I think I"m screwed. All my drives appear empty now. I'm guessing something was on the cache that helped with the file system and I'm not suire I can restore. I attached my diagnostics, but don't konw if that will help.

If anyone can help, or has any ideas I'd appreciate it. My folder structure is still there, but none of the files are, except for disk 3 for some reason. It seems to have all my mp3's still.

fatty-diagnostics-20260707-2210.zip

Edited 11 hours ago11 hr by x_Homer007_x

Please post more details of what was done, just changing a pool filesystem will not affect the array. Also, the diags don't show any pool reformat, and the pool is still btrfs.

Sorry, I posted in a panic pretty late.... I had the infinite wisdom to change my SATA SSD cache from btrfs to zfs. I stopped the array, clicked cache, changed the file system type to ZFS, clicked apply, then done. I did NOT bring the array back online and set it back to btrfs, apply -> done. Brought the array back online and am now seeing all drives in my array are using minimal data. Disk 3 still seems to have my Music folder in tact which I copied to a safe place for now. I stopped the array, posted my question above and went to sleep.

When I got up this morning I brought the array up in maintenance mode and ran a btrfs check status in the gui. It shows it found errors:

My non-cache drives are XFS and did not show any erros when running a status check.

Edited 2 hours ago2 hr by x_Homer007_x

If you just reformat the pool, that will have nothing to do with any array missing data. The diags show that most disks are actually empty; the two most common reasons for this to happen are:

• server is internet-facing; it was hacked, and the files were deleted.

• More commonly, a container, typically media-related, did some scheduled cleanup/maintenance and deleted some files.

That's what backups are for right :). The server has never been internet facing has been running stable since about 2020... I have no clue where my files went. The only docker container I'm using is Emby for watching movies. It's just bizarre that 14tb of movies and pictures are just gone.