Created
December 6, 2019 18:12
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Synology BTRFS repair
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| btrfs fi show -d | |
| (/dev/mapper/vg1000-lv) | |
| syno_poweroff_task -d | |
| (or: umount /volume1) | |
| (or2: umount /volume1 -f -k) | |
| Check to see if all us unmounted: | |
| df -h | |
| mdadm --stop /dev/vg1000/lv | |
| btrfsck /dev/vg1000/lv | |
| btrfs check --repair /dev/vg1000/lv | |
| btrfs rescue super-recover -v /dev/vg1000/lv | |
| vgchange -ay | |
| e2fsck -nvf -C 0 /dev/vg1000/lv | |
| fsck.ext4 -pvf -C 0 /dev/vg1000/lv | |
| (or: e2fsck -pvf -C 0 /dev/vg1000/lv -C O) | |
| (do not do this: -C fd) |
With DSM 7.2.2-72806 Update 3:
# to unmount
synostgvolume --unmount -p /volume1
# to mount the logic volume (I read it somewhere...)
vgchange -ay
# to just check
btrfs check /dev/mapper/cachedev_0
# to enable repair
btrfs check --clear-space-cache v2 /dev/mapper/cachedev_0
# to repair and pray
btrfs check --repair /dev/mapper/cachedev_0
P.S.: there are problems that can't be repaired. Then you should backup (before trying to repair), remove the volume and start again.
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I don’t have any snapshot. I am not using snapshots