On Mon, Aug 22, 2022 at 9:57 AM George R Goffe via users <users@lists.fedoraproject.org> wrote:
Hi,

I started getting i/o error messages accessing this filesystem so I rebooted the system. This might have been the wrong thing to do. This subsequent boot went to maintenance mode due the filesystem's path being in /etc/fstab.

I need some help with this please. Here is what mount says:

mount /dev/sda6 /opt.

kernel: BTRFS info (device sda6): flagging fs with big metadata feature
kernel: BTRFS info (device sda6): disk space caching is enabled
kernel: BTRFS info (device sda6): has skinny extents
kernel: BTRFS error (device sda6): parent transid verify failed on 148312850432 wanted 73476 found 73484

See: kernel: https://wiki.tnonline.net/w/Btrfs/Parent_Transid_Verify_Failed for explanation

TLDNR: bad news, but btrfs experts may be able to help with recovery.  The article does
describe some information you should collect before asking for help.  I would add that
you should check the hardware: cables, drive S.M.A.R.T status. dodgy power supply on
external drives, etc.
 
kernel: BTRFS error (device sda6): failed to read block groups: -5
kernel: BTRFS error (device sda6): open_ctree failed

--
George N. White III