I screwed up majorly. ironically while setting up CommunityBacupData; previous appdata backup is sadly years old.

in /mnt/user/CommunityApplicationsAppdataBackup i created another appdata dir to move contents of CommunityApplicationsAppdataBackup/ to.

But the move operation rewrote the appdata:

mv appdata/ ..

So empty directory /mnt/user/CommunityApplicationsAppdataBackup was moved to /mnt/user/

After this (note realizing what I had done) I moved the contents of appdataBackup previous backups into the new directory:

┌─[Tower]─[/mnt/user/CommunityApplicationsAppdataBackup]
└──╼ mv * ../appdata
mv: failed to access '../appdata': Transport endpoint is not connected

Unsure if this process completed or not. What i do know is listing the contents of CommunityApplicationsAppdataBackup/ definitely still worked prior this last move.

Array was stopped afterwards. Any chance of saving anything from the drive from this state? appdata was set to cache Only (or maybe Prefer) sadly.

 

Also listing all shared fails:

ls -lt /mnt/user
ls: cannot access '/mnt/user': Transport endpoint is not connected

Filesystem on cache drive is xfs.

Edit: full recap of the commands performed:
 

┌─[Tower]─[~]
└──╼  cd /mnt/user/CommunityApplicationsAppdataBackup


┌─[Tower]─[/mnt/user/CommunityApplicationsAppdataBackup]
└──╼  mkdir appdata


┌─[Tower]─[/mnt/user/CommunityApplicationsAppdataBackup]
└──╼  ls
[email protected]  [email protected]  [email protected]  [email protected]  [email protected]  [email protected]  [email protected]  [email protected]  appdata


┌─[Tower]─[/mnt/user/CommunityApplicationsAppdataBackup]
└──╼  mv appdata/ ..


┌─[Tower]─[/mnt/user/CommunityApplicationsAppdataBackup]
└──╼  mv * ../appdata
mv: failed to access '../appdata': Transport endpoint is not connected

^ exit code of this was non-zero

 

Edited September 14, 20205 yr by tuxbass

Given appdata is gone, what would be the process to get unraid operational again?

I assume unraid is working?  Dockers can be reinstalled using previous apps in the app store.  This should set them up how they were before.  However stuff like your plex database would have to be remade unless you have a backup.

Unraid is working. But even /mnt/user/ is inaccessible:

┌─[Tower]─[/mnt]
└──╼ ls /mnt/user
ls: cannot access '/mnt/user': Transport endpoint is not connected

 

28 minutes ago, tuxbass said:

Unraid is working. But even /mnt/user/ is inaccessible:

Download the diagnostics zip file. Stop array and then reboot Unraid. Start array, download the diagnostics again. Attach both diagnostics files to your next post in this thread.

Cool, will do that. I'll see what if any i manage to recover before rebooting; still working on that.

Edited August 31, 20205 yr by tuxbass

Finally mounted the cache partition after long recovery process, and... appdata contents are all there!
How on earth is that possible? Looking back at the entered commands above I can't see how it wasn't overwritten.

Don't get me wrong, I'm over the moon about it, but can't make any sense about what actually happened.

 

Is it because the mv operation targeted /mnt/user, not /mnt/cache?

Edited September 14, 20205 yr by tuxbass

Did you ever reboot? Are user shares accessible now?

 

I'm not sure writing files to /mnt/user will actually do anything that will survive reboot. Writing a folder to /mnt/user will result in creating a user share named for the folder and any contents would probably wind up on disk1 or whichever disk was in line for highwater.

 

Not sure what would happen if you deleted a folder from /mnt/user or overwrote /mnt/user with nothing. Maybe it would just break user shares rather than going through all the disks and deleting everything. Not going to try it😉

>Did you ever reboot?
Yes, before reboot absolutely no shares (not only appdata) were accessible.
Delayed rebooting to make sure all the data-recovery is done prior, this was to ensure no writes to cache drive were performed beforehand.

 

Can't believe how lucky I am unraid saved me from myself. At least gained some experience recovering data from xfs 🤷‍♂️

Edited September 14, 20205 yr by tuxbass