Hello all,
I give up for this problem at restore my data
# uname -a
Linux jarvis.home 4.5.0-1.el7.elrepo.x86_64
# btrfs --version
btrfs-progs v3.19.1
# btrfs fi show
warning, device 4 is missing
bytenr mismatch, want=21020672, have=21217280
Couldn't read chunk root
Label: none uuid: 27ef2638-b50a-4243-80ed-40c3733ec11d
Total devices 4 FS bytes used 2.50TiB
devid 1 size 931.51GiB used 899.71GiB path /dev/sdd
devid 2 size 931.51GiB used 899.69GiB path /dev/sdb
devid 3 size 931.51GiB used 899.69GiB path /dev/sdc
*** Some devices missing
# mount -o recovery /dev/sda /srv/
mount: wrong fs type, bad option, bad superblock on /dev/sda,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
dmesg after :
[ 4886.521315] BTRFS info (device sdc): enabling auto recovery
[ 4886.521320] BTRFS info (device sdc): disk space caching is enabled
[ 4886.522853] BTRFS: failed to read chunk tree on sdc
[ 4886.528789] BTRFS: open_ctree failed
#btrfs check --repair /dev/sda
enabling repair mode
warning, device 4 is missing
bytenr mismatch, want=21020672, have=21217280
Couldn't read chunk root
Couldn't open file system
# btrfs rescue chunk-recover -v /dev/sda
All Devices:
Device: id = 3, name = /dev/sdc
Device: id = 2, name = /dev/sdb
Device: id = 1, name = /dev/sda
[ 5164.468272] btrfs[3653]: segfault at 7f454014172e ip 0000000000423479
sp 00007f4482cec880 error 4 in btrfs[400000+83000]
[ 5168.928317] btrfs[3657]: segfault at 7fd18c14172e ip 0000000000423479
sp 00007fd0d5858880 error 4 in btrfs[400000+83000]
[ 5173.812457] btrfs[3662]: segfault at 7fd76c14172e ip 0000000000423479
sp 00007fd6b0e59880 error 4 in btrfs[400000+83000]
# btrfs rescue super-recover -v /dev/sda
All Devices:
Device: id = 3, name = /dev/sdc
Device: id = 2, name = /dev/sdb
Device: id = 1, name = /dev/sda
Before Recovering:
[All good supers]:
device name = /dev/sdc
superblock bytenr = 65536
device name = /dev/sdc
superblock bytenr = 67108864
device name = /dev/sdc
superblock bytenr = 274877906944
device name = /dev/sdb
superblock bytenr = 65536
device name = /dev/sdb
superblock bytenr = 67108864
device name = /dev/sdb
superblock bytenr = 274877906944
device name = /dev/sda
superblock bytenr = 65536
device name = /dev/sda
superblock bytenr = 67108864
device name = /dev/sda
superblock bytenr = 274877906944
[All bad supers]:
All supers are valid, no need to recover
# btrfs-show-super /dev/sda
superblock: bytenr=65536, device=/dev/sda
---------------------------------------------------------
csum 0x61b509bb [match]
bytenr 65536
flags 0x1
magic _BHRfS_M [match]
fsid 27ef2638-b50a-4243-80ed-40c3733ec11d
label
generation 69462
root 1648640000
sys_array_size 290
chunk_root_generation 48545
root_level 1
chunk_root 21020672
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 4000819544064
bytes_used 2743528714240
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 4
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0xe1
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
RAID56 )
csum_type 0
csum_size 4
cache_generation 69462
uuid_tree_generation 69462
dev_item.uuid 70f4650c-e01d-4613-bd7a-a6834c1c44bb
dev_item.fsid 27ef2638-b50a-4243-80ed-40c3733ec11d [match]
dev_item.type 0
dev_item.total_bytes 1000204886016
dev_item.bytes_used 966057263104
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
thx for helps
