Hey all,
I have a weird error with my RAID 0 btrfs partition.
Information for the partitions follow:
# btrfs filesystem show
failed to read /dev/sr0
Label: none uuid: 1882b025-58e4-4287-98a3-9b772af0ad76
Total devices 2 FS bytes used 108.16GB
devid 2 size 74.53GB used 55.26GB path /dev/sdd2
devid 3 size 74.53GB used 55.26GB path /dev/sde2
Btrfs v0.19-35-g1b444cd
# btrfs device scan
Scanning for Btrfs filesystems
failed to read /dev/sr0
# cat /etc/fstab | grep btrfs
/dev/disk/by-uuid/1882b025-58e4-4287-98a3-9b772af0ad76 /media/data
btrfs rw,user 0 0
# blkid
/dev/sdd2: UUID="1882b025-58e4-4287-98a3-9b772af0ad76"
UUID_SUB="468b49fa-a0b6-4e11-a312-ef0cafd2890a" TYPE="btrfs"
/dev/sde2: UUID="1882b025-58e4-4287-98a3-9b772af0ad76"
UUID_SUB="cf534558-a317-4259-808b-d950a155fb5d" TYPE="btrfs"
Although I have the config within fstab it doesn't mount on bootup with error:
mount: wrong fs type, bad option, bad superblock on /dev/sde2,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
Kernel messages:
device fsid 8742e45825b08218-76adf02a779ba398 devid 3 transid 4778 /dev/sde2
btrfs: failed to read the system array on sde2
No matter how many times I try with sudo mount -a or sudo mount
/media/data I got the same error.
Now the weird stuff:
If I do a blkid and fdisk -l I can then mount normally the partition.
Any ideas?
Kernel info: Linux woofy 2.6.36-ARCH #1 SMP PREEMPT Sat Jan 8 14:15:27
CET 2011 x86_64 Dual Core AMD Opteron(tm) Processor 165 AuthenticAMD
GNU/Linux
btrfs-progs: Latest from git
I don't know which revision/patch Arch stock kernel has of btrfs.
Thanks,
Leonidas
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