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ReadyNas 526X "Data: dead"?
ReadyNAS 526x
Firmware: 6.9.4 Hotfix 1 (will update to latest version once all this is sorted, or I'm happily convinced I'm not going to have to do a factory default.
6 drives, all WD Reds, in X-...
Wow... So I finally got ahold of tech support, and Rene with tech support got the issue sorted out.
They actually discovered another issue with the unit.. here's the full info:
"There was some disputes on the superblock of /dev/sda so we adjusted it to sync with the other working drives. However /dev/sdb has not synced fully so I suggested to remove it from the array. Try to format /dev/sdb and hotplug it to the unit to sync again properly. Once you sync the new formatted drive, the array will be complete again and should not be degraded anymore."
Holy. Cow. My weekend is saved.
Now, then... to start this backup, before I issue a resync. :)
...
and now after rebooting the device, I'm getting 3 'data' volumes, and it's telling me to remove all of the drives.
*sigh* dunno what happened here, but wife and daughter are ready to kill me.
In reference, the final post of this thread details nearly identically what's happened, here.
Running WDs Data Lifeguard scans on the drives, right now. So far, nothing showing up.
Hi Shadowlore
It seems there are issues with the RAID configuration or with the disks that failed but I would recommend contacting NETGEAR Support so they can properly assist you with fixing the RAID. Please note though that in the event Data recovery is needed, there would be a separate charge. Also, if you are out of warranty you may have to purchase a Support contract like a Pay-per-incident contract would do ($75).
You can contact them through my.netgear.com by creating an online case.
HTH
Regards
Yeah, already looking into that route, as well as a few others.
If the drives had come back as bad, via WD, then I'd at least understand it... but the part about it I don't really get, is that the data was mostly intact (thumbnail files were reporting as bad...) so I was able to copy MOST of the data off.
Powered up another ReadyNAS unit, to start a 10Gb Backup, but wanted to move the device to a different UPS, just in case. (got some storms rolling in), and after the reboot, it seems to have forgotten it's volumes, even when I've tried to mount them in read-only.This definitely is weird. Have you grabbed the log zip file?
Did you always have 6x4TB in the unit? I'm thinking that you might have started with some smaller drives (which would give you multiple RAID groups in the array). Then something happened that put one of multiple RAID groups out of sync.
FWIW, one thing I recently discovered with my WD Reds - sometimes unrecoverable reads don't end up incrementing the pending sector counts. I found several UNCs when I ran smartctl -x on one of the drives with ssh. When I tested that drive with Lifeguard, it failed. Someone else here tried that test (at my suggestion) and also uncovered a failed drive that way.
Also, in general I've found that the destructive write-zeros test in Lifeguard sometimes finds issues that the non-destructive test misses (and vice versa). Though you shouldn't run that test until you sort out your data loss.
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