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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, disk 1 failed. I replaced it with a similar one, and the system started rebuilding. The morning after, I woke up to see that the system could not mount the RAID volume. RAIDair shows the following:
The admin page shows the following:
The latest log shows the following:
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 would like to recover the data, but I am not able at this time to spend the cost of Netgear level 3 support. So I tried to ssh from my windows PC, using Putty, reassemble the array using mdadm and then mount the BTRFS volume. However, when I SSH using the admin account and password, I get the message:
Could not chdir to home directory /home/admin: No such file or directory
and the connection is closed.
I would appreciate any help you can provide to me, as DIY is as far as I see the only way to get the data back. I also understand that I should have had a backup, and I had, but I am ashamed to admit that it was not updated, at all.
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.
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.
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.
