I added my 12th drive to my unraid array a few days ago. As it began to pre-clear another fairly newer drive, showed a red ball, failing, contents emulated. When I clicked on the drive itself, it was being reported as a size of 600 Pedabytes or some crazy high number. I suspected it may be a failing of the PSU to keep all the drives powered, so I allowed it to finish the pre-clear, stopped the array, powered down the machine, checked all my SATA and power connections, removed the new pre-cleared drive, and powered back up the machine. I got an email saying :

Event: unRAID array errors

Subject: Notice [TOWER] - array turned good

Description: Array has 0 disks with read errors

Importance: normal

But I still have a red X next to the drive, even though now when I click into the drive, the size is reported properly and the SMART status reports as "passed".

I think the drive is fine, but unraid refuses to see this drive as such. How should I proceed? I have another larger, already pre-cleared drive, but I don't think the problem is the drive, as much as the PSU wasn't giving sufficient power to the array in general.

After a disk is disabled it has to be rebuilt, to a new one or the the old one if you think it's good.

 

You should at least look at the SMART report for the failed disk before rebuilding, SMART status is not enough.

I am rebuilding it on the same disk now, because I suppose the question would be, why wouldn't I? I have another larger, already pre-cleared disk just waiting to drop into my array so I'm going to give it a shot and if it fails then I'll rebuild to the new one. I did do a long SMART test and it's passed, no reallocated sectors, although it's "old age" and "pre-fail" are almost always present in consumer level drive SMART tests, I hope it will be alright. I believe in this case I simply need a larger PSU