Hello, friends!
I have some troubles with removable disk after powering off without unmounting.
'btrfsck' and 'btrfs-select-super' didn't help.
# uname -srvo
Linux 2.6.37-gentoo #2 SMP PREEMPT Tue Jan 11 20:58:56 VLAT 2011 GNU/Linux
Installed sys-fs/btrfs-progs-0.19-r2.
# btrfs fi show
failed to read /dev/sr0
Label: none uuid: acf790ef-13ba-4c08-b0d3-3ab9938b5b94
Total devices 1 FS bytes used 9.97GB
devid 1 size 14.65GB used 14.65GB path /dev/sda4
Label: none uuid: 53b9ab33-8049-46e0-a90f-b601446abc79
Total devices 1 FS bytes used 20.35GB
devid 1 size 150.00GB used 23.29GB path /dev/sdc2
# mount -t btrfs /dev/sdc2 /mnt/
mount: wrong fs type, bad option, bad superblock on /dev/sdc2,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg
device fsid e046498033abb953-79bc6a4401b60fa9 devid 1 transid 433 /dev/sdc2
btrfs: open_ctree failed
# btrfsck /dev/sdc2
found 21851738112 bytes used err is 0
total csum bytes: 21297140
total tree bytes: 43466752
total fs tree bytes: 17068032
btree space waste bytes: 7526756
file data blocks allocated: 21808271360
referenced 21808271360
Btrfs Btrfs v0.19
# btrfs-select-super -s 1 /dev/sdc2
using SB copy 1, bytenr 67108864
# btrfs-debug-tree /dev/sdc2
root tree
leaf 23651717120 items 12 free space 1987 generation 433 owner 1
fs uuid 53b9ab33-8049-46e0-a90f-b601446abc79
chunk uuid 461537d2-d586-4f0c-9469-09d8933bce0a
item 0 key (EXTENT_TREE ROOT_ITEM 0) itemoff 3756 itemsize 239
root data bytenr 23651721216 level 2 dirid 0 refs 1
.....................................
item 30 key (12298 EXTENT_DATA 0) itemoff 1548 itemsize 53
extent data disk byte 22261157888 nr 13418496
extent data offset 0 nr 13418496 ram 13418496
extent compression 0
data reloc tree key (DATA_RELOC_TREE ROOT_ITEM 0)
leaf 29380608 items 2 free space 3773 generation 5 owner 18446744073709551607
fs uuid 53b9ab33-8049-46e0-a90f-b601446abc79
chunk uuid 461537d2-d586-4f0c-9469-09d8933bce0a
item 0 key (FIRST_CHUNK_TREE INODE_ITEM 0) itemoff 3835 itemsize 160
inode generation 4 size 0 block group 0 mode 40555 links 1
item 1 key (FIRST_CHUNK_TREE INODE_REF 256) itemoff 3823 itemsize 12
inode ref index 0 namelen 2 name: ..
total bytes 161067429888
bytes used 21851738112
uuid 53b9ab33-8049-46e0-a90f-b601446abc79
Btrfs Btrfs v0.19
I've already found similar trouble http://www.spinics.net/lists/linux-
btrfs/msg07572.html . but that solution didn't help.
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
