Hi Qu,
unfortunately nothing under dmesg.
~# btrfs ins dump-super -fFa /dev/md/1
superblock: bytenr=65536, device=/dev/md/1
---------------------------------------------------------
csum_type 48250 (INVALID)
csum_size 32
csum
0x8e5542eb70bced2a96808253fcb7a73c6085b6e754cbc8e2fb89674e9f738238 [UNKNOWN
CSUM TYPE OR SIZE]
bytenr 12181234483651309775
flags 0xd962ba5e4ef1695a
( RELOC |
CHANGING_FSID |
METADUMP |
METADUMP_V2 |
unknown flag: 0xd962ba504ef16958 )
magic .#7"f..0 [DON'T MATCH]
fsid a8da0ac7-579b-6d81-88cd-c933b794c785
metadata_uuid 156aee46-b94c-b9ba-962c-b332ab4667cc
label
0...=.a..Z.Y.`..T.l.H.f?....AAkv9.........ZB.M...........2..;!8.g...i..t..l.*.x!....].=......b.Q^D..
generation 12986127113123940026
root 13851558508265222271
sys_array_size 1161401401
chunk_root_generation 12667455870201283783
root_level 5
chunk_root 11926903618860088829
chunk_root_level 64
log_root 1841135978666913598
log_root_transid 11002435440050228634
log_root_level 248
total_bytes 8158923876795838803
bytes_used 17787222351354347041
sectorsize 2669808347
nodesize 4288500188
leafsize (deprecated) 1806564735
stripesize 4196907700
root_dir 16118946364209963189
num_devices 12936053495324799957
compat_flags 0x426746ddc014497a
compat_ro_flags 0x1a387ee25cbe0480
( unknown flag: 0x1a387ee25cbe0480 )
incompat_flags 0x6e87d5eadcdc0552
( DEFAULT_SUBVOL |
COMPRESS_ZSTD |
EXTENDED_IREF |
SKINNY_METADATA |
METADATA_UUID |
unknown flag: 0x6e87d5eadcdc0000 )
cache_generation 10057603985414728634
uuid_tree_generation 4068845440595781678
dev_item.uuid 7b2ddb16-78c6-091d-d77f-37032bb24e6f
dev_item.fsid 9c1be2b7-3fe4-29db-b0a7-b18caf3d3f5a [DON'T MATCH]
dev_item.type 6604466414397713944
dev_item.total_bytes 4621717855420266801
dev_item.bytes_used 8342047778331657076
dev_item.io_align 4279037902
dev_item.io_width 1775887180
dev_item.sector_size 2259074908
dev_item.devid 18157633788844884947
dev_item.dev_group 1667847581
dev_item.seek_speed 63
dev_item.bandwidth 207
dev_item.generation 3594285136264646998
sys_chunk_array[2048]:
ERROR: sys_array_size 1161401401 shouldn't exceed 2048 bytes
backup_roots[4]:
backup 0:
backup_tree_root: 6970368790324777925 gen:
12598614702518465874 level: 78
backup_chunk_root: 12185247256182217146 gen:
8294830950963298816 level: 207
backup_extent_root: 1288338481765642561 gen:
9286345172685317925 level: 66
backup_fs_root: 1024698212512227239 gen:
7381800784347480503 level: 173
backup_dev_root: 7291763814382499783 gen:
16237858643413215931 level: 245
backup_csum_root: 6458388087989564616 gen:
8793163284351336981 level: 197
backup_total_bytes: 9073274160022698418
backup_bytes_used: 18251414241723294857
backup_num_devices: 4518080734946755492
backup 1:
backup_tree_root: 8259739005406706376 gen:
11190415651942675634 level: 248
backup_chunk_root: 18248383521275344277 gen:
8975374588041967785 level: 77
backup_extent_root: 8904246775283008170 gen:
10396757054042900315 level: 167
backup_fs_root: 5396296792390782509 gen:
4442630659605843819 level: 199
backup_dev_root: 16699734435861110318 gen:
15048997227385557306 level: 150
backup_csum_root: 11341563417203940976 gen:
10565796296655441867 level: 147
backup_total_bytes: 14154396027034184437
backup_bytes_used: 4527608919712333479
backup_num_devices: 16180777334101189082
backup 2:
backup_tree_root: 7234681543498250474 gen:
1426436775921748192 level: 22
backup_chunk_root: 18299546316577055742 gen:
8457029571622666206 level: 190
backup_extent_root: 938095847490098596 gen:
3561749671145080517 level: 110
backup_fs_root: 16620609691604273391 gen:
13316231509064955595 level: 116
backup_dev_root: 6546605238984936919 gen:
8637539137105119188 level: 30
backup_csum_root: 4673665454181379707 gen:
2591971300734134658 level: 114
backup_total_bytes: 7209206266924999293
backup_bytes_used: 16310899366805622086
backup_num_devices: 14495759847441176014
backup 3:
backup_tree_root: 16070221463289531118 gen:
12053826310892106180 level: 98
backup_chunk_root: 4064898164871351729 gen:
15139400542209185938 level: 79
backup_extent_root: 12602461080827122942 gen:
882859735452525139 level: 187
backup_fs_root: 6147598603993586532 gen:
17537062445806784871 level: 17
backup_dev_root: 17321276347622146300 gen:
3635482114765943339 level: 73
backup_csum_root: 4762360560673113434 gen:
10797920740240765554 level: 167
backup_total_bytes: 14240312077713093305
backup_bytes_used: 10068420544575204023
backup_num_devices: 11928987221309933272
superblock: bytenr=67108864, device=/dev/md/1
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x636f9da3 [match]
bytenr 67108864
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 6bd5c974-2565-4736-815d-fe071f560e68
metadata_uuid 6bd5c974-2565-4736-815d-fe071f560e68
label
generation 168
root 340721664
sys_array_size 129
chunk_root_generation 156
root_level 1
chunk_root 22020096
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 375567417344
bytes_used 243939692544
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x161
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 168
uuid_tree_generation 168
dev_item.uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
dev_item.fsid 6bd5c974-2565-4736-815d-fe071f560e68 [match]
