2011/1/12 Tsutomu Itoh <t-i...@jp.fujitsu.com>: > (2011/01/12 9:25), Leonidas Spyropoulos wrote: >> 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 > > Please see Problem_FAQ in btrfs wiki. > (https://btrfs.wiki.kernel.org/index.php/Problem_FAQ) > > Thanks, > Itoh > >> >> 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 >> > >
Hey cwillu and Itoh, Thanks both for the answers, so as I can see I have 2 options: Either find the startup scripts of Arch Linux and run the scan command before parsing fstab (this should be in /etc/rc.conf ?) OR edit fstab with parameters the correct devices like: /dev/disk/by-uuid/1882b025-58e4-4287-98a3-9b772af0ad76 /media/data btrfs device=/dev/sde2,device=/dev/sdd2,rw,user 0 0 I think though that the devices names are randomly chosen in startup from udev, right? (this is the reason I use uuids) so effectivly i have just an option. Thanks, Leonidas -- Caution: breathing may be hazardous to your health. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
