darkcyde Posted February 16, 2021 Share Posted February 16, 2021 I've been running Unraid now for several years using enterprise hardware, and recently bought a new (old) server for archiving purposes which is 2 gen up on what I already had. I was expecting some major speed improvements, but in reality it's not much faster at read/write speeds. On both machines (1 x HP Proliant DL180 G6, 1 x HP Proliant DL380e G8) both running SAS 7.2k drives, on my main machine I have 2 x parity 1 x cache, 9 x SAS drives, and the array is Encrypted, and 1 x Parity, 10 x SAS drives on the archive machine, not encrypted. I have dual 1GB network cables for both machines, running in a Gigabit switch, again enterprise grade. On average I get around 80MB/s read/write speeds on an individual drive when writing to the main array on the main machine, but it can reach 1GB/s reading for parity across the entire array, so I know it's not bottlenecking apart from individual drive writes. Have I got a major issue, or have I just got a config problem? I read others getting 600MB/s or more!! Quote Link to comment
strike Posted February 16, 2021 Share Posted February 16, 2021 If you've been using unraid for several years you should know that the speed you're getting is what to expect from writing directly to an parity protected array. On an SSD cache pool on the other hand you can get much higher speeds. Quote Link to comment
darkcyde Posted February 16, 2021 Author Share Posted February 16, 2021 So if I drop the parity disk, I should get a massive speed boost? Quote Link to comment
strike Posted February 16, 2021 Share Posted February 16, 2021 No, not massive, only 125 MB/s, that is top speed for an individual disk on an gigabit network. If you don't go over the network you will get max 200-250 maybe on an 7200 rpm spindle. Quote Link to comment
frodr Posted February 26, 2021 Share Posted February 26, 2021 (edited) On 2/16/2021 at 1:00 PM, strike said: No, not massive, only 125 MB/s, that is top speed for an individual disk on an gigabit network. If you don't go over the network you will get max 200-250 maybe on an 7200 rpm spindle. New technology is needed to increase this significantly. Seagate have launched MACH.2, but no word about Linux support. Edited February 26, 2021 by frodr Quote Link to comment
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