 | 79.9 MB/s 12a | 132 | 2176 | 1088 | 128 | 1087 | 88.7 MB/s 12b | 132 | 2176 | 1088 | 128 | 544 | 80.5 MB/s 13a | 140 | 2304 | 1152 | 128 | 1151 | 88.5 MB/s 13b | 140 | 2304 | 1152 | 128 | 576 | 82.2 MB/s --- Targeting Fastest Result of md_sync_window 1024 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 2048 | 1024 | 128 | 1023 | 78.9 MB/s 2 | 2048 | 1024 | 128 | 512 | 81.1 MB/s 3 | 2048 | 1024 | 8 | 1023 | 84.7 MB/s 4 | 2048 | 1024 | 8 | 512 | 81.4 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 84.7 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 109 | 1792 | 896 | 8 | 895 | 83.1 MB/s 1b | 109 | 1792 | 896 | 8 | 448 | 80.2 MB/s 2a | 110 | 1808 | 904 | 8 | 903 | 83.7 MB/s 2b | 110 | 1808 | 904 | 8 | 452 | 81.1 MB/s 3a | 111 | 1824 | 912 | 8 | 911 | 59.2 MB/s 3b | 111 | 1824 | 912 | 8 | 456 | 77.6 MB/s 4a | 112 | 1840 | 920 | 8 | 919 | 82.3 MB/s 4b | 112 | 1840 | 920 | 8 | 460 | 78.3 MB/s 5a | 113 | 1856 | 928 | 8 | 927 | 75.4 MB/s 5b | 113 | 1856 | 928 | 8 | 464 | 77.3 MB/s 6a | 114 | 1872 | 936 | 8 | 935 | 81.5 MB/s 6b | 114 | 1872 | 936 | 8 | 468 | 77.6 MB/s 7a | 115 | 1888 | 944 | 8 | 943 | 81.8 MB/s 7b | 115 | 1888 | 944 | 8 | 472 | 78.8 MB/s 8a | 116 | 1904 | 952 | 8 | 951 | 84.4 MB/s 8b | 116 | 1904 | 952 | 8 | 476 | 79.5 MB/s 9a | 117 | 1920 | 960 | 8 | 959 | 83.6 MB/s 9b | 117 | 1920 | 960 | 8 | 480 | 78.9 MB/s 10a | 118 | 1936 | 968 | 8 | 967 | 82.6 MB/s 10b | 118 | 1936 | 968 | 8 | 484 | 79.8 MB/s 11a | 119 | 1952 | 976 | 8 | 975 | 81.6 MB/s 11b | 119 | 1952 | 976 | 8 | 488 | 79.6 MB/s 12a | 120 | 1968 | 984 | 8 | 983 | 82.8 MB/s 12b | 120 | 1968 | 984 | 8 | 492 | 78.6 MB/s 13a | 121 | 1984 | 992 | 8 | 991 | 82.0 MB/s 13b | 121 | 1984 | 992 | 8 | 496 | 65.1 MB/s 14a | 122 | 2000 | 1000 | 8 | 999 | 82.1 MB/s 14b | 122 | 2000 | 1000 | 8 | 500 | 74.5 MB/s 15a | 123 | 2016 | 1008 | 8 | 1007 | 77.1 MB/s 15b | 123 | 2016 | 1008 | 8 | 504 | 81.2 MB/s 16a | 124 | 2032 | 1016 | 8 | 1015 | 77.9 MB/s 16b | 124 | 2032 | 1016 | 8 | 508 | 77.0 MB/s 17a | 125 | 2048 | 1024 | 8 | 1023 | 79.4 MB/s 17b | 125 | 2048 | 1024 | 8 | 512 | 76.5 MB/s 18a | 126 | 2064 | 1032 | 8 | 1031 | 81.4 MB/s 18b | 126 | 2064 | 1032 | 8 | 516 | 79.2 MB/s 19a | 127 | 2080 | 1040 | 8 | 1039 | 69.4 MB/s 19b | 127 | 2080 | 1040 | 8 | 520 | 77.3 MB/s 20a | 128 | 2096 | 1048 | 8 | 1047 | 80.2 MB/s 20b | 128 | 2096 | 1048 | 8 | 524 | 78.7 MB/s 21a | 129 | 2112 | 1056 | 8 | 1055 | 84.1 MB/s 21b | 129 | 2112 | 1056 | 8 | 528 | 80.5 MB/s 22a | 130 | 2128 | 1064 | 8 | 1063 | 82.8 MB/s 22b | 130 | 2128 | 1064 | 8 | 532 | 80.8 MB/s 23a | 131 | 2144 | 1072 | 8 | 1071 | 83.2 MB/s 23b | 131 | 2144 | 1072 | 8 | 536 | 83.7 MB/s 24a | 132 | 2160 | 1080 | 8 | 1079 | 83.3 MB/s 24b | 132 | 2160 | 1080 | 8 | 540 | 65.6 MB/s 25a | 132 | 2176 | 1088 | 8 | 1087 | 84.4 MB/s 25b | 132 | 2176 | 1088 | 8 | 544 | 80.0 MB/s 26a | 133 | 2192 | 1096 | 8 | 1095 | 82.0 MB/s 26b | 133 | 2192 | 1096 | 8 | 548 | 80.7 MB/s 27a | 134 | 2208 | 1104 | 8 | 1103 | 82.2 MB/s 27b | 134 | 2208 | 1104 | 8 | 552 | 74.8 MB/s 28a | 135 | 2224 | 1112 | 8 | 1111 | 83.6 MB/s 28b | 135 | 2224 | 1112 | 8 | 556 | 76.3 MB/s 29a | 136 | 2240 | 1120 | 8 | 1119 | 79.6 MB/s 29b | 136 | 2240 | 1120 | 8 | 560 | 68.8 MB/s 30a | 137 | 2256 | 1128 | 8 | 1127 | 83.7 MB/s 30b | 137 | 2256 | 1128 | 8 | 564 | 80.4 MB/s 31a | 138 | 2272 | 1136 | 8 | 1135 | 82.9 MB/s 31b | 138 | 2272 | 1136 | 8 | 568 | 80.6 MB/s 32a | 139 | 2288 | 1144 | 8 | 1143 | 81.1 MB/s 32b | 139 | 2288 | 1144 | 8 | 572 | 79.3 MB/s 33a | 140 | 2304 | 1152 | 8 | 1151 | 84.9 MB/s 33b | 140 | 2304 | 1152 | 8 | 576 | 79.5 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=832 at 89.4 MB/s Tunable (md_num_stripes): 1664 Tunable (md_sync_window): 832 Tunable (md_sync_thresh): 831 Tunable (nr_requests): 8 This will consume 101 MB with md_num_stripes=1664, 2x md_sync_window. This is 172MB less than your current utilization of 273MB. The Thriftiest Sync Speed tested was md_sync_window=704 at 86.2 MB/s Tunable (md_num_stripes): 1408 Tunable (md_sync_window): 704 Tunable (md_sync_thresh): 703 Tunable (nr_requests): 8 This will consume 86 MB with md_num_stripes=1408, 2x md_sync_window. This is 187MB less than your current utilization of 273MB. The Recommended Sync Speed is md_sync_window=832 at 89.4 MB/s Tunable (md_num_stripes): 1664 Tunable (md_sync_window): 832 Tunable (md_sync_thresh): 831 Tunable (nr_requests): 8 This will consume 101 MB with md_num_stripes=1664, 2x md_sync_window. This is 172MB less than your current utilization of 273MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 1 Hrs 1 Min 34 Sec. System Info: Tower3 unRAID version 6.2.0-rc4 md_num_stripes=4480 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=15 CPU: Intel(R) Celeron(R) CPU G550 @ 2.60GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description =================================================== pci@0000:01:00.0 storage Serial ATA II RAID 1430SA pci@0000:02:00.0 scsi2 storage MV64460/64461/64462 System Controller, Revision B scsi@2:0.0.0 /dev/sdl disk 2TB SAMSUNG HD203WI scsi@2:0.1.0 /dev/sdm disk 2TB SAMSUNG HD203WI scsi@2:0.2.0 /dev/sdn disk 2TB SAMSUNG HD203WI scsi@2:0.3.0 /dev/sdo disk 2TB SAMSUNG HD203WI pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.1 scsi0 storage scsi@0:0.0.0 /dev/sda disk 7862MB DT Micro /dev/sda disk 7862MB scsi1 storage scsi@1:0.0.0 /dev/sdb disk 2TB SAMSUNG HD203WI scsi11 storage scsi@11:0.0.0 /dev/sdk disk 3TB TOSHIBA DT01ABA3 scsi3 storage scsi@3:0.0.0 /dev/sdc disk 2TB SAMSUNG HD203WI scsi4 storage scsi@4:0.0.0 /dev/sdd disk 3TB WDC WD30EZRX-00S scsi5 storage scsi@5:0.0.0 /dev/sde disk 6001GB WDC WD60EZRX-00M scsi6 storage scsi@6:0.0.0 /dev/sdf disk 6001GB TOSHIBA HDWE160 scsi7 storage scsi@7:0.0.0 /dev/sdg disk 3TB WDC WD30EZRX-00M scsi8 storage scsi@8:0.0.0 /dev/sdh disk 2TB WDC WD20EARX-00P scsi9 storage scsi@9:0.0.0 /dev/sdi disk 2TB WDC WD20EZRX-00D scsi10 storage scsi@10:0.0.0 /dev/sdj disk 3TB WDC WD30EZRX-22D Array Devices: Disk0 sdf is a Parity drive named parity Disk1 sdg is a Data drive named disk1 Disk2 sdh is a Data drive named disk2 Disk3 sdi is a Data drive named disk3 Disk4 sdn is a Data drive named disk4 Disk5 sdm is a Data drive named disk5 Disk6 sdo is a Data drive named disk6 Disk7 sdl is a Data drive named disk7 Disk8 sdb is a Data drive named disk8 Disk9 sdc is a Data drive named disk9 Disk10 sdj is a Data drive named disk10 Disk11 sdk is a Data drive named disk11 Disk12 sde is a Data drive named disk12 Disk13 sdd is a Data drive named disk13 Outputting free low memory information... total used free shared buff/cache available Mem: 8152960 340576 7306528 410904 505856 7163528 Low: 8152960 846432 7306528 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***

