After a reboot you need to do # btrfs device scan in order to search all devices which may be involved in a multi devices setup (like RAID). G.Baroncelli On Sunday, 17 October, 2010, Chalet16 wrote: > UPDATE: I'm currently able to see and read/write some file in degraded mode > but there're many file i can't read with input/output error too. > > > On Sun, Oct 17, 2010 at 9:57 PM, Chalet16 <chalet16@xxxxxxxxx> wrote: > > I had set up btrfs with 2 devices by using command this command sequence. > > "mkfs.btrfs -m raid1 /dev/sda1 > > mount /dev/sda1 /mnt/data > > btrfs-vol -a /dev/sdb1 /mnt/data > > btrfs-vol -b /mnt/data" > > > > (I was think that it will do raid1 for both data and metadata but I currently > > realised that it will do raid1 for metadata but raid0 for data.) > > > > But I forgot that I have mount /dev/sdb1 with TrueCrypt. After I restarted my > > PC and try to mount both devices array again there was a message in dmesg said > > "chalet16@server:~$ sudo mount /dev/sda1 /mnt/data > > [ 2828.921406] device label btr2902 devid 1 transid 8829 /dev/mapper/truecrypt1 > > [ 2828.931780] btrfs: failed to read the system array on dm-1 > > [ 2828.961330] btrfs: open_ctree failed" > > > > And when I ran btrfs-show it show that > > "chalet16@server:~$ sudo btrfs-show > > failed to read /dev/sr0 > > Label: btr2902 uuid: 5673597c-ff57-4a42-8fe3-ff793f476809 > > Total devices 2 FS bytes used 706.75GB > > devid 1 size 930.00GB used 717.26GB path /dev/sda1 > > *** Some devices missing > > Btrfs Btrfs v0.19" > > And when I run btrfsck on missing device > > "chalet16@server:~$ sudo btrfsck /dev/sde1 > > No valid Btrfs found on /dev/sde1" > > > > So I would like to ask for help to recover data from this btrfs raid array. In > > my opinion I think that TrueCrypt only overwrite a little location in device > > because I haven't done anything with TrueCrypt device after that. > > > > Thanks > > Chalet16 > > > > > > PS. I have recently known that TrueCrypt is in "Forbidden items" list in Fedora > > wiki, but this is not really related to TrueCrypt so please don't ban me because > > I had used TrueCrypt. > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <kreijack@xxxxxxxxx> Key fingerprint = 4769 7E51 5293 D36C 814E C054 BF04 F161 3DC5 0512 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
