Potentially lost appdata while changing to a new cache drive.

[Slicedbread]

I tried to change out my cache drive on my server and didn't realize my appdata only existed on the cache drive and was not backed up elsewhere. I tried remounting the old cache drive as the cache and it says it's unmountable. The drive is formatted in btrfs.

Can anyone advise me on how to recover my app data from my old cache drive?

Edited August 1, 2023 by Slicedbread

[Slicedbread]

I tried removing the new cache drive then remounting the old cache drive and I just see this? Is it possible I still have data on that drive or is it time to give up and rebuild? 

[Slicedbread]

I found this post 

 and 

btrfs restore -v /dev/sdX1 /mnt/disk2/restore

seems to be working for me. I plugged the drive into a pc running off an ubuntu live drive and it seems to be slowly copying my data now

Edited August 1, 2023 by Slicedbread

[JorgeB]

If btrfs restore doesn't recover everything you can post the diagnostics after a mount attempt.