October 27, 20205 yr i have smart report. maybe it's loose cable? unraid1-smart-20201027-1200.zip Edited October 27, 20205 yr by cdoublejj
October 27, 20205 yr Community Expert Go to Tools - Diagnostics and attach the complete Diagnostics ZIP file to your NEXT post in this thread
October 27, 20205 yr Community Expert Why do you have SSDs in the parity array? Do you know they can't be written any faster than HDD parity, and they cannot be trimmed?
October 28, 20205 yr Author i checked out my server last night. i swapped drives around to see if the problem stayed or moved. it appears so far to have moved. i think i found a bad sata connector. i moved one of the SSDs from this bad connector and speeds seems to have doubled or better. well that might explain yesterdays lack luster performance and weird stats. also not being able to write to it any faster might lso add to that. HOWEVER, even with the poor performance yesterday and error i noticed my parity check/sync time was HALVED! Pre Clears which should NOT be done on SSDs go much faster than the 6tb HDDs. (a few drives failed pre clear yesterday, i initially chalked up to not being for SSDs until i found bad cable) that bad cable and my old processors were probably why i had slow speeds this hole time along with having many drives. ALSO i found one of my primary intake fans cooling the drives had up and quite, the fan connector had broken! drives seem to be cooler so far. maybe could have done experiments without going ALL SSD but, what the hey if i can find a way to do ADDITIONAL back ups might as well guinea pig. I think i'll be making thread somewhere about my unraid adventures. BEFORE with bad cable and no fan AFTER intial pre clear AFTER overnight so far much better than 80 and 90mb speeds ...for the most part, the one drive seems to be zeroing at those speeds EDIT: i either have a bad drive or another bad cable one of the drive giving me fits last night just failed a pre-read in pre clear Edited October 28, 20205 yr by cdoublejj
October 28, 20205 yr Community Expert On 10/27/2020 at 1:13 PM, trurl said: Go to Tools - Diagnostics and attach the complete Diagnostics ZIP file to your NEXT post in this thread Diagnostics contains SMART for all attached drives and many other things that tell a lot more about your situation. Might even give an idea what you mean by "fail".
October 28, 20205 yr Author 13 minutes ago, trurl said: Diagnostics contains SMART for all attached drives and many other things that tell a lot more about your situation. Might even give an idea what you mean by "fail". the other drives are not done "cooking" 🤣 unraid1-diagnostics-20201028-1253.zip
October 28, 20205 yr Community Expert 5 hours ago, cdoublejj said: Pre Clears which should NOT be done on SSDs Why are you then?
October 28, 20205 yr Author 59 minutes ago, trurl said: Why are you then? i am able to ascertain drive some sort of benchmark in this case we can see, PreReads has nearly doubled in speed after moving a drive from a bad cable. I do not do dockers or VMs on unraid so this my only other option.
October 29, 20205 yr Author is this normal for the parity on fresh brand new array after it just starts the parity sync?
October 29, 20205 yr Author looks like around 7 drives is the limit before speeds drop quite bit. 6 or less seems to boost speeds. as Constructor mentioned in another thread, the fewer the drives the faster.
October 29, 20205 yr Community Expert Hey "Advanced Member", I am guessing by "Constructor", you mean me. 12 minutes ago, cdoublejj said: as Constructor mentioned in another thread, the fewer the drives the faster. I don't recall ever saying that. I often advocate for fewer larger disks rather than more smaller disks because each additional disk is an additional point of failure. Ideally, parity operations happen in parallel. If your hardware can't support accessing all disks simultaneously, it will be slower. Do you have a port multiplier?
October 29, 20205 yr Author 1 hour ago, trurl said: Hey "Advanced Member", I am guessing by "Constructor", you mean me. I don't recall ever saying that. I often advocate for fewer larger disks rather than more smaller disks because each additional disk is an additional point of failure. Ideally, parity operations happen in parallel. If your hardware can't support accessing all disks simultaneously, it will be slower. Do you have a port multiplier? OH! 🤣 is there a way to see such hardware in unraid? i have some raid/HBA type devices. what ever was recommended on unraid at the time and they were flashed to IT mode with whatever firmware there was at the time. did some reading maybe i should move parity drive off the same controller(s) if possible
October 30, 20205 yr Community Expert You can run the diskspeed docker to test controller(s) aggregate speed.
October 30, 20205 yr Author docker service failed to start, trying a reboot. will have to revisit Edited October 30, 20205 yr by cdoublejj
October 30, 20205 yr Author not sure it's benching all drives? EDIT: looks like maybe 3x Dell H310s flashed in IT mode.[SAS2008 PCI-Express Fusion-MPT SAS-2] they crammed full up and 2 drives of the main motherboard. maybe i need some new controllers? running some benches Edited October 30, 20205 yr by cdoublejj
November 2, 20205 yr Author should i consider adding more or upgrading to newer hard drive controllers? is there a newer suggested standard now?
November 2, 20205 yr Community Expert See here for some benchmarks on the possible performance with various controllers, of course board/CPU are also a factor, i.e. a PCIe 3.0 HBA will only perform optimally with a PCIe 3.0 board/CPU.
November 2, 20205 yr Author 4 hours ago, JorgeB said: See here for some benchmarks on the possible performance with various controllers, of course board/CPU are also a factor, i.e. a PCIe 3.0 HBA will only perform optimally with a PCIe 3.0 board/CPU. Wow! outstanding work sir! you're documentation says i should be getting higher speeds. Even more so interesting!!! ....you also so results with speeds i am seeing with PCIe 2.0 x4. one may be familiar with PCIe bandwith limiting/ when multi cards are installed in a motherboard. Yet my board's documentation states no such limits with multiple cards installed yet with my PCIe 2.0 x8 slots i see YOUR PCIe 2.0 x4 speeds.... i wonder if it's time to slap in a cheap ryzen and ditch the dual socket 1366??? https://www.supermicro.com/products/motherboard/QPI/5500/X8DT6-F.cfm at the very least i see your bottom 2 controllers are great performers and the LSI 9207-8i PCIe gen3 x8 seems quite affordable but, i do lack the PCIe 3.0 slots all together. QUESTION: Must the unRAID flash drive be re-imaged or can i swap motherboards with no recourse or is it installed from an iso to the flash drive? (wow it's been so long i can't remember)
November 2, 20205 yr Community Expert 11 minutes ago, cdoublejj said: Must the unRAID flash drive be re-imaged or can i swap motherboards Usually it's plug'n play.
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