I ran into an issue where my cache pool is now showing as read-only. The drive is formatted as BTRFS so I thought I'd just move everything to the array and take the opportunity to format as ZFS. After configuring all my shares with Array as the secondary storage and setting cache -> array nothing is transferred when using the Mover tool.

Any thoughts on next steps? I was considering moving the files manually to the array and reformatting but thought I'd get some guidance first.

Thank you!

unraid.server-diagnostics-20250723-1957.zip

Jul 23 19:41:01 unraid kernel: BTRFS warning (device sdb1: state EA): checksum verify failed on logical 67272704 mirror 1 wanted 0x79150f10 found 0x485f4505 level 0

Jul 23 19:41:01 unraid shfs: copy_file: /mnt/cache/data/media/movies/F1 (2025)/F1 (2025) - [WEBDL-1080p][EAC3 2.0].mkv /mnt/disk3/data/media/movies/F1 (2025)/F1 (2025) - [WEBDL-1080p][EAC3 2.0].mkv.partial (5) Input/output error

Btrfs is detecting data corruption, when that happens it will give an i/o error, to not silently copy corrupt files. Recommend running memtest first

Thank you for the help - Running MemTest now. I'll update with results.

MemTest has ran for 4 hours with no errors. I'll continue running the test and update if anything changes. It looks like the memory is not the issue.

Note that memtest is only definitive if it finds errors, but if nothing is found for now, you can copy the good files. There are also ways to copy the corrupt ones if you like, then recreate the pool and keep monitoring. If more corruptions are found soon, there's likely an underlying hardware issue.

Thank you. I'm a novice in this regard. If I copy the files and reformat the pool and move the files back will that impact any of my Docker containers?

5 hours ago, brettcb said:

will that impact any of my Docker containers?

Not as long as those files are not corrupt.