It seem that another device doesn't detect as btrfs filesystem anymore.(I think because its header had been overwritten.) That device is not appear when I run "btrfs filesystem show". On Sun, Oct 17, 2010 at 11:04 PM, Goffredo Baroncelli <kreijack@xxxxxxxxx> wrote: > 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 Âable 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 Âuuid: 5673597c-ff57-4a42-8fe3-ff793f476809 >> >    ÂTotal devices 2 FS bytes used 706.75GB >> >    Âdevid  Â1 size 930.00GB used 717.26GB path /dev/sda1 >> >    Â*** 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 Âhttp://vger.kernel.org/majordomo-info.html >> > > > -- > gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <kreijack@xxxxxxxxx> > Key fingerprint = 4769 7E51 5293 D36C 814E ÂC054 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
