Unable to mount degraded RAID5

["Tomáš Hrdina" <thomas.rkh@gmail.com>]

Hello,
one of my 3 disks failed in RAID5. After that, fs is unable to mount.
Any help on what to try next would be appreciated.


sudo btrfs version
btrfs-progs v4.6.1
-- I installed 4.6.1 just now. I ran rescue on 4.4

uname -a
Linux uncik-srv 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:27:37 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux



sudo mount -t btrfs -o ro,recovery /dev/sdc /shares
mount: wrong fs type, bad option, bad superblock on /dev/sdc,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

sudo btrfs rescue chunk-recover /dev/sdc
Scanning: 2517981163520 in dev0, 3166618750976 in dev1Segmentation fault
(core dumped)

sudo btrfs filesystem show /dev/sda
warning, device 3 is missing
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
bytenr mismatch, want=12678831570944, have=10160133442474442752
Couldn't read chunk tree
Label: none  uuid: 2dab74bb-fc73-4c47-a413-a55840f6f71e
        Total devices 3 FS bytes used 3.80TiB
        devid    1 size 3.64TiB used 1.92TiB path /dev/sdb
        devid    2 size 3.64TiB used 1.92TiB path /dev/sda
        *** Some devices missing

sudo btrfs restore /dev/sda /mnt
warning, device 3 is missing
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
bytenr mismatch, want=12678831570944, have=10160133442474442752
Couldn't read chunk tree
Could not open root, trying backup super
warning, device 3 is missing
warning, device 1 is missing
bytenr mismatch, want=12678831570944, have=0
Couldn't read chunk tree
Could not open root, trying backup super
warning, device 3 is missing
warning, device 1 is missing
bytenr mismatch, want=12678831570944, have=0
Couldn't read chunk tree
Could not open root, trying backup super

sudo btrfs check /dev/sda
warning, device 3 is missing
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
checksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379
bytenr mismatch, want=12678831570944, have=10160133442474442752
Couldn't read chunk tree
Couldn't open file system


Log
http://sebsauvage.net/paste/?236c3f6f238dbf26#4kM3tx+CjlA8ke9yMH+gD/QDsnjNnBK2i5Do4CXwD04=

Thank you
Tomas

---
Tato zpráva byla zkontrolována na viry programem Avast Antivirus.
https://www.avast.com/antivirus