I recently updated my machine from the 7.0 stable release to 7.0.1. Upon restarting, my cache drive (a single NVMe drive formatted with BTRFS) would no longer mount complaining of "Wrong or no file system". I attempted rebooting the machine, no luck. I then started the array in maintenance mode and ran a file system check from the WebUI. The reported errors were significant in number and various (checksums not matching, ref check failures, unresolved ref dir). The official documentation is a bit light on next steps as the recommended usage of the scrub command isn't possible without a mounted file system. Happy to provide more details if required but unsure of what the next steps should be to try and recover the drive  

unraid-diagnostics-20250305-2250.zip

17 minutes ago, charlie15 said:

checksums not matching

Have you done memtest recently?

 

Memtest is on the boot menu.

Type 

btrfs rescue zero-log /dev/nvme0n1p1

 

Then restart the array and post new diags.

Ran Memtest and passed. Then ran the btrfs rescue command and restarted and that seems to have fixed the issue as the disk has mounted itself again. Updated diagnostics attached just in case there are other issues lurking in the background I should be aware of.

unraid-diagnostics-20250306-2219.zip

Run a scrub on the pool and post the results, also take the opportunity to make sure backups are up to date.

I've attempted to run the scrub command, however it seems to be aborting and not completing it's run. 

If the scrub is aborting there are other issues, I would recommend backing up what you can from the pool and then reformat

Took me some time to get back around to this, and I definitely found a couple of corrupted files while attempting to backup the drive, but the reformat cleared the scrub errors. Thanks for the help!