Tower2 - 14 Disks (3 and 4TB), LSI 9211-8i (flash H310) + Intel PCH unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 13:54:12 BST 2016 Run on server: Tower2 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4480, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=128 sdb nr_requests=128 sde nr_requests=128 sdd nr_requests=128 sdf nr_requests=128 sdo nr_requests=128 sdn nr_requests=128 sdm nr_requests=128 sdl nr_requests=128 sdg nr_requests=128 sdk nr_requests=128 sdj nr_requests=128 sdh nr_requests=128 sdi nr_requests=128 sdc nr_requests=128 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 256 | 4480 | 2048 | 128 | 2000 | 130.8 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 116.9 MB/s 2 | 1536 | 768 | 128 | 384 | 100.1 MB/s 3 | 1536 | 768 | 8 | 767 | 111.9 MB/s 4 | 1536 | 768 | 8 | 384 | 100.8 MB/s Fastest vals were nr_reqs=128 and sync_thresh=99% of sync_window at 116.9 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 43 | 768 | 384 | 128 | 383 | 95.9 MB/s 1b | 43 | 768 | 384 | 128 | 192 | 89.1 MB/s 2a | 51 | 896 | 448 | 128 | 447 | 94.3 MB/s 2b | 51 | 896 | 448 | 128 | 224 | 94.1 MB/s 3a | 58 | 1024 | 512 | 128 | 511 | 108.4 MB/s 3b | 58 | 1024 | 512 | 128 | 256 | 98.7 MB/s 4a | 65 | 1152 | 576 | 128 | 575 | 106.4 MB/s 4b | 65 | 1152 | 576 | 128 | 288 | 102.2 MB/s 5a | 73 | 1280 | 640 | 128 | 639 | 117.3 MB/s 5b | 73 | 1280 | 640 | 128 | 320 | 98.1 MB/s 6a | 80 | 1408 | 704 | 128 | 703 | 113.1 MB/s 6b | 80 | 1408 | 704 | 128 | 352 | 100.4 MB/s 7a | 87 | 1536 | 768 | 128 | 767 | 94.3 MB/s 7b | 87 | 1536 | 768 | 128 | 384 | 100.5 MB/s 8a | 95 | 1664 | 832 | 128 | 831 | 102.2 MB/s 8b | 95 | 1664 | 832 | 128 | 416 | 101.6 MB/s 9a | 102 | 1792 | 896 | 128 | 895 | 106.6 MB/s 9b | 102 | 1792 | 896 | 128 | 448 | 103.4 MB/s 10a | 109 | 1920 | 960 | 128 | 959 | 103.4 MB/s 10b | 109 | 1920 | 960 | 128 | 480 | 102.8 MB/s 11a | 117 | 2048 | 1024 | 128 | 1023 | 115.1 MB/s 11b | 117 | 2048 | 1024 | 128 | 512 | 111.6 MB/s 12a | 124 | 2176 | 1088 | 128 | 1087 | 116.2 MB/s 12b | 124 | 2176 | 1088 | 128 | 544 | 107.1 MB/s 13a | 131 | 2304 | 1152 | 128 | 1151 | 117.4 MB/s 13b | 131 | 2304 | 1152 | 128 | 576 | 107.1 MB/s --- FULLY AUTOMATIC TEST PASS 1c (Rough - 18 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 139 | 2432 | 1216 | 128 | 1215 | 115.0 MB/s 1b | 139 | 2432 | 1216 | 128 | 608 | 110.7 MB/s 2a | 146 | 2560 | 1280 | 128 | 1279 | 85.8 MB/s 2b | 146 | 2560 | 1280 | 128 | 640 | 109.9 MB/s 3a | 153 | 2688 | 1344 | 128 | 1343 | 108.2 MB/s 3b | 153 | 2688 | 1344 | 128 | 672 | 111.5 MB/s 4a | 161 | 2816 | 1408 | 128 | 1407 | 82.1 MB/s 4b | 161 | 2816 | 1408 | 128 | 704 | 112.2 MB/s 5a | 168 | 2944 | 1472 | 128 | 1471 | 114.9 MB/s 5b | 168 | 2944 | 1472 | 128 | 736 | 112.9 MB/s 6a | 175 | 3072 | 1536 | 128 | 1535 | 113.8 MB/s 6b | 175 | 3072 | 1536 | 128 | 768 | 112.2 MB/s 7a | 183 | 3200 | 1600 | 128 | 1599 | 121.2 MB/s 7b | 183 | 3200 | 1600 | 128 | 800 | 115.3 MB/s 8a | 190 | 3328 | 1664 | 128 | 1663 | 124.9 MB/s 8b | 190 | 3328 | 1664 | 128 | 832 | 117.2 MB/s 9a | 197 | 3456 | 1728 | 128 | 1727 | 123.2 MB/s 9b | 197 | 3456 | 1728 | 128 | 864 | 117.2 MB/s 10a | 205 | 3584 | 1792 | 128 | 1791 | 115.1 MB/s 10b | 205 | 3584 | 1792 | 128 | 896 | 114.3 MB/s 11a | 212 | 3712 | 1856 | 128 | 1855 | 116.6 MB/s 11b | 212 | 3712 | 1856 | 128 | 928 | 115.8 MB/s 12a | 219 | 3840 | 1920 | 128 | 1919 | 79.8 MB/s 12b | 219 | 3840 | 1920 | 128 | 960 | 116.8 MB/s 13a | 226 | 3968 | 1984 | 128 | 1983 | 122.9 MB/s 13b | 226 | 3968 | 1984 | 128 | 992 | 113.3 MB/s 14a | 234 | 4096 | 2048 | 128 | 2047 | 119.6 MB/s 14b | 234 | 4096 | 2048 | 128 | 1024 | 115.0 MB/s 15a | 241 | 4224 | 2112 | 128 | 2111 | 116.0 MB/s 15b | 241 | 4224 | 2112 | 128 | 1056 | 118.7 MB/s 16a | 248 | 4352 | 2176 | 128 | 2175 | 112.7 MB/s 16b | 248 | 4352 | 2176 | 128 | 1088 | 116.2 MB/s 17a | 256 | 4480 | 2240 | 128 | 2239 | 128.7 MB/s 17b | 256 | 4480 | 2240 | 128 | 1120 | 117.0 MB/s 18a | 263 | 4608 | 2304 | 128 | 2303 | 127.6 MB/s 18b | 263 | 4608 | 2304 | 128 | 1152 | 119.0 MB/s --- Targeting Fastest Result of md_sync_window 2240 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 4480 | 2240 | 128 | 2239 | 118.6 MB/s 2 | 4480 | 2240 | 128 | 1120 | 119.5 MB/s 3 | 4480 | 2240 | 8 | 2239 | 123.6 MB/s 4 | 4480 | 2240 | 8 | 1120 | 124.4 MB/s Fastest vals were nr_reqs=8 and sync_thresh=50% of sync_window at 124.4 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 241 | 4224 | 2112 | 8 | 2111 | 114.9 MB/s 1b | 241 | 4224 | 2112 | 8 | 1056 | 123.2 MB/s 2a | 242 | 4240 | 2120 | 8 | 2119 | 122.0 MB/s 2b | 242 | 4240 | 2120 | 8 | 1060 | 123.1 MB/s 3a | 243 | 4256 | 2128 | 8 | 2127 | 123.5 MB/s 3b | 243 | 4256 | 2128 | 8 | 1064 | 120.8 MB/s 4a | 244 | 4272 | 2136 | 8 | 2135 | 124.4 MB/s 4b | 244 | 4272 | 2136 | 8 | 1068 | 122.0 MB/s 5a | 245 | 4288 | 2144 | 8 | 2143 | 123.9 MB/s 5b | 245 | 4288 | 2144 | 8 | 1072 | 123.6 MB/s 6a | 246 | 4304 | 2152 | 8 | 2151 | 123.8 MB/s 6b | 246 | 4304 | 2152 | 8 | 1076 | 125.1 MB/s 7a | 247 | 4320 | 2160 | 8 | 2159 | 123.7 MB/s 7b | 247 | 4320 | 2160 | 8 | 1080 | 123.4 MB/s 8a | 248 | 4336 | 2168 | 8 | 2167 | 123.7 MB/s 8b | 248 | 4336 | 2168 | 8 | 1084 | 120.2 MB/s 9a | 248 | 4352 | 2176 | 8 | 2175 | 124.0 MB/s 9b | 248 | 4352 | 2176 | 8 | 1088 | 124.8 MB/s 10a | 249 | 4368 | 2184 | 8 | 2183 | 122.4 MB/s 10b | 249 | 4368 | 2184 | 8 | 1092 | 119.1 MB/s 11a | 250 | 4384 | 2192 | 8 | 2191 | 104.9 MB/s 11b | 250 | 4384 | 2192 | 8 | 1096 | 120.0 MB/s 12a | 251 | 4400 | 2200 | 8 | 2199 | 100.7 MB/s 12b | 251 | 4400 | 2200 | 8 | 1100 | 121.5 MB/s 13a | 252 | 4416 | 2208 | 8 | 2207 | 119.7 MB/s 13b | 252 | 4416 | 2208 | 8 | 1104 | 119.7 MB/s 14a | 253 | 4432 | 2216 | 8 | 2215 | 119.9 MB/s 14b | 253 | 4432 | 2216 | 8 | 1108 | 122.3 MB/s 15a | 254 | 4448 | 2224 | 8 | 2223 | 120.8 MB/s 15b | 254 | 4448 | 2224 | 8 | 1112 | 120.5 MB/s 16a | 255 | 4464 | 2232 | 8 | 2231 | 123.5 MB/s 16b | 255 | 4464 | 2232 | 8 | 1116 | 123.4 MB/s 17a | 256 | 4480 | 2240 | 8 | 2239 | 124.2 MB/s 17b | 256 | 4480 | 2240 | 8 | 1120 | 121.2 MB/s 18a | 257 | 4496 | 2248 | 8 | 2247 | 118.1 MB/s 18b | 257 | 4496 | 2248 | 8 | 1124 | 120.4 MB/s 19a | 258 | 4512 | 2256 | 8 | 2255 | 122.2 MB/s 19b | 258 | 4512 | 2256 | 8 | 1128 | 123.1 MB/s 20a | 259 | 4528 | 2264 | 8 | 2263 | 119.3 MB/s 20b | 259 | 4528 | 2264 | 8 | 1132 | 122.7 MB/s 21a | 259 | 4544 | 2272 | 8 | 2271 | 123.0 MB/s 21b | 259 | 4544 | 2272 | 8 | 1136 | 123.3 MB/s 22a | 260 | 4560 | 2280 | 8 | 2279 | 123.6 MB/s 22b | 260 | 4560 | 2280 | 8 | 1140 | 121.0 MB/s 23a | 261 | 4576 | 2288 | 8 | 2287 | 123.0 MB/s 23b | 261 | 4576 | 2288 | 8 | 1144 | 123.7 MB/s 24a | 262 | 4592 | 2296 | 8 | 2295 | 113.0 MB/s 24b | 262 | 4592 | 2296 | 8 | 1148 | 124.0 MB/s 25a | 263 | 4608 | 2304 | 8 | 2303 | 123.9 MB/s 25b | 263 | 4608 | 2304 | 8 | 1152 | 123.9 MB/s 26a | 264 | 4624 | 2312 | 8 | 2311 | 105.7 MB/s 26b | 264 | 4624 | 2312 | 8 | 1156 | 124.1 MB/s 27a | 265 | 4640 | 2320 | 8 | 2319 | 121.6 MB/s 27b | 265 | 4640 | 2320 | 8 | 1160 | 123.9 MB/s 28a | 266 | 4656 | 2328 | 8 | 2327 | 124.0 MB/s 28b | 266 | 4656 | 2328 | 8 | 1164 | 121.4 MB/s 29a | 267 | 4672 | 2336 | 8 | 2335 | 123.0 MB/s 29b | 267 | 4672 | 2336 | 8 | 1168 | 124.8 MB/s 30a | 268 | 4688 | 2344 | 8 | 2343 | 122.0 MB/s 30b | 268 | 4688 | 2344 | 8 | 1172 | 121.8 MB/s 31a | 269 | 4704 | 2352 | 8 | 2351 | 119.3 MB/s 31b | 269 | 4704 | 2352 | 8 | 1176 | 121.7 MB/s 32a | 270 | 4720 | 2360 | 8 | 2359 | 120.0 MB/s 32b | 270 | 4720 | 2360 | 8 | 1180 | 122.3 MB/s 33a | 270 | 4736 | 2368 | 8 | 2367 | 124.8 MB/s 33b | 270 | 4736 | 2368 | 8 | 1184 | 122.9 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=2152 at 125.1 MB/s Tunable (md_num_stripes): 4304 Tunable (md_sync_window): 2152 Tunable (md_sync_thresh): 1076 Tunable (nr_requests): 