A client running a Dell R620 with three disks in a RAID 5 reported amber blinking light on one of the disks though the OS (ESX) was running fine. I suggested buying a replacement which was delivered complete with hot-swap tray. The client swapped out the drive, but the Amber light continued. I thought it might be tagged as Foreign, so I scheduled a visit.
When I rebooted the server, I went into the RAID controller to clear the (New) Foreign disk config and add it as hot spare so that it would begin rebuilding the RAID.
However, when I got in there the first disk (0) shows as MISSING, the New Disk (1) as Failed, and the third (2) as Online. I shut down and re-seated all of the drives, but no change.
The RAID is in a FAILED State, and with RAID 5 (which this is) you can’t rebuild if two disk fail or are unreachable.
I tried putting the old disk back into Slot 1, but now when I reboot both Disk 0 and 1 show as MISSING.
I also receive "There are offline or missing virtual drives with preserved cache. Please chack the cables and ensure that all drives are present." message.
I read some articles about re-tagging the Virtual Disk. Does this sound like a viable solution?
Any help would be appreciated.