May 12, 20179 yr Good day! Jumping both feet into this NAS environment! Installed two MNPA19-XTR 10GB ethernet NICs last night. I used the following video for tweaks on my Windows 10 client: I no idea on how to do similar changes on the UnRaid server or even if it's necessary. Once I completed the tweaks and restarted both the server and client I was able to get a nice burst speed then it dropped like a rock. I used a Windows ISO 2.63GB file to test. The ISO is located on my desktop and I used both Windows File Manager and TerraCopy to move the file to the UnRaid Shared folder. The Windows 10 OS is on a M4-CT128M4 SSD. Is this the best I can hope to achieve or is there still more I can do to tweak the transfer speed? Sure would love to get a steady transfer speed. Let me know what information you need to see and I will post it here. Please keep in mind that I am a complete newbie, please be gentle. Thank you for your time! Have a wonderful day. Mike
May 12, 20179 yr Initial writes are cached to RAM, to get better sustained write speed after RAM cache is full you'll need a faster SSD (or better yet, more than one in RAID0/10 or an NVMe device).
May 12, 20179 yr Author So I am at my cap. Anything I can do in UnRaid to improve the performance? My current TS140 MB doest support NVMe so that's out of the question. Would it be best to purchase another Samsung 830 128GB SSD ($60 plus for a used one) or more system memory (8GB more for $56)? Looking at the performance spec for that SDD: Performance Max Sequential Read: Up to 520 MB/s Max Sequential Write: Up to 320 MB/s
May 12, 20179 yr To get close to 10GbE sustained writes with only 2 SSDs you'll need a couple of very fast SSDs in raid0, like the 500GB 850EVO, never gonna get close with 128GB SSDs. A single fast NVMe can also give good performance, If you have a free pcie x4 slot (or larger) on can use an adapter similar to this:
May 12, 20179 yr Author I didn't notice the difference in write performance in the 850 Pro line-up based on storage size. Since the write speeds and IOPS are the same from 256GB and up, couldn't I achieve the performance which I am seeking from the two Raid 0 256GB SSDs? 850 EVO 120GB Performance $87 Max Sequential Read Up to 540 MBps Max Sequential Write Up to 520 MBps 850 Pro 128GB Performance Max Sequential Read Up to 550 MBps Max Sequential Write Up to 470 MBps 850 EVO 250GB Performance $110 Max Sequential Read Up to 540 MBps Max Sequential Write Up to 520 MBps 850 Pro 256GB Performance $140 Max Sequential Read Up to 550 MBps Max Sequential Write Up to 520 MBps 850 EVO 500GB Performance $193 Max Sequential Read Up to 540 MBps Max Sequential Write Up to 520 MBps 850 Pro 512GB Performance $264 Max Sequential Read Up to 550 MBps Max Sequential Write Up to 520 MBps Edited May 13, 20179 yr by Sabot
May 12, 20179 yr I'm not familiar with the Pro models, since here the 256GB Pro costs almost the same as the 500GB Evo, but if those are sustained speeds, 2 x 256 should be enough.
May 13, 20179 yr Author Will the 4KB Random Read and 4KB Random Write significantly impact the cache performance? I noticed the max read/write speeds are similar across the EVO product line but the IOPS are slightly different. What is the least expensive SSD that I could use to get maximum performance? I like the price point of the 120GB EVO. Edited May 13, 20179 yr by Sabot
May 13, 20179 yr Author Would two 120GB EVO give me the sustained 1.12GB/s for my test transfer of the Windows ISO 2.63GB file?
May 13, 20179 yr 1 hour ago, Sabot said: Would two 120GB EVO give me the sustained 1.12GB/s for my test transfer of the Windows ISO 2.63GB file? No, EVOs have turbo write, a small SLC cache that increases write speed a lot for about 5 or 6 seconds, then it's down to normal speeds: Sequential Write With TurboWrite Without TurboWrite 120GB 520MB/s 150MB/s 250GB 520MB/s 300MB/s 500GB 520MB/s 500MB/s That's why I said before you need the 500GB model.
May 13, 20179 yr Author I kept forgetting to ask, how to I confirm that my SPF+ 10G network is being used?
May 13, 20179 yr 1 minute ago, Sabot said: I kept forgetting to ask, how to I confirm that my SPF+ 10G network is being used? On 12/05/2017 at 4:06 PM, Sabot said:
May 14, 20179 yr Author Hum... now I am thinking of using one of my expansion slots (PCIe 3.0x16) and getting an M.2 adapter along with an 850 EVO NVMe 2280. Could I get away with a single 850 EVO NVMe and have a performance jump? Any benefit for going this route vs just going with 2.5" 850 EVO? Could I get away with a single 960 EVO NVMe 2280 256GB? Noticed from Wikipedia that the PCI Express 3.0's 8 GT/s bit rate effectively delivers 985 MB/s per lane. 850 EVO 250GB $112 MZ-N5E250BW Cache - 512MB Performance Max Sequential Read Up to 540 MBps Max Sequential Write Up to 500 MBps 4KB Random Read Up to 97,000 IOPS (4KB, QD32) Up to 10,000 IOPS (4KB, QD1) 4KB Random Write Up to 89,000 IOPS (4KB, QD32) Up to 40,000 IOPS (4KB, QD1) 960 EVO 250 GB $138 MZ-V6E250BW Cache - 512MB Performance Max Sequential Read Up to 3200 MBps Max Sequential Write Up to 1500 MBps 4KB Random Read Up to 330,000 IOPS (4KB, QD32) Up to 14,000 IOPS (4KB, QD1) 4KB Random Write Up to 300,000 IOPS (4KB, QD32) Up to 50,000 IOPS (4KB, QD1) https://www.newegg.com/Product/Product.aspx?item=N82E16820147398 https://www.newegg.com/Product/Product.aspx?Item=9SIA3FA5DT8532 https://www.newegg.com/Product/Product.aspx?Item=1Z5-0018-00020&ignorebbr=1&cm_re=pcie_nvme_adapter-_-1Z5-0018-00020-_-Product https://www.amazon.com/Ableconn-PEXM2-SSD-NGFF-Express-Adapter/dp/B017JGVTAM/ref=sr_1_1?s=pc&ie=UTF8&qid=1494726349&sr=1-1&keywords=adapter&th=1 https://www.amazon.com/Ableconn-PEXM2-SSD-NGFF-Express-Adapter/dp/B01D2PXV50/ref=sr_1_1?s=pc&ie=UTF8&qid=1494726349&sr=1-1&keywords=adapter&th=1 https://www.amazon.com/Ableconn-PEXM2-SSD-NGFF-Express-Adapter/dp/B01N79SI9Q/ref=sr_1_1?s=pc&ie=UTF8&qid=1494726349&sr=1-1&keywords=adapter&th=1 Edited May 14, 20179 yr by Sabot
May 14, 20179 yr A single m.2 850 EVO no, a single 960 EVO is better but the only model that can sustain >1 GB/s after exhausting turbowrite is the 1TB version.
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