8 This will consume 246 MB with md_num_stripes=4304, 2x md_sync_window. This is 10MB less than your current utilization of 256MB. The Thriftiest Sync Speed tested was md_sync_window=2112 at 123.2 MB/s Tunable (md_num_stripes): 4224 Tunable (md_sync_window): 2112 Tunable (md_sync_thresh): 1056 Tunable (nr_requests): 8 This will consume 241 MB with md_num_stripes=4224, 2x md_sync_window. This is 15MB less than your current utilization of 256MB. The Recommended Sync Speed is md_sync_window=2152 at 125.1 MB/s Tunable (md_num_stripes): 4304 Tunable (md_sync_window): 2152 Tunable (md_sync_thresh): 1076 Tunable (nr_requests): 8 This will consume 246 MB with md_num_stripes=4304, 2x md_sync_window. This is 10MB less than your current utilization of 256MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 1 Hrs 15 Min 44 Sec. System Info: Tower2 unRAID version 6.2.0-rc4 md_num_stripes=4480 md_sync_window=2048 md_sync_thresh=2000 nr_requests=128 (Global Setting) sbNumDisks=14 CPU: Intel(R) Celeron(R) CPU G540 @ 2.50GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description =================================================== pci@0000:02:00.0 scsi1 storage SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] scsi@1:0.3.0 /dev/sdk disk 3TB WDC WD30EZRX-00D scsi@1:0.4.0 /dev/sdl disk 3TB WDC WD30EZRX-00D scsi@1:0.5.0 /dev/sdm disk 4TB WDC WD40EZRZ-00W scsi@1:0.6.0 /dev/sdn disk 4TB WDC WD40EZRZ-00W scsi@1:0.7.0 /dev/sdo disk 3TB WDC WD30EZRX-00S scsi@1:0.0.0 /dev/sdh disk 3TB WDC WD30EZRX-00D scsi@1:0.1.0 /dev/sdi disk 4TB WDC WD40EZRZ-00W scsi@1:0.2.0 /dev/sdj disk 3TB WDC WD30EZRX-00D pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.1 scsi0 storage scsi@0:0.0.0 /dev/sda disk 7862MB DT Micro /dev/sda disk 7862MB scsi2 storage scsi@2:0.0.0 /dev/sdb disk 4TB WDC WD40EZRZ-00W scsi3 storage scsi@3:0.0.0 /dev/sdc disk 4TB WDC WD40EZRZ-00W scsi4 storage scsi@4:0.0.0 /dev/sdd disk 3TB WDC WD30EFRX-68A scsi5 storage scsi@5:0.0.0 /dev/sde disk 3TB WDC WD30EFRX-68A scsi6 storage scsi@6:0.0.0 /dev/sdf disk 3TB WDC WD30EFRX-68A scsi7 storage scsi@7:0.0.0 /dev/sdg disk 3TB WDC WD30EZRX-00D Array Devices: Disk0 sdb is a Parity drive named parity Disk1 sde is a Data drive named disk1 Disk2 sdd is a Data drive named disk2 Disk3 sdf is a Data drive named disk3 Disk4 sdo is a Data drive named disk4 Disk5 sdn is a Data drive named disk5 Disk6 sdm is a Data drive named disk6 Disk7 sdl is a Data drive named disk7 Disk8 sdg is a Data drive named disk8 Disk9 sdk is a Data drive named disk9 Disk10 sdj is a Data drive named disk10 Disk11 sdh is a Data drive named disk11 Disk12 sdi is a Data drive named disk12 Disk29 sdc is a Parity drive named parity2 Outputting free low memory information... total used free shared buff/cache available Mem: 8152944 333440 7339040 409776 480464 7184620 Low: 8152944 813904 7339040 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***

Tower1 - same exact hardware as tower6, except all 22 disks are 2TB, controllers: SAS2LP + SASLP + 1430SA + Intel PCH: unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 13:58:25 BST 2016 Run on server: Tower Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4224, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdf nr_requests=8 sdg nr_requests=8 sdh nr_requests=8 sdi nr_requests=8 sdj nr_requests=8 sdk nr_requests=8 sdr nr_requests=8 sds nr_requests=8 sdu nr_requests=8 sdt nr_requests=8 sdw nr_requests=8 sdv nr_requests=8 sdc nr_requests=8 sdq nr_requests=8 sdb nr_requests=8 sdp nr_requests=8 sdo nr_requests=8 sdm nr_requests=8 sdn nr_requests=8 sde nr_requests=8 sdd nr_requests=8 sdl nr_requests=8 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 373 | 4224 | 2048 | 8 | 2000 | 86.5 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 46.8 MB/s 2 | 1536 | 768 | 128 | 384 | 63.6 MB/s 3 | 1536 | 768 | 8 | 767 | 69.5 MB/s 4 | 1536 | 768 | 8 | 384 | 68.7 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 69.5 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 67 | 768 | 384 | 8 | 383 | 44.2 MB/s 1b | 67 | 768 | 384 | 8 | 192 | 35.4 MB/s 2a | 79 | 896 | 448 | 8 | 447 | 49.4 MB/s 2b | 79 | 896 | 448 | 8 | 224 | 26.1 MB/s 3a | 90 | 1024 | 512 | 8 | 511 | 56.3 MB/s 3b | 90 | 1024 | 512 | 8 | 256 | 37.0 MB/s 4a | 101 | 1152 | 576 | 8 | 575 | 61.3 MB/s 4b | 101 | 1152 | 576 | 8 | 288 | 55.3 MB/s 5a | 113 | 1280 | 640 | 8 | 639 | 63.9 MB/s 5b | 113 | 1280 | 640 | 8 | 320 | 59.9 MB/s 6a | 124 | 1408 | 704 | 8 | 703 | 60.3 MB/s 6b | 124 | 1408 | 704 | 8 | 352 | 68.9 MB/s 7a | 135 | 1536 | 768 | 8 | 767 | 61.5 MB/s 7b | 135 | 1536 | 768 | 8 | 384 | 60.0 MB/s 8a | 147 | 1664 | 832 | 8 | 831 | 62.9 MB/s 8b | 147 | 1664 | 832 | 8 | 416 | 42.6 MB/s 9a | 158 | 1792 | 896 | 8 | 895 | 61.3 MB/s 9b | 158 | 1792 | 896 | 8 | 448 | 62.3 MB/s 10a | 169 | 1920 | 960 | 8 | 959 | 63.9 MB/s 10b | 169 | 1920 | 960 | 8 | 480 | 64.5 MB/s 11a | 181 | 2048 | 1024 | 8 | 1023 | 77.9 MB/s 11b | 181 | 2048 | 1024 | 8 | 512 | 62.7 MB/s 12a | 192 | 2176 | 1088 | 8 | 1087 | 72.7 MB/s 12b | 192 | 2176 | 1088 | 8 | 544 | 66.4 MB/s 13a | 203 | 2304 | 1152 | 8 | 1151 | 68.0 MB/s 13b | 203 | 2304 | 1152 | 8 | 576 | 81.9 MB/s --- FULLY AUTOMATIC TEST PASS 1c (Rough - 18 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 215 | 2432 | 1216 | 8 | 1215 | 56.7 MB/s 1b | 215 | 2432 | 1216 | 8 | 608 | 74.9 MB/s 2a | 226 | 2560 | 1280 | 8 | 1279 | 81.2 MB/s 2b | 226 | 2560 | 1280 | 8 | 640 | 74.6 MB/s 3a | 237 | 2688 | 1344 | 8 | 1343 | 81.4 MB/s 3b | 237 | 2688 | 1344 | 8 | 672 | 76.0 MB/s 4a | 249 | 2816 | 1408 | 8 | 1407 | 81.6 MB/s 4b | 249 | 2816 | 1408 | 8 | 704 | 77.9 MB/s 5a | 260 | 2944 | 1472 | 8 | 1471 | 80.7 MB/s 5b | 260 | 2944 | 1472 | 8 | 736 | 79.7 MB/s 6a | 271 | 3072 | 1536 | 8 | 1535 | 83.3 MB/s 6b | 271 | 3072 | 1536 | 8 | 768 | 80.7 MB/s 7a | 283 | 3200 | 1600 | 8 | 1599 | 67.8 MB/s 7b | 283 | 3200 | 1600 | 8 | 800 | 85.4 MB/s 8a | 294 | 3328 | 1664 | 8 | 1663 | 83.2 MB/s 8b | 294 | 3328 | 1664 | 8 | 832 | 82.7 MB/s 9a | 305 | 3456 | 1728 | 8 | 1727 | 88.2 MB/s 9b | 305 | 3456 | 1728 | 8 | 864 | 86.7 MB/s 10a | 317 | 3584 | 1792 | 8 | 1791 | 89.7 MB/s 10b | 317 | 3584 | 1792 | 8 | 896 | 88.8 MB/s 11a | 328 | 3712 | 1856 | 8 | 1855 | 91.4 MB/s 11b | 328 | 3712 | 1856 | 8 | 928 | 88.4 MB/s 12a | 339 | 3840 | 1920 | 8 | 1919 | 90.7 MB/s 12b | 339 | 3840 | 1920 | 8 | 960 | 90.7 MB/s 13a | 350 | 3968 | 1984 | 8 | 1983 | 81.7 MB/s 13b | 350 | 3968 | 1984 | 8 | 992 | 91.7 MB/s 14a | 362 | 4096 | 2048 | 8 | 2047 | 89.4 MB/s 14b | 362 | 4096 | 2048 | 8 | 1024 | 83.3 MB/s 15a | 373 | 4224 | 2112 | 8 | 2111 | 88.1 MB/s 15b | 373 | 4224 | 2112 | 8 | 1056 | 89.1 MB/s 16a | 384 | 4352 | 2176 | 8 | 2175 | 84.6 MB/s 16b | 384 | 4352 | 2176 | 8 | 1088 | 83.4 MB/s 17a | 396 | 4480 | 2240 | 8 | 2239 | 87.9 MB/s 17b | 396 | 4480 | 2240 | 8 | 1120 | 84.6 MB/s 18a | 407 | 4608 | 2304 | 8 | 2303 | 87.7 MB/s 18b | 407 | 4608 | 2304 | 8 | 1152 | 64.7 MB/s --- Targeting Fastest Result of md_sync_window 1984 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 3968 | 1984 | 128 | 1983 | 76.0 MB/s 2 | 3968 | 1984 | 128 | 992 | 83.3 MB/s 3 | 3968 | 1984 | 8 | 1983 | 90.2 MB/s 4 | 3968 | 1984 | 8 | 992 | 89.5 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 90.2 