May 3, 20224 yr Hello All, had my first disk error this morning and am looking for some advice on how to proceed. Looks like one of my disks has 1024 read errors and has been disabled. Good thing is that the data on the array still seems to be intact. I am purchasing a new drive now to replace this with, but would like some assistance investigating what exactly happened. Any help is appreciated! unraid-diagnostics-20220503-0622.zip
May 3, 20224 yr Community Expert Disk dropped offline so there's no SMART report, but the log shows issues with multiple disks, so most likely a power/connection problem, power/cycling the server should bring the disk back online, if it does post new diags.
May 3, 20224 yr Author Rebooted and I think the disk might be down for good. It's not getting picked up at all, even by my HBA card at bootup. Posting new diags. Would you mind expanding on the errors you observed with other disks? I ran short smart tests on all the drives and got new diags. No errors observed on the other drives, but going to run the extended test as well. unraid-diagnostics-20220503-0741.zip
May 3, 20224 yr Community Expert 55 minutes ago, aethl said: Rebooted That's usually not enough, hence why I mentioned power cycling the server, you can also check connections.
May 3, 20224 yr Author Sorry I should have been more specific, I did a full shutdown on the server (pulled power cables) and then powered on.
May 3, 20224 yr Community Expert OK, in that case disk is probably dead, you can swap cables with another one to be sure if you want.
May 3, 20224 yr Author Yeah I will try moving to a different slot, but I think its dead. I really appreciate the help, thank you!
May 4, 20224 yr Author Ok I was wrong, its not dead. Moved it to another slot and it picked back up again. Now its showing as a new disk. From what I understand, unraid would have dropped the disk from the array once the errors were detected. If I add it back to the array as a new disk, the parity should just rebuild it and I should be good to go right?
May 4, 20224 yr Community Expert 4 minutes ago, aethl said: If I add it back to the array as a new disk, the parity should just rebuild it and I should be good to go right? Correct, make sure the emulated disk is mounting and contents look correct, whatever is there is what's going to be rebuilt, also good idea to check SMART since we couldn't before.
May 4, 20224 yr Author Got it, SMART tests dont show any errors. I have the array in a stopped state right now, when the array was started all the data looked good and nothing was missing.
May 4, 20224 yr Community Expert If all looks good you can rebuild on top: https://wiki.unraid.net/Manual/Storage_Management#Rebuilding_a_drive_onto_itself
May 4, 20224 yr Author Ah ok cool. So I think steps 1-5 are sort of already done here since when I power-cycled the server the disk was showing as missing at the HBA level so unraid already marked it as missing/unassigned. Thanks!
May 2May 2 I had the same, with the same drive, twice, disabled because of read errors. I believe I actually moved it to a different slot to eliminate cabling issues. I was thinking of rebooting, moving a disk with no issues to a differnt empty slot and then rebuild the drive onto the slot that was occupied by the disk with no issues.Any objections?Also will run a smart test and share it before doing so.Any other suggestions welcome.
May 6May 6 Ok so moving the disk from the previous slot in the Norco S500 caddi to a different norco S500 caddy, this one fed by a Sata cable from the motherboard (the other one comes from a 8 sata port card).Will check the disk Smart report next.
May 9May 9 Notice [TOWER] - Data-Rebuild finished (0 errors)Duration: 1 day, 5 hours, 45 minutes, 18 seconds. Average speed: 74.7 MB/s
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