>> btrfs-show-super -fa /dev/mapper/VGBIGRAID6-DATA1
> Where is this output?
I had attached it as a separate file. Here it is again:
superblock: bytenr=65536, device=/dev/mapper/VGBIGRAID6-DATA1
---------------------------------------------------------
csum 0xd6fc94ec [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2
label
generation 52059
root 3421559472128
sys_array_size 226
chunk_root_generation 52005
root_level 1
chunk_root 20971520
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 17592186044416
bytes_used 7386753196032
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x163
( MIXED_BACKREF |
DEFAULT_SUBVOL |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
csum_type 0
csum_size 4
cache_generation 52059
uuid_tree_generation 52059
dev_item.uuid 4e582c98-ccfc-4740-8e59-a1cb1cbfca56
dev_item.fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2 [match]
dev_item.type 0
dev_item.total_bytes 17592186044416
dev_item.bytes_used 7661185662976
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 0)
chunk length 4194304 owner 2 type SYSTEM num_stripes 1
stripe 0 devid 1 offset 0
item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
chunk length 8388608 owner 2 type SYSTEM|DUP num_stripes 2
stripe 0 devid 1 offset 20971520
stripe 1 devid 1 offset 29360128
backup_roots[4]:
backup 0:
backup_tree_root: 3421559472128 gen: 52059 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 3421770170368 gen: 52059 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7304828502016 gen: 52059 level: 1
backup_csum_root: 7315970588672 gen: 52059 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753196032
backup_num_devices: 1
backup 1:
backup_tree_root: 7442297503744 gen: 52056 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442294161408 gen: 52056 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442298175488 gen: 52056 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753163264
backup_num_devices: 1
backup 2:
backup_tree_root: 7442289229824 gen: 52057 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442283692032 gen: 52057 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442294063104 gen: 52057 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
backup 3:
backup_tree_root: 7442297503744 gen: 52058 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442284920832 gen: 52058 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442299355136 gen: 52058 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
superblock: bytenr=67108864, device=/dev/mapper/VGBIGRAID6-DATA1
---------------------------------------------------------
csum 0x69cac6a6 [match]
bytenr 67108864
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2
label
generation 52058
root 7442297503744
sys_array_size 226
chunk_root_generation 52005
root_level 1
chunk_root 20971520
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 17592186044416
bytes_used 7386753179648
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x163
( MIXED_BACKREF |
DEFAULT_SUBVOL |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
csum_type 0
csum_size 4
cache_generation 52058
uuid_tree_generation 52058
dev_item.uuid 4e582c98-ccfc-4740-8e59-a1cb1cbfca56
dev_item.fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2 [match]
dev_item.type 0
dev_item.total_bytes 17592186044416
dev_item.bytes_used 7661185662976
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 0)
chunk length 4194304 owner 2 type SYSTEM num_stripes 1
stripe 0 devid 1 offset 0
item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
chunk length 8388608 owner 2 type SYSTEM|DUP num_stripes 2
stripe 0 devid 1 offset 20971520
stripe 1 devid 1 offset 29360128
backup_roots[4]:
backup 0:
backup_tree_root: 7442297978880 gen: 52055 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442297290752 gen: 52055 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442298601472 gen: 52055 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753163264
backup_num_devices: 1
backup 1:
backup_tree_root: 7442297503744 gen: 52056 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442294161408 gen: 52056 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442298175488 gen: 52056 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753163264
backup_num_devices: 1
backup 2:
backup_tree_root: 7442289229824 gen: 52057 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442283692032 gen: 52057 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442294063104 gen: 52057 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
backup 3:
backup_tree_root: 7442297503744 gen: 52058 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442284920832 gen: 52058 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442299355136 gen: 52058 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
superblock: bytenr=274877906944, device=/dev/mapper/VGBIGRAID6-DATA1
---------------------------------------------------------
csum 0x944d9097 [match]
bytenr 274877906944
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2
label
generation 52058
root 7442297503744
sys_array_size 226
chunk_root_generation 52005
root_level 1
chunk_root 20971520
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 17592186044416
bytes_used 7386753179648
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x163
( MIXED_BACKREF |
DEFAULT_SUBVOL |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
csum_type 0
csum_size 4
cache_generation 52058
uuid_tree_generation 52058
dev_item.uuid 4e582c98-ccfc-4740-8e59-a1cb1cbfca56
dev_item.fsid 0397b3eb-fdc4-4d3f-9cc9-d38467dcb6c2 [match]
dev_item.type 0
dev_item.total_bytes 17592186044416
dev_item.bytes_used 7661185662976
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 0)
chunk length 4194304 owner 2 type SYSTEM num_stripes 1
stripe 0 devid 1 offset 0
item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520)
chunk length 8388608 owner 2 type SYSTEM|DUP num_stripes 2
stripe 0 devid 1 offset 20971520
stripe 1 devid 1 offset 29360128
backup_roots[4]:
backup 0:
backup_tree_root: 7442297978880 gen: 52055 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442297290752 gen: 52055 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442298601472 gen: 52055 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753163264
backup_num_devices: 1
backup 1:
backup_tree_root: 7442297503744 gen: 52056 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442294161408 gen: 52056 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442298175488 gen: 52056 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753163264
backup_num_devices: 1
backup 2:
backup_tree_root: 7442289229824 gen: 52057 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442283692032 gen: 52057 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442294063104 gen: 52057 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
backup 3:
backup_tree_root: 7442297503744 gen: 52058 level: 1
backup_chunk_root: 20971520 gen: 52005 level: 1
backup_extent_root: 7442284920832 gen: 52058 level: 3
backup_fs_root: 29556736 gen: 6 level: 0
backup_dev_root: 7254075654144 gen: 52005 level: 1
backup_csum_root: 7442299355136 gen: 52058 level: 3
backup_total_bytes: 17592186044416
backup_bytes_used: 7386753179648
backup_num_devices: 1
On 8/23/16, 5:45 PM, "chris@xxxxxxxxxxxxxxxxx on behalf of Chris Murphy" <chris@xxxxxxxxxxxxxxxxx on behalf of lists@xxxxxxxxxxxxxxxxx> wrote:
On Tue, Aug 23, 2016 at 9:19 AM, Malte Westerhoff
<MWesterhoff@xxxxxxxxxxxxxxxxx> wrote:
> Hi Chris,
> Thanks for the response.
> