Asking for help with "RAID level unknown" & "volume root is degraded" errors

Question

Hello, After a firmware update, my Readynas 104 is unusable. I have the following error message: "Volume data RAID level unknown" (see capture). Diagnostics revealed that a disk has "pending sectors" and when I start with 4 disks (exlcuding the one with pending sectors) I get "volume root is degraded". I know my data is intact I was able to see parts of it with ReclaiMe. But I cannot pay 200$ for the full recovery licence. My Netgear warranty is over and my data is not important enough to pay hundreds to maybe recover it. Is there any way to repair the root sector? Or at least to recover some data before doing a factoty reset (and formating)? Thanks a lot to anyone who can help me out.

StephenB · Answer

Zeixxs&nbsp;wrote:
when I start with 4 disks (exlcuding the one with pending sectors) I get "volume root is degraded".&nbsp;

I think you must mean 3 disks, since there are only four bays total in the RN104.&nbsp; Are you able to access your data when you boot the system this way?
&nbsp;
To clarify - a "degraded volume" is one that is no longer protected by RAID redundancy, but which is still accessible.&nbsp; If you are seeing "corrupt root", then that is another matter.

Zeixxs · Answer

Hello and thank you for answering.
&nbsp;
You're right, I meant 3 disks, sorry.
When I start with 4 disks I get the "disk 2 has pending sectors" and when I start with 3 disks (excluding the 2nd), I get "Volume root is degraded" and "md/raid:md127: failed to run raid set." when I use the diagnostic from RAIDAR.
&nbsp;
I cannot access my data either with 3 or 4 disks.
I get to the 1st folder level (Videos, Pictures, ... but I click I get a network error message saying windows cannot access (error code 0x80070043).

StephenB · Answer

Can you log into the NAS web UI?

Zeixxs · Answer

Yes, I can access the NAS web UI.
We I do I get the warning message : "delete the inactive volumes to use the disk. Disk 1,2,3,4".

StephenB · Answer

That means that the problem isn't with the NAS OS partition (corrupt root), it is with the data volume.
&nbsp;
There are multiple causes for this, so the best way to proceed is to contact paid Netgear support (my.netgear.com). Sometimes the solution would require data recovery, which is an expensive service (&nbsp;https://kb.netgear.com/69/ReadyNAS-Data-Recovery-Diagnostics-Scope-of-Service ).&nbsp; But it might be simpler than that.
&nbsp;
If you have a backup of your data, then another option is to do a factory default, rebuild the NAS, and then restore the data from your backup.

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Asking for help with "RAID level unknown" & "volume root is degraded" errors

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