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Forum Discussion
Simultaneous failure of multiple drives
Been using my ReadyNAS for several years now with no issues. 4x6TB, RAID10. Today I tried to access the volume, and it appeared as empty (no files), but it still showed that 75% of the volume was u...
chhreese wrote:
It said to remove disks 1, 2 and 4 so start using the volume.
What firmware were you running? There's no way that you can remove 3 disks from a 4 disk RAID-10 array and use the volume.
You should shut down the NAS. If you have a windows PC, you should remove the disks (labeling by slot) and then try testing them in the PC with vendor tools (Lifeguard for Western Digital, Seatools for Seagate). You can connect the disks either via SATA or with a USB dock/adapter. Windows won't recognize the format, but the vendor tools should still detect the drives.
chhreese wrote:
I'm more concerned with covering the data on the volume than getting the NAS up and running again.
Does this mean that you have no backup?
Thanks for the reply. I'm currently running 6.9.3.
Just an update to this. I powered it back on this morning, and it now shows all 4 discs in red, and the error message says "Remove inactive volumes to use the disk, Disk #1,2,3,4."
And no, I do not have a backup of this. I know there's no guarentee that an entire array won't fail, but that's why I ran a mirrored array, as this was my backup.
I think the next step is to test the drives in a windows PC as described above, and see if they are healthy. Look at the SMART stats after the tests, don't just depend on a "pass" in the diag.
Ok, so I ran the extended tests on all four drives and they all passed. So I'm assuming that means the drives are fine and it was the NAS that failed. What would you recommend for next steps?
And I checked on when I bought the NAS. It's three months out of warranty.
I think the next step is to consider Data Recovery (which will cost).
You can try Netgear's Data Recovery Service - that has the advantage that they might be able to remount the volumes fairly quickly (depending on what is wrong). One aspect is that they charge by the hour with no guaranteed results. https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service
Another option is to try ReclaiMe software on the PC. That will show you what can be recovered prior to purchase, but actually recovery is blocked until you buy the software. Once you have the data offloaded, you can rebuild the NAS (factory reset) and reload the data.
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