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Forum Discussion
Solved
ReadyNAS 516 cannot mount RAID volume
Good afternoon! I am trying to access data on my ReadyNAS 516, using firmware 6.10.8. It has 6 drives of 4TB each, running in a RAID 5 configuration. After a batch of storm-caused power interruptions...
Thanks to StephenB I was able to mount the volume using
mdadm --assemble --really-force /dev/md127 /dev/sd[abcdef]3and then painfully copy all folders and files onto spare external drives. I say painfully because the NAS was trying to rebuild the RAID drive while doing so, and performance was a dismay. While I am sure there is a way to safely prevent that, I did not try as data recovery was priority #1.
So now I can say that all data has been recovered, and I have ordered the disks to start brand new and build a new RAID drive to dump the restored data into. I have also ordered a large drive to make a regular backup ... just in case.
Thanks to StephenB and the community. You rock!!
adomenicus wrote:
when I SSH using the admin account and password, ...
the connection is closed.
You need to log in as root using the NAS admin password.
adomenicus wrote:
Looking at the logs it seems that volume 1 was resynced, but then there was a fault in disk 6 and as a consequence the RAID volume could not be assembled.
I am thinking that the resync might not have been fully completed (perhaps the volume was vertically expanded in the past?). Download the full log zip file, and take a look there.
If you like, I could take a look. If you are interested, put the zip into cloud storage and PM me a download link (using the envelope icon in the upper right of the forum page). Make sure the permissions are set so anyone with the link can download.
Thanks to StephenB I was able to mount the volume using
mdadm --assemble --really-force /dev/md127 /dev/sd[abcdef]3
and then painfully copy all folders and files onto spare external drives. I say painfully because the NAS was trying to rebuild the RAID drive while doing so, and performance was a dismay. While I am sure there is a way to safely prevent that, I did not try as data recovery was priority #1.
So now I can say that all data has been recovered, and I have ordered the disks to start brand new and build a new RAID drive to dump the restored data into. I have also ordered a large drive to make a regular backup ... just in case.
Thanks to StephenB and the community. You rock!!
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