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 328 | 3712 | 1856 | 8 | 1855 | 84.6 MB/s 1b | 328 | 3712 | 1856 | 8 | 928 | 92.3 MB/s 2a | 329 | 3728 | 1864 | 8 | 1863 | 87.0 MB/s 2b | 329 | 3728 | 1864 | 8 | 932 | 56.7 MB/s 3a | 331 | 3744 | 1872 | 8 | 1871 | 83.6 MB/s 3b | 331 | 3744 | 1872 | 8 | 936 | 83.7 MB/s 4a | 332 | 3760 | 1880 | 8 | 1879 | 85.3 MB/s 4b | 332 | 3760 | 1880 | 8 | 940 | 82.8 MB/s 5a | 334 | 3776 | 1888 | 8 | 1887 | 76.3 MB/s 5b | 334 | 3776 | 1888 | 8 | 944 | 79.8 MB/s 6a | 335 | 3792 | 1896 | 8 | 1895 | 79.2 MB/s 6b | 335 | 3792 | 1896 | 8 | 948 | 76.8 MB/s 7a | 336 | 3808 | 1904 | 8 | 1903 | 76.8 MB/s 7b | 336 | 3808 | 1904 | 8 | 952 | 77.5 MB/s 8a | 338 | 3824 | 1912 | 8 | 1911 | 72.7 MB/s 8b | 338 | 3824 | 1912 | 8 | 956 | 88.5 MB/s 9a | 339 | 3840 | 1920 | 8 | 1919 | 88.7 MB/s 9b | 339 | 3840 | 1920 | 8 | 960 | 89.2 MB/s 10a | 341 | 3856 | 1928 | 8 | 1927 | 89.9 MB/s 10b | 341 | 3856 | 1928 | 8 | 964 | 92.4 MB/s 11a | 342 | 3872 | 1936 | 8 | 1935 | 89.9 MB/s 11b | 342 | 3872 | 1936 | 8 | 968 | 96.1 MB/s 12a | 343 | 3888 | 1944 | 8 | 1943 | 90.0 MB/s 12b | 343 | 3888 | 1944 | 8 | 972 | 93.7 MB/s 13a | 345 | 3904 | 1952 | 8 | 1951 | 87.4 MB/s 13b | 345 | 3904 | 1952 | 8 | 976 | 95.2 MB/s 14a | 346 | 3920 | 1960 | 8 | 1959 | 60.2 MB/s 14b | 346 | 3920 | 1960 | 8 | 980 | 103.0 MB/s 15a | 348 | 3936 | 1968 | 8 | 1967 | 84.2 MB/s 15b | 348 | 3936 | 1968 | 8 | 984 | 88.0 MB/s 16a | 349 | 3952 | 1976 | 8 | 1975 | 89.5 MB/s 16b | 349 | 3952 | 1976 | 8 | 988 | 84.5 MB/s 17a | 350 | 3968 | 1984 | 8 | 1983 | 90.0 MB/s 17b | 350 | 3968 | 1984 | 8 | 992 | 89.7 MB/s 18a | 352 | 3984 | 1992 | 8 | 1991 | 88.5 MB/s 18b | 352 | 3984 | 1992 | 8 | 996 | 84.4 MB/s 19a | 353 | 4000 | 2000 | 8 | 1999 | 78.9 MB/s 19b | 353 | 4000 | 2000 | 8 | 1000 | 85.9 MB/s 20a | 355 | 4016 | 2008 | 8 | 2007 | 72.1 MB/s 20b | 355 | 4016 | 2008 | 8 | 1004 | 85.7 MB/s 21a | 356 | 4032 | 2016 | 8 | 2015 | 88.8 MB/s 21b | 356 | 4032 | 2016 | 8 | 1008 | 88.3 MB/s 22a | 358 | 4048 | 2024 | 8 | 2023 | 84.9 MB/s 22b | 358 | 4048 | 2024 | 8 | 1012 | 82.4 MB/s 23a | 359 | 4064 | 2032 | 8 | 2031 | 85.4 MB/s 23b | 359 | 4064 | 2032 | 8 | 1016 | 88.0 MB/s 24a | 360 | 4080 | 2040 | 8 | 2039 | 88.4 MB/s 24b | 360 | 4080 | 2040 | 8 | 1020 | 73.8 MB/s 25a | 362 | 4096 | 2048 | 8 | 2047 | 78.8 MB/s 25b | 362 | 4096 | 2048 | 8 | 1024 | 89.5 MB/s 26a | 363 | 4112 | 2056 | 8 | 2055 | 89.6 MB/s 26b | 363 | 4112 | 2056 | 8 | 1028 | 90.1 MB/s 27a | 365 | 4128 | 2064 | 8 | 2063 | 87.2 MB/s 27b | 365 | 4128 | 2064 | 8 | 1032 | 89.2 MB/s 28a | 366 | 4144 | 2072 | 8 | 2071 | 89.2 MB/s 28b | 366 | 4144 | 2072 | 8 | 1036 | 85.9 MB/s 29a | 367 | 4160 | 2080 | 8 | 2079 | 90.2 MB/s 29b | 367 | 4160 | 2080 | 8 | 1040 | 83.9 MB/s 30a | 369 | 4176 | 2088 | 8 | 2087 | 87.2 MB/s 30b | 369 | 4176 | 2088 | 8 | 1044 | 57.7 MB/s 31a | 370 | 4192 | 2096 | 8 | 2095 | 91.7 MB/s 31b | 370 | 4192 | 2096 | 8 | 1048 | 85.0 MB/s 32a | 372 | 4208 | 2104 | 8 | 2103 | 86.2 MB/s 32b | 372 | 4208 | 2104 | 8 | 1052 | 84.7 MB/s 33a | 373 | 4224 | 2112 | 8 | 2111 | 88.8 MB/s 33b | 373 | 4224 | 2112 | 8 | 1056 | 88.1 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=1960 at 103.0 MB/s Tunable (md_num_stripes): 3920 Tunable (md_sync_window): 1960 Tunable (md_sync_thresh): 980 Tunable (nr_requests): 8 This will consume 346 MB with md_num_stripes=3920, 2x md_sync_window. This is 27MB less than your current utilization of 373MB. The Thriftiest Sync Speed tested was md_sync_window=1960 at 103.0 MB/s Tunable (md_num_stripes): 3920 Tunable (md_sync_window): 1960 Tunable (md_sync_thresh): 980 Tunable (nr_requests): 8 This will consume 346 MB with md_num_stripes=3920, 2x md_sync_window. This is 27MB less than your current utilization of 373MB. The Recommended Sync Speed is md_sync_window=1960 at 103.0 MB/s Tunable (md_num_stripes): 3920 Tunable (md_sync_window): 1960 Tunable (md_sync_thresh): 980 Tunable (nr_requests): 8 This will consume 346 MB with md_num_stripes=3920, 2x md_sync_window. This is 27MB less than your current utilization of 373MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 1 Hrs 14 Min 55 Sec. System Info: Tower unRAID version 6.2.0-rc4 md_num_stripes=4224 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=22 CPU: Intel(R) Pentium(R) CPU G2030 @ 3.00GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description =================================================== pci@0000:01:00.0 scsi2 storage 88SE9485 SAS/SATA 6Gb/s controller scsi@2:0.0.0 /dev/sdl disk 2TB WDC WD20EZRX-00D scsi@2:0.1.0 /dev/sdm disk 2TB WDC WD20EZRX-00D scsi@2:0.2.0 /dev/sdn disk 2TB WDC WD20EZRX-00D scsi@2:0.3.0 /dev/sdo disk 2TB WDC WD20EZRX-00D scsi@2:0.4.0 /dev/sdp disk 2TB WDC WD20EZRX-00D scsi@2:0.5.0 /dev/sdq disk 2TB SAMSUNG HD204UI scsi@2:0.6.0 /dev/sdr disk 2TB SAMSUNG HD204UI scsi@2:0.7.0 /dev/sds disk 2TB SAMSUNG HD204UI pci@0000:02:00.0 scsi12 storage MV64460/64461/64462 System Controller, Revision B scsi@12:0.0.0 /dev/sdt disk 2TB SAMSUNG HD204UI scsi@12:0.1.0 /dev/sdu disk 2TB SAMSUNG HD204UI scsi@12:0.2.0 /dev/sdv disk 2TB WDC WD20EZRX-00D scsi@12:0.3.0 /dev/sdw disk 2TB WDC WD20EZRX-00D pci@0000:03:00.0 storage Serial ATA II RAID 1430SA pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.1 scsi0 storage scsi@0:0.0.0 /dev/sda disk 999MB USB Flash Memory /dev/sda disk 999MB scsi1 storage scsi@1:0.0.0 /dev/sdb disk 2TB SAMSUNG HD204UI scsi11 storage scsi@11:0.0.0 /dev/sdk disk 2TB WDC WD20EZRX-00D scsi3 storage scsi@3:0.0.0 /dev/sdc disk 2TB SAMSUNG HD204UI scsi4 storage scsi@4:0.0.0 /dev/sdd disk 2TB SAMSUNG HD204UI scsi5 storage scsi@5:0.0.0 /dev/sde disk 2TB SAMSUNG HD204UI scsi6 storage scsi@6:0.0.0 /dev/sdf disk 2TB WDC WD20EZRX-00D scsi7 storage scsi@7:0.0.0 /dev/sdg disk 2TB SAMSUNG HD204UI scsi8 storage scsi@8:0.0.0 /dev/sdh disk 2TB SAMSUNG HD204UI scsi9 storage scsi@9:0.0.0 /dev/sdi disk 2TB WDC WD20EZRX-00D scsi10 storage scsi@10:0.0.0 /dev/sdj disk 2TB SAMSUNG HD204UI Array Devices: Disk0 sdf is a Parity drive named parity Disk1 sdg is a Data drive named disk1 Disk2 sdh is a Data drive named disk2 Disk3 sdi is a Data drive named disk3 Disk4 sdj is a Data drive named disk4 Disk5 sdk is a Data drive named disk5 Disk6 sdr is a Data drive named disk6 Disk7 sds is a Data drive named disk7 Disk8 sdu is a Data drive named disk8 Disk9 sdt is a Data drive named disk9 Disk10 sdw is a Data drive named disk10 Disk11 sdv is a Data drive named disk11 Disk12 sdc is a Data drive named disk12 Disk13 sdq is a Data drive named disk13 Disk14 sdb is a Data drive named disk14 Disk15 sdp is a Data drive named disk15 Disk16 sdo is a Data drive named disk16 Disk17 sdm is a Data drive named disk17 Disk18 sdn is a Data drive named disk18 Disk19 sde is a Data drive named disk19 Disk20 sdd is a Data drive named disk20 Disk29 sdl is a Parity drive named parity2 Outputting free low memory information... total used free shared buff/cache available Mem: 8152960 442176 7221704 406488 489080 7070936 Low: 8152960 931256 7221704 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***

Yes, 4 disks. Probably due to the SAS2LP, it works OK with either nr_requests=8 or md_sync_thresh/2, in fact both these tunables were in response to some users, including myself, having terrible performance with it before.

