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Cache: Unmountable: Unsupported or no file system (after update)

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Wife said plex wasn't working, noticed server had restarted unplanned and got this for my cache/docker drive.

image.png

I tried the "Stop array and unassign both pool devices

Start array (click checkbox "I want to do this")

Stop array

Reassign both pool devices

Start array"

trick, did not work, also tried updating to latest Unraid, here are the dignostics, anyhelp would appreciate it, happy wife, happy life.

tower-diagnostics-20250531-2118.zip

Solved by JorgeB

  • Community Expert
  • Solution

Type btrfs rescue zero-log /dev/nvme0n1p1 then restart the array and post new diags.

  • Author
7 hours ago, JorgeB said:

Type btrfs rescue zero-log /dev/nvme0n1p1 then restart the array and post new diags.

7 hours ago, JorgeB said:

Type btrfs rescue zero-log /dev/nvme0n1p1 then restart the array and post new diags.

seems to have done the job! (attached logs just in case)

tower-diagnostics-20250601-1043.zip

  • Author
8 hours ago, JorgeB said:

Type btrfs rescue zero-log /dev/nvme0n1p1 then restart the array and post new diags.

Unfortunately problem came right back after a restart :\

Reran that script, it came back up, but now im worried this will keep happening. I attatched log after running script again.

tower-diagnostics-20250601-1119.zip

Edited by theMillen

  • Community Expert

If the issue is recurring, I would recommend backing up and recreating the pool, but first run memtest, since btrfs is also detecting some data corruption.

  • Author
On 6/2/2025 at 2:51 AM, JorgeB said:

If the issue is recurring, I would recommend backing up and recreating the pool, but first run memtest, since btrfs is also detecting some data corruption.

so ran memtest was definitely RAM, sea of red errors.

replaced RAM, reran the btrfs rescue script and plex is giving me all kinds of errors. any guides on backing up and recreating the pool that explains like im five? (attatched logs again)

tower-diagnostics-20250603-1755.zip

Edited by theMillen

  • Community Expert

Basically just copy everything you can somewhere else, then reformat the pool and restore the data, of course, some of it can and will likely be corrupt.

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