Volume missing following crash and rebuild

[tyrrminal]

ReadyNAS NV+ v2 running RAIDiator 5.3.12

When I woke up this morning I found that my NAS was turned off. I turned it back on and it immediately started an array rebuild (4x3 TB Toshiba disks, X-RAID). While it was rebuilding, I was able to view and access files on the NAS throughout the day (the rebuild took around 14 hours).

When the rebuild completed, I tried to access my files and received errors, so I rebooted the device. Once it came back up, it no longer shows my volume from the array, although it shows all disks as healthy. I suspect/hope that the data is intact, but the device just has become unconfigured for accessing it. I have ssh access, but I need guidance for how to go about recovering this.

[StephenB]

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@tyrrminal wrote:

ReadyNAS NV+ v2 running RAIDiator 5.3.12

When I woke up this morning I found that my NAS was turned off. I turned it back on and it immediately started an array rebuild (4x3 TB Toshiba disks, X-RAID). While it was rebuilding, I was able to view and access files on the NAS throughout the day (the rebuild took around 14 hours).

When the rebuild completed, I tried to access my files and received errors, so I rebooted the device. Once it came back up, it no longer shows my volume from the array, although it shows all disks as healthy. I suspect/hope that the data is intact, but the device just has become unconfigured for accessing it. I have ssh access, but I need guidance for how to go about recovering this.

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Have you downloaded the full log zip file?  There are likely more clues in the logs.

[tyrrminal]

The Logs section of the Dashboard just says "No Logs" and the Download Logs button does nothing

[StephenB]

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@tyrrminal wrote:

I have ssh access, but I need guidance for how to go about recovering this.

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First enter

cat /proc/partitions

Check that all disks are shown.  

Check the disk health for thost disks using smartctl

smartctl -x /dev/sda
smartctl -x /dev/sdb
smartctl -x /dev/sdc
smartctl -x /dev/sdd

Look for

• errors in the smart stats (pending sectors, reallocated sectors, etc)
• failures in the SMART Extended Self-test Log section
• errors in the SMART Extended Comprehensive Error Log 

Then

cat /proc/mdstat

and see what RAID arrays are assembled.

Last try

mdadm --examine /dev/sd[a-d][3-6]

You can post back with the output of these commands.

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