February 7, 20251 yr I have an array with 2 18TB parity drives and a failed 14TB drive in the array with many other mixed sized drives in the rest of the array. Can I buy 2 20TB drives, replace the failed 18TB parity drive and then replace the failed 14TB drive in the array? Any suggestions on procedure would be helpful. I can get other sized drives, but the above scenario is best for what I want to do.
February 7, 20251 yr Community Expert Both parity drives have to be at least as large as the biggest data drive, so you would need to get both parity drives to 20TB (or larger) before you could start using 20TB drives as data drives. you could use the Parity Swap procedure to get a 20TB drives into a parity position and then use the 18TB parity drive just released to replace the failed 14TB drive.
February 7, 20251 yr Author Forgive me, one of the 18TB parity drives has also failed. So 2 drives reporting errors one 18TB Parity Drive and one 14TB array drive.
February 7, 20251 yr Community Expert After using the Parity Swap procedure mentioned above you could then do a standard rebuild of the other parity drive onto a new 20TB drive. just a thought - are you sure you have failed drives? Just because a drive gets a red ‘x’ in the Unraid GUI does not mean the drive failed - just that a write to it failed for some reason. Far more often than not this is something like a connection or power issue rather than the drive failing. If you are not sure the Extended SMART test is a good indication of a drives health.
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