June 24, 20179 yr Hi, I want to use my 2 of 2TB SSD with the best performance. I tried to make an hardware raid0 but unraid cant see hardware raid. This is my idea: Disk 1: My 2x2TB SSD in RAID 0 Parity 1: 4TB HDD how can i do this?
June 24, 20179 yr Community Expert What do you mean by performance, exactly? Depending on your use and your other factors, network speed my keep you from realizing full performance of even a single SSD anyway.
June 24, 20179 yr Author 3 minutes ago, trurl said: What do you mean by performance, exactly? Depending on your use and your other factors, network speed my keep you from realizing full performance of even a single SSD anyway. my 2 SSD like an RAID 0 to get the double of write and read speed. so i have 4tb ssd array and i want to use an 4tb normal hdd for keeping my data safe als an parity Im gona using an 10gbit network card.
June 24, 20179 yr And if you used the SSD as the parity, write speed would be limited by the data disk (in normal unRAID write mode). But, SSDs manage space differently than hard disks, by shuffling blocks around to maintain consistent wear. As a result the values in unallocated space can change. Since unRAID tracks parity on the entire disk as a while, not just used space, parity would get broken by the SSD. I know there has been some success using them, but it is not officially supported and in theory will cause problems. SSDs in the protected unRAID arrays is not recommended at this point, as parity or data. To make use of the your SSDs, you could consider a RAID1 (redundancy) or RAID0 (no redundancy) setup, and mount it outside the array. Just make sure that the RAID technology you are using works properly with SSDs. Use this for your performance oriented needs, and use a regular unRAID array with spinning hard disks for the media collection.
June 24, 20179 yr Author is there no way to make an task to sync my 4tb ssd raid0 with an normal hdd every night?
June 24, 20179 yr Community Expert 27 minutes ago, bjp999 said: mount it outside the array. Or do a raid0 cache pool. 3 minutes ago, Adem said: is there no way to make an task to sync my 4tb ssd raid0 with an normal hdd every night? Nothing builtin, but several ways to make this happen. User Scripts plugin will let you schedule a script.
June 24, 20179 yr Community Expert No, parity in always real-time, currently the best option to have high performance SSDs with unRAID is using them in RAID 0/10 on the cache pool.
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