Tower6 - 22HDDs (2&3TB) - SAS2LP +SASLP (using 4 ports only due to limited bandwidth) + Adaptec 1430SA + Intel PCH unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 10:36:23 BST 2016 Run on server: Tower6 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4480, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdf nr_requests=8 sdg nr_requests=8 sdi nr_requests=8 sdh nr_requests=8 sdk nr_requests=8 sdj nr_requests=8 sdv nr_requests=8 sdw nr_requests=8 sdt nr_requests=8 sdu nr_requests=8 sdr nr_requests=8 sdq nr_requests=8 sds nr_requests=8 sdb nr_requests=8 sdc nr_requests=8 sdp nr_requests=8 sdl nr_requests=8 sdo nr_requests=8 sdn nr_requests=8 sde nr_requests=8 sdd nr_requests=8 sdm nr_requests=8 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 396 | 4480 | 2048 | 8 | 2000 | 114.2 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 36.0 MB/s 2 | 1536 | 768 | 128 | 384 | 75.9 MB/s 3 | 1536 | 768 | 8 | 767 | 97.1 MB/s 4 | 1536 | 768 | 8 | 384 | 92.8 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 97.1 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 67 | 768 | 384 | 8 | 383 | 66.3 MB/s 1b | 67 | 768 | 384 | 8 | 192 | 46.6 MB/s 2a | 79 | 896 | 448 | 8 | 447 | 67.4 MB/s 2b | 79 | 896 | 448 | 8 | 224 | 46.9 MB/s 3a | 90 | 1024 | 512 | 8 | 511 | 74.5 MB/s 3b | 90 | 1024 | 512 | 8 | 256 | 63.8 MB/s 4a | 101 | 1152 | 576 | 8 | 575 | 76.2 MB/s 4b | 101 | 1152 | 576 | 8 | 288 | 74.6 MB/s 5a | 113 | 1280 | 640 | 8 | 639 | 95.6 MB/s 5b | 113 | 1280 | 640 | 8 | 320 | 80.6 MB/s 6a | 124 | 1408 | 704 | 8 | 703 | 95.3 MB/s 6b | 124 | 1408 | 704 | 8 | 352 | 87.7 MB/s 7a | 135 | 1536 | 768 | 8 | 767 | 96.7 MB/s 7b | 135 | 1536 | 768 | 8 | 384 | 89.4 MB/s 8a | 147 | 1664 | 832 | 8 | 831 | 82.8 MB/s 8b | 147 | 1664 | 832 | 8 | 416 | 88.9 MB/s 9a | 158 | 1792 | 896 | 8 | 895 | 108.7 MB/s 9b | 158 | 1792 | 896 | 8 | 448 | 98.8 MB/s 10a | 169 | 1920 | 960 | 8 | 959 | 107.2 MB/s 10b | 169 | 1920 | 960 | 8 | 480 | 100.4 MB/s 11a | 181 | 2048 | 1024 | 8 | 1023 | 104.6 MB/s 11b | 181 | 2048 | 1024 | 8 | 512 | 99.3 MB/s 12a | 192 | 2176 | 1088 | 8 | 1087 | 100.6 MB/s 12b | 192 | 2176 | 1088 | 8 | 544 | 98.9 MB/s 13a | 203 | 2304 | 1152 | 8 | 1151 | 109.3 MB/s 13b | 203 | 2304 | 1152 | 8 | 576 | 71.0 MB/s --- FULLY AUTOMATIC TEST PASS 1c (Rough - 18 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 215 | 2432 | 1216 | 8 | 1215 | 96.5 MB/s 1b | 215 | 2432 | 1216 | 8 | 608 | 104.8 MB/s 2a | 226 | 2560 | 1280 | 8 | 1279 | 108.4 MB/s 2b | 226 | 2560 | 1280 | 8 | 640 | 101.9 MB/s 3a | 237 | 2688 | 1344 | 8 | 1343 | 108.6 MB/s 3b | 237 | 2688 | 1344 | 8 | 672 | 106.1 MB/s 4a | 249 | 2816 | 1408 | 8 | 1407 | 112.9 MB/s 4b | 249 | 2816 | 1408 | 8 | 704 | 100.9 MB/s 5a | 260 | 2944 | 1472 | 8 | 1471 | 105.9 MB/s 5b | 260 | 2944 | 1472 | 8 | 736 | 108.2 MB/s 6a | 271 | 3072 | 1536 | 8 | 1535 | 83.9 MB/s 6b | 271 | 3072 | 1536 | 8 | 768 | 104.0 MB/s 7a | 283 | 3200 | 1600 | 8 | 1599 | 116.8 MB/s 7b | 283 | 3200 | 1600 | 8 | 800 | 99.3 MB/s 8a | 294 | 3328 | 1664 | 8 | 1663 | 104.7 MB/s 8b | 294 | 3328 | 1664 | 8 | 832 | 112.3 MB/s 9a | 305 | 3456 | 1728 | 8 | 1727 | 108.6 MB/s 9b | 305 | 3456 | 1728 | 8 | 864 | 106.7 MB/s 10a | 317 | 3584 | 1792 | 8 | 1791 | 113.4 MB/s 10b | 317 | 3584 | 1792 | 8 | 896 | 108.6 MB/s 11a | 328 | 3712 | 1856 | 8 | 1855 | 103.2 MB/s 11b | 328 | 3712 | 1856 | 8 | 928 | 107.5 MB/s 12a | 339 | 3840 | 1920 | 8 | 1919 | 80.4 MB/s 12b | 339 | 3840 | 1920 | 8 | 960 | 99.0 MB/s 13a | 350 | 3968 | 1984 | 8 | 1983 | 105.4 MB/s 13b | 350 | 3968 | 1984 | 8 | 992 | 108.8 MB/s 14a | 362 | 4096 | 2048 | 8 | 2047 | 107.4 MB/s 14b | 362 | 4096 | 2048 | 8 | 1024 | 104.5 MB/s 15a | 373 | 4224 | 2112 | 8 | 2111 | 110.0 MB/s 15b | 373 | 4224 | 2112 | 8 | 1056 | 103.3 MB/s 16a | 384 | 4352 | 2176 | 8 | 2175 | 106.7 MB/s 16b | 384 | 4352 | 2176 | 8 | 1088 | 112.1 MB/s 17a | 396 | 4480 | 2240 | 8 | 2239 | 118.4 MB/s 17b | 396 | 4480 | 2240 | 8 | 1120 | 83.6 MB/s 18a | 407 | 4608 | 2304 | 8 | 2303 | 114.7 MB/s 18b | 407 | 4608 | 2304 | 8 | 1152 | 112.4 MB/s --- Targeting Fastest Result of md_sync_window 2240 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 4480 | 2240 | 128 | 2239 | 42.9 MB/s 2 | 4480 | 2240 | 128 | 1120 | 118.9 MB/s 3 | 4480 | 2240 | 8 | 2239 | 113.9 MB/s 4 | 4480 | 2240 | 8 | 1120 | 111.3 MB/s Fastest vals were nr_reqs=128 and sync_thresh=50% of sync_window at 118.9 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 373 | 4224 | 2112 | 128 | 2111 | 43.2 MB/s 1b | 373 | 4224 | 2112 | 128 | 1056 | 107.1 MB/s 2a | 375 | 4240 | 2120 | 128 | 2119 | 49.2 MB/s 2b | 375 | 4240 | 2120 | 128 | 1060 | 119.5 MB/s 3a | 376 | 4256 | 2128 | 128 | 2127 | 47.3 MB/s 3b | 376 | 4256 | 2128 | 128 | 1064 | 119.1 MB/s 4a | 377 | 4272 | 2136 | 128 | 2135 | 43.2 MB/s 4b | 377 | 4272 | 2136 | 128 | 1068 | 114.3 MB/s 5a | 379 | 4288 | 2144 | 128 | 2143 | 41.1 MB/s 5b | 379 | 4288 | 2144 | 128 | 1072 | 117.1 MB/s 6a | 380 | 4304 | 2152 | 128 | 2151 | 36.6 MB/s 6b | 380 | 4304 | 2152 | 128 | 1076 | 109.7 MB/s 7a | 382 | 4320 | 2160 | 128 | 2159 | 36.7 MB/s 7b | 382 | 4320 | 2160 | 128 | 1080 | 119.3 MB/s 8a | 383 | 4336 | 2168 | 128 | 2167 | 36.4 MB/s 8b | 383 | 4336 | 2168 | 128 | 1084 | 110.8 MB/s 9a | 384 | 4352 | 2176 | 128 | 2175 | 35.1 MB/s 9b | 384 | 4352 | 2176 | 128 | 1088 | 115.7 MB/s 10a | 386 | 4368 | 2184 | 128 | 2183 | 44.5 MB/s 10b | 386 | 4368 | 2184 | 128 | 1092 | 119.9 MB/s 11a | 387 | 4384 | 2192 | 128 | 2191 | 36.8 MB/s 11b | 387 | 4384 | 2192 | 128 | 1096 | 85.0 MB/s 12a | 389 | 4400 | 2200 | 128 | 2199 | 36.3 MB/s 12b | 389 | 4400 | 2200 | 128 | 1100 | 108.5 MB/s 13a | 390 | 4416 | 2208 | 128 | 2207 | 44.6 MB/s 13b | 390 | 4416 | 2208 | 128 | 1104 | 117.5 MB/s 14a | 392 | 4432 | 2216 | 128 | 2215 | 37.2 MB/s 14b | 392 | 4432 | 2216 | 128 | 1108 | 114.1 MB/s 15a | 393 | 4448 | 2224 | 128 | 2223 | 43.7 MB/s 15b | 393 | 4448 | 2224 | 128 | 1112 | 117.7 MB/s 16a | 394 | 4464 | 2232 | 128 | 2231 | 40.5 MB/s 16b | 394 | 4464 | 2232 | 128 | 1116 | 117.7 MB/s 17a | 396 | 4480 | 2240 | 128 | 2239 | 46.9 MB/s 17b | 396 | 4480 | 2240 | 128 | 1120 | 110.0 MB/s 18a | 397 | 4496 | 2248 | 128 | 2247 | 41.3 MB/s 18b | 397 | 4496 | 2248 | 128 | 1124 | 118.7 MB/s 19a | 399 | 4512 | 2256 | 128 | 2255 | 42.0 MB/s 19b | 399 | 4512 | 2256 | 128 | 1128 | 117.9 MB/s 20a | 400 | 4528 | 2264 | 128 | 2263 | 35.5 MB/s 20b | 400 | 4528 | 2264 | 128 | 1132 | 119.6 MB/s 21a | 401 | 4544 | 2272 | 128 | 2271 | 42.9 MB/s 21b | 401 | 4544 | 2272 | 128 | 1136 | 116.1 MB/s 22a | 403 | 4560 | 2280 | 128 | 2279 | 35.7 MB/s 22b | 403 | 4560 | 2280 | 128 | 1140 | 84.6 MB/s 23a | 404 | 4576 | 2288 | 128 | 2287 | 50.1 MB/s 23b | 404 | 4576 | 2288 | 128 | 1144 | 115.1 MB/s 24a | 406 | 4592 | 2296 | 128 | 2295 | 36.3 MB/s 24b | 406 | 4592 | 2296 | 128 | 1148 | 119.0 MB/s 25a | 407 | 4608 | 2304 | 128 | 2303 | 44.8 MB/s 25b | 407 | 4608 | 2304 | 128 | 1152 | 118.8 MB/s 26a | 409 | 4624 | 2312 | 128 | 2311 | 34.9 MB/s 26b | 409 | 4624 | 2312 | 128 | 1156 | 117.8 MB/s 27a | 410 | 4640 | 2320 | 128 | 2319 | 41.9 MB/s 27b | 410 | 4640 | 2320 | 128 | 1160 | 118.9 MB/s 28a | 411 | 4656 | 2328 | 128 | 2327 | 44.2 MB/s 28b | 411 | 4656 | 2328 | 128 | 1164 | 113.5 MB/s 29a | 413 | 4672 | 2336 | 128 | 2335 | 41.3 MB/s 29b | 413 | 4672 | 2336 | 128 | 1168 | 116.0 MB/s 30a | 414 | 4688 | 2344 | 128 | 2343 | 38.0 MB/s 30b | 414 | 4688 | 2344 | 128 | 1172 | 116.5 MB/s 31a | 416 | 4704 | 2352 | 128 | 2351 | 39.3 MB/s 31b | 416 | 4704 | 2352 | 128 | 1176 | 