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Forum Discussion
ReadyNAS NV+ RND4000 v3 volume offline after failed drive replacement
Model: ReadyNAS NV+ [X-RAID] Firmware: RAIDiator 4.1.14 [1.00a043]
X-RAID with 4 2TB disks. WD Green, as shown in screenshot.
Unit of my brother-in-law. I said I would try to look into i...
I suggest testing the remaining disks with lifeguard in a Windows PC next.
I ran a quick check on disks 1, 2 and 4. And they all look ok.
SMART
Lifeguard
What could have caused the volume to go offline?
tojnk wrote:
I ran a quick check on disks 1, 2 and 4. And they all look ok.
...
What could have caused the volume to go offline?
I agree the disks look ok.
It is possible that the power failure resulted in lost writes - that can damage the file system even when the disks are good.
If he has no backup, you probably will need to look into RAID recovery. R-Studio looks fairly inexpensive (the version you'd need would cost about $79, and you can see if it can recover anything before you purchase). But you would need to connect the three good drives to a PC.
I looked into R-Studio, but was unable to get the virtual raid working. I was unsure about a number of parameters. I read the NV+ uses RAID4, but what are the block size and offset?
In the mean time I used ddrescue to make a clone of disk 3.
When I attached disks 1, 2 and the cloned 3 to the NAS the volume (disk 4 removed) the volume came online!
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