Hi
I have problem mounting my 3 disk raid1.
This happened after upgrading from Kubuntu 14.04 to 16.04.
The raid1 started as a 2 disk raid1 and was gowned to 3 disks raid1 a
while back. The physical disk has dm-crypt LUKS on top.
Does anyone have any advise?
Information about the system follow, if you need more information please
let me know.
$ sudo mount /mnt/nydata
------------------------
mount: wrong fs type, bad option, bad superblock on /dev/mapper/cdisk20,
missing codepage or helper program, or other error
The output in syslog after the failed mount:
/var/log/syslog
---------------
Nov 25 20:25:35 cb kernel: [13486.074249] BTRFS info (device dm-11):
enabling auto defrag
Nov 25 20:25:35 cb kernel: [13486.074257] BTRFS info (device dm-11):
disk space caching is enabled
Nov 25 20:25:35 cb kernel: [13486.139842] attempt to access beyond end
of device
Nov 25 20:25:35 cb kernel: [13486.139847] dm-10: rw=32, want=5263951296,
limit=4294963198
Nov 25 20:25:35 cb kernel: [13486.139868] attempt to access beyond end
of device
Nov 25 20:25:35 cb kernel: [13486.139870] dm-9: rw=32, want=5261815232,
limit=4294963198
Nov 25 20:25:35 cb kernel: [13486.139880] BTRFS: failed to read tree
root on dm-11
Nov 25 20:25:35 cb kernel: [13486.160009] BTRFS: open_ctree failed
$ sudo btrfs filesystem show
----------------------------
Label: none uuid: 6554e692-6c1c-4a69-8ff8-cb5615fb9200
Total devices 3 FS bytes used 6.38TiB
devid 1 size 5.46TiB used 4.38TiB path /dev/mapper/cdisk20
devid 2 size 5.46TiB used 4.38TiB path /dev/mapper/cdisk21
devid 3 size 5.46TiB used 4.38TiB path /dev/mapper/cdisk22
$ ls -l /dev/mapper/cdisk2[0-2]
-------------------------------
lrwxrwxrwx 1 root root 8 nov. 25 17:28 /dev/mapper/cdisk20 -> ../dm-10
lrwxrwxrwx 1 root root 7 nov. 25 17:28 /dev/mapper/cdisk21 -> ../dm-9
lrwxrwxrwx 1 root root 8 nov. 25 17:28 /dev/mapper/cdisk22 -> ../dm-11
$ sudo btrfs check /dev/mapper/cdisk20
--------------------------------------
bytenr mismatch, want=11817687138304, have=0
Couldn't read tree root
Couldn't open file system
$ sudo btrfs-find-root /dev/mapper/cdisk20 | head
-------------------------------------------------
Couldn't read tree root
Superblock thinks the generation is 743329
Superblock thinks the level is 1
Well block 11197008461824(gen: 743302 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196999434240(gen: 743301 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196990472192(gen: 743292 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196989538304(gen: 743291 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196988424192(gen: 743290 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196987424768(gen: 743289 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196986736640(gen: 743288 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
Well block 11196985982976(gen: 743287 level: 1) seems good, but
generation/level doesn't match, want gen: 743329 level: 1
/etc/fstab
----------
/dev/mapper/cdisk20 /mnt/nydata btrfs
defaults,autodefrag,space_cache 0 0
/dev/mapper/cdisk20 /data/film btrfs
defaults,autodefrag,space_cache,subvol=film 0 0
--
Kai Stian Olstad
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