115.5 MB/s 32a | 417 | 4720 | 2360 | 128 | 2359 | 39.6 MB/s 32b | 417 | 4720 | 2360 | 128 | 1180 | 118.9 MB/s 33a | 418 | 4736 | 2368 | 128 | 2367 | 39.8 MB/s 33b | 418 | 4736 | 2368 | 128 | 1184 | 106.4 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=2184 at 119.9 MB/s Tunable (md_num_stripes): 4368 Tunable (md_sync_window): 2184 Tunable (md_sync_thresh): 1092 Tunable (nr_requests): 128 This will consume 386 MB with md_num_stripes=4368, 2x md_sync_window. This is 10MB less than your current utilization of 396MB. The Thriftiest Sync Speed tested was md_sync_window=2120 at 119.5 MB/s Tunable (md_num_stripes): 4240 Tunable (md_sync_window): 2120 Tunable (md_sync_thresh): 1060 Tunable (nr_requests): 128 This will consume 375 MB with md_num_stripes=4240, 2x md_sync_window. This is 21MB less than your current utilization of 396MB. The Recommended Sync Speed is md_sync_window=2120 at 119.5 MB/s Tunable (md_num_stripes): 4240 Tunable (md_sync_window): 2120 Tunable (md_sync_thresh): 1060 Tunable (nr_requests): 128 This will consume 375 MB with md_num_stripes=4240, 2x md_sync_window. This is 21MB less than your current utilization of 396MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 1 Hrs 17 Min 44 Sec. System Info: Tower6 unRAID version 6.2.0-rc4 md_num_stripes=4480 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=22 CPU: Intel(R) Pentium(R) CPU G2030 @ 3.00GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description =================================================== pci@0000:01:00.0 scsi3 storage 88SE9485 SAS/SATA 6Gb/s controller scsi@3:0.0.0 /dev/sdl disk 3TB WDC WD30EZRX-00D scsi@3:0.1.0 /dev/sdm disk 3TB WDC WD30EZRX-00D scsi@3:0.2.0 /dev/sdn disk 3TB WDC WD30EZRX-00D scsi@3:0.3.0 /dev/sdo disk 3TB WDC WD30EZRX-22D scsi@3:0.4.0 /dev/sdp disk 2TB WDC WD20EZRX-00D scsi@3:0.5.0 /dev/sdq disk 2TB SAMSUNG HD204UI scsi@3:0.6.0 /dev/sdr disk 2TB WDC WD20EZRX-00D scsi@3:0.7.0 /dev/sds disk 2TB WDC WD20EZRX-22D pci@0000:02:00.0 scsi12 storage MV64460/64461/64462 System Controller, Revision B scsi@12:0.0.0 /dev/sdt disk 2TB SAMSUNG HD204UI scsi@12:0.1.0 /dev/sdu disk 2TB WDC WD20EZRX-00D scsi@12:0.2.0 /dev/sdv disk 2TB SAMSUNG HD204UI scsi@12:0.3.0 /dev/sdw disk 2TB SAMSUNG HD204UI pci@0000:03:00.0 storage Serial ATA II RAID 1430SA pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.1 scsi0 storage scsi@0:0.0.0 /dev/sda disk 1021MB DataTraveler 2.0 /dev/sda disk 1021MB scsi1 storage scsi@1:0.0.0 /dev/sdb disk 2TB WDC WD20EZRX-00D scsi11 storage scsi@11:0.0.0 /dev/sdk disk 2TB SAMSUNG HD204UI scsi2 storage scsi@2:0.0.0 /dev/sdc disk 2TB WDC WD20EZRX-00D scsi4 storage scsi@4:0.0.0 /dev/sdd disk 3TB TOSHIBA DT01ABA3 scsi5 storage scsi@5:0.0.0 /dev/sde disk 3TB TOSHIBA DT01ABA3 scsi6 storage scsi@6:0.0.0 /dev/sdf disk 3TB WDC WD30EZRX-00D scsi7 storage scsi@7:0.0.0 /dev/sdg disk 3TB WDC WD30EFRX-68A scsi8 storage scsi@8:0.0.0 /dev/sdh disk 3TB TOSHIBA DT01ABA3 scsi9 storage scsi@9:0.0.0 /dev/sdi disk 2TB SAMSUNG HD204UI scsi10 storage scsi@10:0.0.0 /dev/sdj disk 2TB SAMSUNG HD204UI Array Devices: Disk0 sdf is a Parity drive named parity Disk1 sdg is a Data drive named disk1 Disk2 sdi is a Data drive named disk2 Disk3 sdh is a Data drive named disk3 Disk4 sdk is a Data drive named disk4 Disk5 sdj is a Data drive named disk5 Disk6 sdv is a Data drive named disk6 Disk7 sdw is a Data drive named disk7 Disk8 sdt is a Data drive named disk8 Disk9 sdu is a Data drive named disk9 Disk10 sdr is a Data drive named disk10 Disk11 sdq is a Data drive named disk11 Disk12 sds is a Data drive named disk12 Disk13 sdb is a Data drive named disk13 Disk14 sdc is a Data drive named disk14 Disk15 sdp is a Data drive named disk15 Disk16 sdl is a Data drive named disk16 Disk17 sdo is a Data drive named disk17 Disk18 sdn is a Data drive named disk18 Disk19 sde is a Data drive named disk19 Disk20 sdd is a Data drive named disk20 Disk29 sdm is a Parity drive named parity2 Outputting free low memory information... total used free shared buff/cache available Mem: 8152960 473152 7180712 408920 499096 7032760 Low: 8152960 972248 7180712 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***

Tower5 - SSD server - LSI9207 (with Intel RES2SV240) + LSI9211 (flashed H310) + Intel PCH unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 06:31:47 BST 2016 Run on server: Tower5 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4480, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdh nr_requests=8 sdj nr_requests=8 sdk nr_requests=8 sdl nr_requests=8 sdm nr_requests=8 sdn nr_requests=8 sdo nr_requests=8 sdp nr_requests=8 sdq nr_requests=8 sdr nr_requests=8 sds nr_requests=8 sdt nr_requests=8 sdu nr_requests=8 sdv nr_requests=8 sdw nr_requests=8 sdc nr_requests=8 sdb nr_requests=8 sde nr_requests=8 sdf nr_requests=8 sdg nr_requests=8 sdd nr_requests=8 sdad nr_requests=8 sdac nr_requests=8 sdx nr_requests=8 sdae nr_requests=8 sdab nr_requests=8 sdaa nr_requests=8 sdz nr_requests=8 sdy nr_requests=8 sdi nr_requests=8 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 536 | 4480 | 2048 | 8 | 2000 | 204.0 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 156.6 MB/s 2 | 1536 | 768 | 128 | 384 | 146.1 MB/s 3 | 1536 | 768 | 8 | 767 | 155.9 MB/s 4 | 1536 | 768 | 8 | 384 | 146.6 MB/s Fastest vals were nr_reqs=128 and sync_thresh=99% of sync_window at 156.6 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 91 | 768 | 384 | 128 | 383 | 147.3 MB/s 1b | 91 | 768 | 384 | 128 | 192 | 128.0 MB/s 2a | 107 | 896 | 448 | 128 | 447 | 153.3 MB/s 2b | 107 | 896 | 448 | 128 | 224 | 131.8 MB/s 3a | 122 | 1024 | 512 | 128 | 511 | 157.7 MB/s 3b | 122 | 1024 | 512 | 128 | 256 | 129.6 MB/s 4a | 137 | 1152 | 576 | 128 | 575 | 145.6 MB/s 4b | 137 | 1152 | 576 | 128 | 288 | 140.8 MB/s 5a | 153 | 1280 | 640 | 128 | 639 | 148.3 MB/s 5b | 153 | 1280 | 640 | 128 | 320 | 139.5 MB/s 6a | 168 | 1408 | 704 | 128 | 703 | 147.8 MB/s 6b | 168 | 1408 | 704 | 128 | 352 | 137.1 MB/s 7a | 183 | 1536 | 768 | 128 | 767 | 150.0 MB/s 7b | 183 | 1536 | 768 | 128 | 384 | 133.0 MB/s 8a | 199 | 1664 | 832 | 128 | 831 | 142.7 MB/s 8b | 199 | 1664 | 832 | 128 | 416 | 139.0 MB/s 9a | 214 | 1792 | 896 | 128 | 895 | 138.4 MB/s 9b | 214 | 1792 | 896 | 128 | 448 | 142.9 MB/s 10a | 229 | 1920 | 960 | 128 | 959 | 138.9 MB/s 10b | 229 | 1920 | 960 | 128 | 480 | 145.9 MB/s 11a | 245 | 2048 | 1024 | 128 | 1023 | 138.2 MB/s 11b | 245 | 2048 | 1024 | 128 | 512 | 140.9 MB/s 12a | 260 | 2176 | 1088 | 128 | 1087 | 133.7 MB/s 12b | 260 | 2176 | 1088 | 128 | 544 | 142.0 MB/s 13a | 275 | 2304 | 1152 | 128 | 1151 | 139.7 MB/s 13b | 275 | 2304 | 1152 | 128 | 576 | 139.6 MB/s --- Targeting Fastest Result of md_sync_window 512 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1024 | 512 | 128 | 511 | 141.2 MB/s 2 | 1024 | 512 | 128 | 256 | 122.9 MB/s 3 | 1024 | 512 | 8 | 511 | 143.2 MB/s 4 | 1024 | 512 | 8 | 256 | 117.7 MB/s Fastest vals were nr_reqs=8 and sync_thresh=99% of sync_window at 143.2 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 91 | 768 | 384 | 8 | 383 | 111.2 MB/s 1b | 91 | 768 | 384 | 8 | 192 | 112.7 MB/s 2a | 93 | 784 | 392 | 8 | 391 | 115.2 MB/s 2b | 93 | 784 | 392 | 8 | 196 | 88.6 MB/s 3a | 95 | 800 | 400 | 8 | 399 | 56.2 MB/s 3b | 95 | 800 | 400 | 8 | 200 | 84.9 MB/s 4a | 97 | 816 | 408 | 8 | 407 | 101.6 MB/s 4b | 97 | 816 | 408 | 8 | 204 | 100.9 MB/s 5a | 99 | 832 | 416 | 8 | 415 | 121.4 MB/s 5b | 99 | 832 | 416 | 8 | 208 | 110.3 MB/s 6a | 101 | 848 | 424 | 8 | 423 | 