I realized today that my docker service was not running, after checking the logers I saw a lot of errors:

Jul  5 16:29:53 raikou kernel: I/O error, dev loop2, sector 20313792 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device loop2 state EA): bdev /dev/loop2 errs: wr 1, rd 68565, flush 1, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device nvme0n1p1 state EA): bdev /dev/nvme0n1p1 errs: wr 129, rd 69008, flush 0, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: I/O error, dev loop2, sector 20838080 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device loop2 state EA): bdev /dev/loop2 errs: wr 1, rd 68566, flush 1, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device nvme0n1p1 state EA): bdev /dev/nvme0n1p1 errs: wr 129, rd 69009, flush 0, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: I/O error, dev loop2, sector 20313792 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device loop2 state EA): bdev /dev/loop2 errs: wr 1, rd 68567, flush 1, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device nvme0n1p1 state EA): bdev /dev/nvme0n1p1 errs: wr 129, rd 69010, flush 0, corrupt 0, gen 0
Jul  5 16:29:53 raikou kernel: I/O error, dev loop2, sector 20838080 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:53 raikou kernel: BTRFS error (device loop2 state EA): bdev /dev/loop2 errs: wr 1, rd 68568, flush 1, corrupt 0, gen 0
Jul  5 16:29:54 raikou kernel: BTRFS error (device nvme0n1p1 state EA): bdev /dev/nvme0n1p1 errs: wr 129, rd 69011, flush 0, corrupt 0, gen 0
Jul  5 16:29:54 raikou kernel: I/O error, dev loop2, sector 20313792 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:54 raikou kernel: BTRFS error (device loop2 state EA): bdev /dev/loop2 errs: wr 1, rd 68569, flush 1, corrupt 0, gen 0
Jul  5 16:29:54 raikou kernel: I/O error, dev loop2, sector 20838080 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:54 raikou kernel: I/O error, dev loop2, sector 20313792 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:54 raikou kernel: I/O error, dev loop2, sector 20838080 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:55 raikou kernel: I/O error, dev loop2, sector 20313792 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0
Jul  5 16:29:55 raikou kernel: I/O error, dev loop2, sector 20838080 op 0x0:(READ) flags 0x1000 phys_seg 4 prio class 0

I tried to re-create my docker image no success. Then tried to stop the array to repair the cache drive, and array wont stop. Getting those errors:

Jul  5 16:43:11 raikou emhttpd: Unmounting disks...
Jul  5 16:43:11 raikou emhttpd: shcmd (968474): umount /mnt/cache
Jul  5 16:43:11 raikou root: umount: /mnt/cache: target is busy.
Jul  5 16:43:11 raikou emhttpd: shcmd (968474): exit status: 32
Jul  5 16:43:11 raikou emhttpd: Retry unmounting disk share(s)...
Jul  5 16:43:13 raikou kernel: btrfs_dev_stat_inc_and_print: 30 callbacks suppressed

losetup gives me:

NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE DIO LOG-SEC

/dev/loop1 0 0 1 1 /boot/bzmodules 0 512

/dev/loop2 0 0 1 0 /mnt/cache/system/docker/docker.img 0 512

/dev/loop0 0 0 1 1 /boot/bzfirmware 0 512

/dev/loop3 0 0 1 0 /mnt/cache/system/libvirt/libvirt.img 0 512

'/etc/rc.d/rc.docker status' gives me:

Docker daemon is not running.

root@raikou:/# umount /dev/loop2

umount: /dev/loop2: not mounted.

Any suggestions ?

Edited July 5, 2025Jul 5 by mdastous

Please post the diagnostics

Managed to shutdown cleanly, cleared / formatted cache drive and restored backup... Ran memtest, no issues found.

Lets see if it remains stable...