--
[ 88.423604] BTRFS warning (device sdc): devid 4 uuid c24f39f8-c73c-4a17-bbef-cb8988adcbf7 is missing
[ 88.455607] BTRFS info (device sdc): bdev (null) errs: wr 921, rd 164889, flush 0, corrupt 0, gen 0
[ 88.800609] BTRFS error (device sdc): bad tree block start 0 1619525632
[ 88.800648] BTRFS: Failed to read block groups: -5
[ 88.809756] BTRFS: open_ctree failed
[ 143.792547] BTRFS info (device sdc): allowing degraded mounts
[ 143.792552] BTRFS info (device sdc): disk space caching is enabled
[ 143.802719] BTRFS info (device sdc): bdev (null) errs: wr 921, rd 164889, flush 0, corrupt 0, gen 0
[ 143.874370] BTRFS error (device sdc): bad tree block start 0 1619525632
[ 143.874410] BTRFS: Failed to read block groups: -5
[ 143.883571] BTRFS: open_ctree failed
[ 402.564374] BTRFS info (device sdc): enabling auto recovery
[ 402.564379] BTRFS info (device sdc): disk space caching is enabled
[ 402.565551] BTRFS: failed to read chunk tree on sdc
[ 402.570197] BTRFS: open_ctree failed
[ 604.273452] btrfs[2536]: segfault at 7f7fe014172e ip 0000000000423479 sp 00007f7f21358880 error 4 in btrfs[400000+83000]
[ 1101.315762] BTRFS info (device sdc): enabling auto recovery
[ 1101.315766] BTRFS info (device sdc): disk space caching is enabled
[ 1101.316980] BTRFS: failed to read chunk tree on sdc
[ 1101.323006] BTRFS: open_ctree failed
[ 1124.008691] BTRFS info (device sdc): enabling auto recovery
[ 1124.008695] BTRFS info (device sdc): disk space caching is enabled
[ 1124.009859] BTRFS: failed to read chunk tree on sdc
[ 1124.013344] BTRFS: open_ctree failed
[ 1151.424614] btrfs[2666]: segfault at 7f8ff414172e ip 0000000000423479 sp 00007f8f3bcf3880 error 4 in btrfs[400000+83000]
[ 1191.661205] btrfs[2677]: segfault at 7f060014172e ip 0000000000423479 sp 00007f0545789880 error 4 in btrfs[400000+83000]
[ 2368.120700] BTRFS info (device sdc): enabling auto recovery
[ 2368.120704] BTRFS info (device sdc): disk space caching is enabled
[ 2368.121924] BTRFS: failed to read chunk tree on sdc
[ 2368.126591] BTRFS: open_ctree failed
[ 2370.738712] BTRFS info (device sdc): enabling auto recovery
[ 2370.738717] BTRFS info (device sdc): disk space caching is enabled
[ 2370.740003] BTRFS: failed to read chunk tree on sdc
[ 2370.744624] BTRFS: open_ctree failed
[ 2373.002807] BTRFS info (device sdc): enabling auto recovery
[ 2373.002811] BTRFS info (device sdc): disk space caching is enabled
[ 2373.004001] BTRFS: failed to read chunk tree on sdc
[ 2373.007651] BTRFS: open_ctree failed
[ 2513.800271] BTRFS info (device sdc): enabling auto recovery
[ 2513.800276] BTRFS info (device sdc): disk space caching is enabled
[ 2513.802181] BTRFS: failed to read chunk tree on sdc
[ 2513.808614] BTRFS: open_ctree failed
[ 2972.448037] btrfs[3152]: segfault at 7f454c14172e ip 0000000000423479 sp 00007f4494305880 error 4 in btrfs[400000+83000]
[ 3123.647370] BTRFS info (device sdb): enabling auto recovery
[ 3123.647375] BTRFS info (device sdb): disk space caching is enabled
[ 3123.648233] BTRFS: failed to read chunk root on sdb
[ 3123.655235] BTRFS: open_ctree failed
[ 3131.574580] BTRFS info (device sdb): enabling auto recovery
[ 3131.574585] BTRFS info (device sdb): disk space caching is enabled
[ 3131.575360] BTRFS: failed to read chunk root on sdb
[ 3131.582234] BTRFS: open_ctree failed