126.4 MB/s 6b | 101 | 848 | 424 | 8 | 212 | 113.3 MB/s 7a | 103 | 864 | 432 | 8 | 431 | 135.9 MB/s 7b | 103 | 864 | 432 | 8 | 216 | 114.7 MB/s 8a | 105 | 880 | 440 | 8 | 439 | 134.5 MB/s 8b | 105 | 880 | 440 | 8 | 220 | 120.2 MB/s 9a | 107 | 896 | 448 | 8 | 447 | 139.0 MB/s 9b | 107 | 896 | 448 | 8 | 224 | 120.9 MB/s 10a | 109 | 912 | 456 | 8 | 455 | 134.5 MB/s 10b | 109 | 912 | 456 | 8 | 228 | 117.1 MB/s 11a | 111 | 928 | 464 | 8 | 463 | 127.9 MB/s 11b | 111 | 928 | 464 | 8 | 232 | 117.1 MB/s 12a | 113 | 944 | 472 | 8 | 471 | 128.8 MB/s 12b | 113 | 944 | 472 | 8 | 236 | 112.9 MB/s 13a | 114 | 960 | 480 | 8 | 479 | 130.4 MB/s 13b | 114 | 960 | 480 | 8 | 240 | 113.9 MB/s 14a | 116 | 976 | 488 | 8 | 487 | 136.9 MB/s 14b | 116 | 976 | 488 | 8 | 244 | 112.1 MB/s 15a | 118 | 992 | 496 | 8 | 495 | 131.4 MB/s 15b | 118 | 992 | 496 | 8 | 248 | 101.0 MB/s 16a | 120 | 1008 | 504 | 8 | 503 | 112.9 MB/s 16b | 120 | 1008 | 504 | 8 | 252 | 111.3 MB/s 17a | 122 | 1024 | 512 | 8 | 511 | 117.6 MB/s 17b | 122 | 1024 | 512 | 8 | 256 | 112.0 MB/s 18a | 124 | 1040 | 520 | 8 | 519 | 97.9 MB/s 18b | 124 | 1040 | 520 | 8 | 260 | 87.4 MB/s 19a | 126 | 1056 | 528 | 8 | 527 | 97.2 MB/s 19b | 126 | 1056 | 528 | 8 | 264 | 84.6 MB/s 20a | 128 | 1072 | 536 | 8 | 535 | 98.8 MB/s 20b | 128 | 1072 | 536 | 8 | 268 | 80.9 MB/s 21a | 130 | 1088 | 544 | 8 | 543 | 94.1 MB/s 21b | 130 | 1088 | 544 | 8 | 272 | 73.5 MB/s 22a | 132 | 1104 | 552 | 8 | 551 | 78.1 MB/s 22b | 132 | 1104 | 552 | 8 | 276 | 47.2 MB/s 23a | 134 | 1120 | 560 | 8 | 559 | 87.4 MB/s 23b | 134 | 1120 | 560 | 8 | 280 | 80.6 MB/s 24a | 135 | 1136 | 568 | 8 | 567 | 102.1 MB/s 24b | 135 | 1136 | 568 | 8 | 284 | 99.8 MB/s 25a | 137 | 1152 | 576 | 8 | 575 | 110.7 MB/s 25b | 137 | 1152 | 576 | 8 | 288 | 103.8 MB/s 26a | 139 | 1168 | 584 | 8 | 583 | 127.6 MB/s 26b | 139 | 1168 | 584 | 8 | 292 | 108.4 MB/s 27a | 141 | 1184 | 592 | 8 | 591 | 113.4 MB/s 27b | 141 | 1184 | 592 | 8 | 296 | 112.1 MB/s 28a | 143 | 1200 | 600 | 8 | 599 | 119.6 MB/s 28b | 143 | 1200 | 600 | 8 | 300 | 116.0 MB/s 29a | 145 | 1216 | 608 | 8 | 607 | 126.0 MB/s 29b | 145 | 1216 | 608 | 8 | 304 | 116.6 MB/s 30a | 147 | 1232 | 616 | 8 | 615 | 131.9 MB/s 30b | 147 | 1232 | 616 | 8 | 308 | 112.2 MB/s 31a | 149 | 1248 | 624 | 8 | 623 | 134.7 MB/s 31b | 149 | 1248 | 624 | 8 | 312 | 119.8 MB/s 32a | 151 | 1264 | 632 | 8 | 631 | 124.7 MB/s 32b | 151 | 1264 | 632 | 8 | 316 | 115.5 MB/s 33a | 153 | 1280 | 640 | 8 | 639 | 115.0 MB/s 33b | 153 | 1280 | 640 | 8 | 320 | 114.6 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=768 at 150.0 MB/s Tunable (md_num_stripes): 1536 Tunable (md_sync_window): 768 Tunable (md_sync_thresh): 767 Tunable (nr_requests): 8 This will consume 183 MB with md_num_stripes=1536, 2x md_sync_window. This is 353MB less than your current utilization of 536MB. The Thriftiest Sync Speed tested was md_sync_window=704 at 147.8 MB/s Tunable (md_num_stripes): 1408 Tunable (md_sync_window): 704 Tunable (md_sync_thresh): 703 Tunable (nr_requests): 8 This will consume 168 MB with md_num_stripes=1408, 2x md_sync_window. This is 368MB less than your current utilization of 536MB. The Recommended Sync Speed is md_sync_window=768 at 150.0 MB/s Tunable (md_num_stripes): 1536 Tunable (md_sync_window): 768 Tunable (md_sync_thresh): 767 Tunable (nr_requests): 8 This will consume 183 MB with md_num_stripes=1536, 2x md_sync_window. This is 353MB less than your current utilization of 536MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 0 Hrs 53 Min 51 Sec. System Info: Tower5 unRAID version 6.2.0-rc4 md_num_stripes=4480 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=30 CPU: Intel(R) Pentium(R) CPU G4400 @ 3.30GHz RAM: 8GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description ======================================================== pci@0000:01:00.0 scsi1 Storage SAS2308 PCI-Express Fusion-MPT SAS-2 scsi@1:0.3.0 /dev/sdk Disk 256GB TS256GSSD370S scsi@1:0.4.0 /dev/sdl Disk 64GB TS64GSSD370S scsi@1:0.5.0 /dev/sdm Disk 64GB TS64GSSD370S scsi@1:0.6.0 /dev/sdn Disk 64GB TS64GSSD370S scsi@1:0.7.0 /dev/sdo Disk 64GB TS64GSSD370S scsi@1:0.8.0 /dev/sdp Disk 64GB TS64GSSD370S scsi@1:0.9.0 /dev/sdq Disk 64GB TS64GSSD370S scsi@1:0.10.0 /dev/sdr Disk 64GB TS64GSSD370S scsi@1:0.11.0 /dev/sds Disk 64GB TS64GSSD370S scsi@1:0.12.0 /dev/sdt Disk 120GB GOODRAM scsi@1:0.13.0 /dev/sdu Disk 120GB GOODRAM scsi@1:0.14.0 /dev/sdv Disk 120GB GOODRAM scsi@1:0.15.0 /dev/sdw Disk 120GB GOODRAM scsi@1:0.0.0 /dev/sdh Disk 256GB TS256GSSD370S scsi@1:0.1.0 /dev/sdi Disk 256GB TS256GSSD370S scsi@1:0.2.0 /dev/sdj Disk 256GB TS256GSSD370S pci@0000:02:00.0 scsi8 Storage SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] scsi@8:0.0.0 /dev/sdx Disk 120GB GOODRAM scsi@8:0.1.0 /dev/sdy Disk 64GB SAMSUNG SSD 830 scsi@8:0.2.0 /dev/sdz Disk 64GB SAMSUNG SSD 830 scsi@8:0.3.0 /dev/sdaa Disk 120GB Samsung SSD 840 scsi@8:0.4.0 /dev/sdab Disk 120GB Samsung SSD 840 scsi@8:0.5.0 /dev/sdac Disk 120GB GOODRAM scsi@8:0.6.0 /dev/sdad Disk 120GB SanDisk SDSSDA12 scsi@8:0.7.0 /dev/sdae Disk 120GB Samsung SSD 840 pci@0000:00:17.0 Storage Sunrise Point-H SATA controller [AHCI mode] pci@0000:06:00.0 Storage NVMe SSD Controller usb@1:8 scsi0 Storage scsi@0:0.0.0 /dev/sda Disk 15GB DataTraveler 2.0 /dev/sda Disk 15GB scsi2 Storage scsi@2:0.0.0 /dev/sdb Disk 120GB GOODRAM scsi3 Storage scsi@3:0.0.0 /dev/sdc Disk 120GB GOODRAM scsi4 Storage scsi@4:0.0.0 /dev/sdd Disk 80GB INTEL SSDSA2CW08 scsi5 Storage scsi@5:0.0.0 /dev/sde Disk 80GB INTEL SSDSA2CW08 scsi6 Storage scsi@6:0.0.0 /dev/sdf Disk 80GB INTEL SSDSA2CW08 scsi7 Storage scsi@7:0.0.0 /dev/sdg Disk 80GB INTEL SSDSA2CW08 Array Devices: Disk0 sdh is a Parity drive named parity Disk1 sdj is a Data drive named disk1 Disk2 sdk is a Data drive named disk2 Disk3 sdl is a Data drive named disk3 Disk4 sdm is a Data drive named disk4 Disk5 sdn is a Data drive named disk5 Disk6 sdo is a Data drive named disk6 Disk7 sdp is a Data drive named disk7 Disk8 sdq is a Data drive named disk8 Disk9 sdr is a Data drive named disk9 Disk10 sds is a Data drive named disk10 Disk11 sdt is a Data drive named disk11 Disk12 sdu is a Data drive named disk12 Disk13 sdv is a Data drive named disk13 Disk14 sdw is a Data drive named disk14 Disk15 sdc is a Data drive named disk15 Disk16 sdb is a Data drive named disk16 Disk17 sde is a Data drive named disk17 Disk18 sdf is a Data drive named disk18 Disk19 sdg is a Data drive named disk19 Disk20 sdd is a Data drive named disk20 Disk21 sdad is a Data drive named disk21 Disk22 sdac is a Data drive named disk22 Disk23 sdx is a Data drive named disk23 Disk24 sdae is a Data drive named disk24 Disk25 sdab is a Data drive named disk25 Disk26 sdaa is a Data drive named disk26 Disk27 sdz is a Data drive named disk27 Disk28 sdy is a Data drive named disk28 Disk29 sdi is a Parity drive named parity2 Outputting free low memory information... total used free shared buff/cache available Mem: 7865860 681308 6765900 351460 418652 6601976 Low: 7865860 1099960 6765900 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT *** I know this is just the quick test but since parity check is very fast on this server I tried with the fastest values found: With my previous settings: Description: Duration: 19 minutes, 8 seconds. Average speed: 223.0 MB/s New settings after the quick test: Description: Duration: 22 minutes, 7 seconds. Average speed: 193.0 MB/s I'll try again with the normal tests, but probably not before the weekend.

