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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 used. So I logged in, and I saw a number of errors. It said to remove disks 1, 2 and 4 so start using the volume. The log also says that Disks 1 and 4 FAILED. The image of the NAS shows disks 1 and 2 in red and 3 and 4 in grey.
It also shows two volumes now (FileServer and FileServer-0). Looks like one was an attempt to recover after the first disk failure, as it was created 5 minutes after the first failure was reported.
I'm hoping that it's a failure of the device and not 3 of the 4 drives all at the same time. Does anyone have any suggestions for what my next move should be in attempt to recover the volume? I'm more concerned with covering the data on the volume than getting the NAS up and running again.
8 Replies
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.
same thing happened to me late in 2017. discs were fine. never figured out what happened. luckily I had all of the 314 backing up to a 104 so was just matter of backing up from last nightly.
always suspected it was snapshots filling stuff up and driving errors, cannot in any way prove that.
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