dev_item.type 0
dev_item.total_bytes 375567417344
dev_item.bytes_used 248059527168
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
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096)
length 8388608 owner 2 stripe_len 65536 type SYSTEM|DUP
io_align 65536 io_width 65536 sector_size 4096
num_stripes 2 sub_stripes 0
stripe 0 devid 1 offset 22020096
dev_uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
stripe 1 devid 1 offset 30408704
dev_uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
backup_roots[4]:
backup 0:
backup_tree_root: 350814208 gen: 166 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 340721664 gen: 166 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 354140160 gen: 166 level: 1
backup_csum_root: 353402880 gen: 166 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 1:
backup_tree_root: 57311232 gen: 167 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 69419008 gen: 167 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 317472768 gen: 167 level: 1
backup_csum_root: 345784320 gen: 167 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 2:
backup_tree_root: 340721664 gen: 168 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 340738048 gen: 168 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 345358336 gen: 168 level: 1
backup_csum_root: 353320960 gen: 168 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 3:
backup_tree_root: 57311232 gen: 165 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 69419008 gen: 165 level: 2
backup_fs_root: 352387072 gen: 157 level: 2
backup_dev_root: 317325312 gen: 165 level: 1
backup_csum_root: 343932928 gen: 165 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
superblock: bytenr=274877906944, device=/dev/md/1
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x9ee8cb92 [match]
bytenr 274877906944
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 6bd5c974-2565-4736-815d-fe071f560e68
metadata_uuid 6bd5c974-2565-4736-815d-fe071f560e68
label
generation 168
root 340721664
sys_array_size 129
chunk_root_generation 156
root_level 1
chunk_root 22020096
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 375567417344
bytes_used 243939692544
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x161
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 168
uuid_tree_generation 168
dev_item.uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
dev_item.fsid 6bd5c974-2565-4736-815d-fe071f560e68 [match]
dev_item.type 0
dev_item.total_bytes 375567417344
dev_item.bytes_used 248059527168
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
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096)
length 8388608 owner 2 stripe_len 65536 type SYSTEM|DUP
io_align 65536 io_width 65536 sector_size 4096
num_stripes 2 sub_stripes 0
stripe 0 devid 1 offset 22020096
dev_uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
stripe 1 devid 1 offset 30408704
dev_uuid d71e03b8-b353-4242-a65a-dc9d60bc46a6
backup_roots[4]:
backup 0:
backup_tree_root: 350814208 gen: 166 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 340721664 gen: 166 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 354140160 gen: 166 level: 1
backup_csum_root: 353402880 gen: 166 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 1:
backup_tree_root: 57311232 gen: 167 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 69419008 gen: 167 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 317472768 gen: 167 level: 1
backup_csum_root: 345784320 gen: 167 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 2:
backup_tree_root: 340721664 gen: 168 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 340738048 gen: 168 level: 2
backup_fs_root: 338608128 gen: 166 level: 2
backup_dev_root: 345358336 gen: 168 level: 1
backup_csum_root: 353320960 gen: 168 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
backup 3:
backup_tree_root: 57311232 gen: 165 level: 1
backup_chunk_root: 22020096 gen: 156 level: 1
backup_extent_root: 69419008 gen: 165 level: 2
backup_fs_root: 352387072 gen: 157 level: 2
backup_dev_root: 317325312 gen: 165 level: 1
backup_csum_root: 343932928 gen: 165 level: 2
backup_total_bytes: 375567417344
backup_bytes_used: 243939692544
backup_num_devices: 1
Mit freundlichen Grüßen/Kind regards
Felix Koop
> Qu Wenruo <quwenruo.bt...@gmx.com> hat am 22. September 2019 um 11:50
> geschrieben:
>
>
>
>
> On 2019/9/22 下午2:34, Felix Koop wrote:
> > Hello,
> >
> > I need help accessing a btrfs-filesystem. When I try to mount the fs, I
> > get the following error:
> >
> > # mount -t btrfs /dev/md/1 /mnt
> > mount: /mnt: wrong fs type, bad option, bad superblock on /dev/md1,
> > missing codepage or helper program, or other error.
>
> dmesg please.
>
> >
> > When I then try to check the fs, this is what I get:
> >
> > # btrfs check /dev/md/1
> > Opening filesystem to check...
> > No valid Btrfs found on /dev/md/1
> > ERROR: cannot open file system
>
> As it said, it can't find the primary superblock.
>
> Please provide the following output.
>
> # btrfs ins dump-super -fFa /dev/md/1
>
> And kernel and btrfs-progs version please.
>
> Thanks,
> Qu
> >
> > Can anybody help me how to recover my data?
> >
> >
>