My first results: Tower7 - 5 x 3TB - All onboard intel PCH sata: unRAID Tunables Tester v4.0b2 by Pauven (for unRAID v6.2) Tunables Report produced Thu Aug 25 06:24:48 BST 2016 Run on server: Tower7 Short Automatic Parity Sync Test NOTE: Use the smallest set of values that produce good results. Larger values increase server memory use, and may cause stability issues with unRAID, especially if you have any add-ons or plug-ins installed. Current Values: md_num_stripes=4096, md_sync_window=2048, md_sync_thresh=2000 Global nr_requests=8 sdc nr_requests=128 sdd nr_requests=128 sde nr_requests=128 sdf nr_requests=128 sdg nr_requests=128 --- INITIAL BASELINE TEST OF CURRENT VALUES (1 Sample Point @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1 | 106 | 4096 | 2048 | 8 | 2000 | 158.6 MB/s --- FULLY AUTOMATIC nr_requests TEST 1 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1536 | 768 | 128 | 767 | 171.7 MB/s 2 | 1536 | 768 | 128 | 384 | 160.0 MB/s 3 | 1536 | 768 | 8 | 767 | 170.4 MB/s 4 | 1536 | 768 | 8 | 384 | 174.7 MB/s Fastest vals were nr_reqs=8 and sync_thresh=50% of sync_window at 174.7 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 1a (Rough - 13 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 19 | 768 | 384 | 8 | 383 | 161.8 MB/s 1b | 19 | 768 | 384 | 8 | 192 | 165.1 MB/s 2a | 23 | 896 | 448 | 8 | 447 | 158.7 MB/s 2b | 23 | 896 | 448 | 8 | 224 | 165.1 MB/s 3a | 26 | 1024 | 512 | 8 | 511 | 156.2 MB/s 3b | 26 | 1024 | 512 | 8 | 256 | 157.2 MB/s 4a | 29 | 1152 | 576 | 8 | 575 | 142.8 MB/s 4b | 29 | 1152 | 576 | 8 | 288 | 170.4 MB/s 5a | 33 | 1280 | 640 | 8 | 639 | 155.6 MB/s 5b | 33 | 1280 | 640 | 8 | 320 | 159.4 MB/s 6a | 36 | 1408 | 704 | 8 | 703 | 154.0 MB/s 6b | 36 | 1408 | 704 | 8 | 352 | 160.6 MB/s 7a | 39 | 1536 | 768 | 8 | 767 | 152.7 MB/s 7b | 39 | 1536 | 768 | 8 | 384 | 160.6 MB/s 8a | 43 | 1664 | 832 | 8 | 831 | 152.7 MB/s 8b | 43 | 1664 | 832 | 8 | 416 | 159.7 MB/s 9a | 46 | 1792 | 896 | 8 | 895 | 130.7 MB/s 9b | 46 | 1792 | 896 | 8 | 448 | 157.8 MB/s 10a | 49 | 1920 | 960 | 8 | 959 | 151.0 MB/s 10b | 49 | 1920 | 960 | 8 | 480 | 157.2 MB/s 11a | 53 | 2048 | 1024 | 8 | 1023 | 148.2 MB/s 11b | 53 | 2048 | 1024 | 8 | 512 | 156.2 MB/s 12a | 56 | 2176 | 1088 | 8 | 1087 | 148.0 MB/s 12b | 56 | 2176 | 1088 | 8 | 544 | 155.4 MB/s 13a | 59 | 2304 | 1152 | 8 | 1151 | 150.5 MB/s 13b | 59 | 2304 | 1152 | 8 | 576 | 157.3 MB/s --- Targeting Fastest Result of md_sync_window 576 bytes for Final Pass --- --- FULLY AUTOMATIC nr_requests TEST 2 (4 Sample Points @ 60sec Duration)--- Test | num_stripes | sync_window | nr_requests | sync_thresh | Speed --------------------------------------------------------------------------- 1 | 1152 | 576 | 128 | 575 | 162.0 MB/s 2 | 1152 | 576 | 128 | 288 | 160.9 MB/s 3 | 1152 | 576 | 8 | 575 | 173.0 MB/s 4 | 1152 | 576 | 8 | 288 | 175.2 MB/s Fastest vals were nr_reqs=8 and sync_thresh=50% of sync_window at 175.2 MB/s This nr_requests value will be used for the next test. --- FULLY AUTOMATIC TEST PASS 2 (Fine - 33 Sample Points @ 30sec Duration)--- Test | RAM | num_stripes | sync_window | nr_reqs | sync_thresh | Speed ----------------------------------------------------------------------------- 1a | 23 | 896 | 448 | 8 | 447 | 159.4 MB/s 1b | 23 | 896 | 448 | 8 | 224 | 164.1 MB/s 2a | 23 | 912 | 456 | 8 | 455 | 131.3 MB/s 2b | 23 | 912 | 456 | 8 | 228 | 162.6 MB/s 3a | 24 | 928 | 464 | 8 | 463 | 159.7 MB/s 3b | 24 | 928 | 464 | 8 | 232 | 164.1 MB/s 4a | 24 | 944 | 472 | 8 | 471 | 166.7 MB/s 4b | 24 | 944 | 472 | 8 | 236 | 162.2 MB/s 5a | 24 | 960 | 480 | 8 | 479 | 159.6 MB/s 5b | 24 | 960 | 480 | 8 | 240 | 162.0 MB/s 6a | 25 | 976 | 488 | 8 | 487 | 159.0 MB/s 6b | 25 | 976 | 488 | 8 | 244 | 163.3 MB/s 7a | 25 | 992 | 496 | 8 | 495 | 133.2 MB/s 7b | 25 | 992 | 496 | 8 | 248 | 163.1 MB/s 8a | 26 | 1008 | 504 | 8 | 503 | 157.8 MB/s 8b | 26 | 1008 | 504 | 8 | 252 | 162.7 MB/s 9a | 26 | 1024 | 512 | 8 | 511 | 137.2 MB/s 9b | 26 | 1024 | 512 | 8 | 256 | 163.2 MB/s 10a | 26 | 1040 | 520 | 8 | 519 | 144.1 MB/s 10b | 26 | 1040 | 520 | 8 | 260 | 162.4 MB/s 11a | 27 | 1056 | 528 | 8 | 527 | 155.6 MB/s 11b | 27 | 1056 | 528 | 8 | 264 | 161.0 MB/s 12a | 27 | 1072 | 536 | 8 | 535 | 130.5 MB/s 12b | 27 | 1072 | 536 | 8 | 268 | 163.5 MB/s 13a | 28 | 1088 | 544 | 8 | 543 | 154.6 MB/s 13b | 28 | 1088 | 544 | 8 | 272 | 161.0 MB/s 14a | 28 | 1104 | 552 | 8 | 551 | 155.0 MB/s 14b | 28 | 1104 | 552 | 8 | 276 | 161.2 MB/s 15a | 29 | 1120 | 560 | 8 | 559 | 123.6 MB/s 15b | 29 | 1120 | 560 | 8 | 280 | 161.6 MB/s 16a | 29 | 1136 | 568 | 8 | 567 | 155.3 MB/s 16b | 29 | 1136 | 568 | 8 | 284 | 161.4 MB/s 17a | 29 | 1152 | 576 | 8 | 575 | 151.3 MB/s 17b | 29 | 1152 | 576 | 8 | 288 | 165.8 MB/s 18a | 30 | 1168 | 584 | 8 | 583 | 154.4 MB/s 18b | 30 | 1168 | 584 | 8 | 292 | 161.0 MB/s 19a | 30 | 1184 | 592 | 8 | 591 | 155.9 MB/s 19b | 30 | 1184 | 592 | 8 | 296 | 162.4 MB/s 20a | 31 | 1200 | 600 | 8 | 599 | 155.9 MB/s 20b | 31 | 1200 | 600 | 8 | 300 | 161.2 MB/s 21a | 31 | 1216 | 608 | 8 | 607 | 125.6 MB/s 21b | 31 | 1216 | 608 | 8 | 304 | 161.2 MB/s 22a | 31 | 1232 | 616 | 8 | 615 | 149.8 MB/s 22b | 31 | 1232 | 616 | 8 | 308 | 161.2 MB/s 23a | 32 | 1248 | 624 | 8 | 623 | 158.8 MB/s 23b | 32 | 1248 | 624 | 8 | 312 | 159.3 MB/s 24a | 32 | 1264 | 632 | 8 | 631 | 156.5 MB/s 24b | 32 | 1264 | 632 | 8 | 316 | 161.1 MB/s 25a | 33 | 1280 | 640 | 8 | 639 | 155.2 MB/s 25b | 33 | 1280 | 640 | 8 | 320 | 161.1 MB/s 26a | 33 | 1296 | 648 | 8 | 647 | 154.6 MB/s 26b | 33 | 1296 | 648 | 8 | 324 | 160.0 MB/s 27a | 34 | 1312 | 656 | 8 | 655 | 120.8 MB/s 27b | 34 | 1312 | 656 | 8 | 328 | 162.7 MB/s 28a | 34 | 1328 | 664 | 8 | 663 | 156.3 MB/s 28b | 34 | 1328 | 664 | 8 | 332 | 159.8 MB/s 29a | 34 | 1344 | 672 | 8 | 671 | 159.9 MB/s 29b | 34 | 1344 | 672 | 8 | 336 | 159.5 MB/s 30a | 35 | 1360 | 680 | 8 | 679 | 152.4 MB/s 30b | 35 | 1360 | 680 | 8 | 340 | 157.8 MB/s 31a | 35 | 1376 | 688 | 8 | 687 | 155.9 MB/s 31b | 35 | 1376 | 688 | 8 | 344 | 159.8 MB/s 32a | 36 | 1392 | 696 | 8 | 695 | 149.0 MB/s 32b | 36 | 1392 | 696 | 8 | 348 | 140.2 MB/s 33a | 36 | 1408 | 704 | 8 | 703 | 121.7 MB/s 33b | 36 | 1408 | 704 | 8 | 352 | 158.8 MB/s The results below do NOT include the Basline test of current values. The Fastest Sync Speed tested was md_sync_window=472 at 166.7 MB/s Tunable (md_num_stripes): 944 Tunable (md_sync_window): 472 Tunable (md_sync_thresh): 471 Tunable (nr_requests): 8 This will consume 24 MB with md_num_stripes=944, 2x md_sync_window. This is 82MB less than your current utilization of 106MB. The Thriftiest Sync Speed tested was md_sync_window=384 at 161.8 MB/s Tunable (md_num_stripes): 768 Tunable (md_sync_window): 384 Tunable (md_sync_thresh): 383 Tunable (nr_requests): 8 This will consume 19 MB with md_num_stripes=768, 2x md_sync_window. This is 87MB less than your current utilization of 106MB. The Recommended Sync Speed is md_sync_window=472 at 166.7 MB/s Tunable (md_num_stripes): 944 Tunable (md_sync_window): 472 Tunable (md_sync_thresh): 471 Tunable (nr_requests): 8 This will consume 24 MB with md_num_stripes=944, 2x md_sync_window. This is 82MB less than your current utilization of 106MB. NOTE: Adding additional drives will increase memory consumption. In unRAID, go to Settings > Disk Settings to set your chosen parameter values. Completed: 0 Hrs 54 Min 55 Sec. System Info: Tower7 unRAID version 6.2.0-rc4 md_num_stripes=4096 md_sync_window=2048 md_sync_thresh=2000 nr_requests=8 (Global Setting) sbNumDisks=6 CPU: Intel(R) Xeon(R) CPU E31220 @ 3.10GHz RAM: 32GiB System Memory Outputting lshw information for Drives and Controllers: Bus info Device Class Description ===================================================== pci@0000:02:00.0 scsi1 storage ASC-1405 Unified Serial HBA scsi@1:0.1.0 /dev/sdk disk 120GB KINGSTON SV300S3 scsi@1:0.2.0 /dev/sdl disk 120GB KINGSTON SV300S3 scsi@1:0.3.0 /dev/sdm disk 120GB KINGSTON SV300S3 scsi@1:0.0.0 /dev/sdj disk 120GB KINGSTON SV300S3 pci@0000:03:00.0 storage ASM1062 Serial ATA Controller pci@0000:00:1f.2 storage 6 Series/C200 Series Chipset Family SATA AHCI Controller usb@2:1.4 scsi0 storage scsi@0:0.0.0 /dev/sda disk 7864MB DataTraveler 2.0 /dev/sda disk 7864MB scsi2 storage scsi@2:0.0.0 /dev/sdb disk 512GB TS512GSSD370S scsi3 storage scsi@3:0.0.0 /dev/sdc disk 3TB TOSHIBA DT01ACA3 scsi4 storage scsi@4:0.0.0 /dev/sdd disk 3TB TOSHIBA DT01ACA3 scsi5 storage scsi@5:0.0.0 /dev/sde disk 3TB TOSHIBA DT01ACA3 scsi6 storage scsi@6:0.0.0 /dev/sdf disk 3TB TOSHIBA DT01ACA3 scsi7 storage scsi@7:0.0.0 /dev/sdg disk 3TB TOSHIBA DT01ACA3 scsi8 storage scsi@8:0.0.0 /dev/sdh disk 180GB INTEL SSDSC2CT18 scsi9 storage scsi@9:0.0.0 /dev/sdi disk 500GB TOSHIBA MK5055GS Array Devices: Disk0 sdc is a Parity drive named parity Disk1 sdd is a Data drive named disk1 Disk2 sde is a Data drive named disk2 Disk3 sdf is a Data drive named disk3 Disk4 sdg is a Data drive named disk4 Outputting free low memory information... total used free shared buff/cache available Mem: 32991160 5328952 27049260 419436 612948 26952308 Low: 32991160 5941900 27049260 High: 0 0 0 Swap: 0 0 0 *** END OF REPORT ***