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Forum Discussion
Retired_Member
Sep 15, 2020RN31400: data DEAD, All drive showing NEW healthy on reboot
NAS was showing 'data Dead' on LCD on inspection after noticing that it wasn't working. Turned it off and restarted the box. Rebooted, admin suite has the notification 'Remove inactive volumes to u...
- Sep 19, 2020
I don't think the NAS retains any state on this, other than what btrfs itself retains.
What you need to do is forcibly mount the array, and perhaps also attempt to repair the file system. This isn't something I've ever needed to do, so I can't really offer much advice.
If you boot up in tech support mode, you could try
# rnutil chroot # btrfs device scan # btrfs fi show # mount -t btrfs -o ro,recovery /dev/md127 /data
If you just go into ssh with the NAS running, then you'd skip the rnutil command.
One user here successfully used that mount command to mount a missing volume. If it works then it will mount the volume read-only so you'd need to offload the data.
Sandshark
Sep 15, 2020Sensei
Since you have access to the data, I think you are far better off doing a backup, factory default, and restore. I would not trust that you have taken care of every possible detail if you manually try to re-build the configuration files. And if you haven't, future expansion could be problematic.
FYI "data-0" is the name of the first MDADM RAID that makes up BTRFS volume "data". If you have two layers of RAID (from vertical expansion in the past), you may have "lost" the second one (data-1).
Retired_Member
Sep 16, 2020Sandshark Thank you for your reply. Your help is utterly invaluable! I'm not sure I understand. I've only really looked at the web admin suite showing the following: https://i.imgur.com/MNs02tZ.jpg
The four identical drives have been in from the start, RAID 5 and at this point I will have no interest in expanding the device in the future. This box was chosen to avoid this kind of time sink, if a drive failed, slap in a new one and forget was intended. :( As you can see above when it was working I only had 'data' volume as RAID 5 with the usage tallied.
When it comes to backing up and reseting as you mention, how do I have access to data? Is there a process/guide that you could recommend? (sorry I am having difficulty googling this issue!) I'm guessing that the backup will probably requires roughly 4TB, I'll need to have that space available elsewhere... Could be time to get a new nas and put this one on ebay?
I'd love to know why the software decided that any hard drives disconnected considering the device is locked in a ventilated cupboard and only I have the key. Hey ho. :/
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