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btrfs "Unmountable: wrong or no file system"

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Hey All!
I have an array of 3 ssd's as a cache because I was told that SSD's should be used as a cache instead of using a normal pool.

I updated my instance, and now it is giving me the error "Unmountable: wrong or no file system", and i cant figure out why!

Crucial data is backed up but it would be nice to have my array working again!

tower-diagnostics-20260702-1107.zip

  • Community Expert

Post the output from btrfs fi show

  • Author

root@Tower:~# btrfs fi show

warning, device 3 is missing

Label: none uuid: 5e6be76c-cb26-4771-a977-70d20cc14982

Total devices 3 FS bytes used 1.75TiB

devid 1 size 953.87GiB used 607.00GiB path /dev/nvme0n1p1

devid 2 size 1.86TiB used 610.01GiB path /dev/sdb1

*** Some devices missing

Label: none uuid: 598017b0-28dc-4ed1-96b1-7f8205c3c5f5

Total devices 1 FS bytes used 14.56GiB

devid 1 size 50.00GiB used 24.07GiB path /dev/sda1

root@Tower:~#

Here is what the dashboard look like

image.png

Edited by adastorm

  • Community Expert

Is the missing device expected? Post the output from

blkid /dev/sda

and

fdisk -l /dev/sda

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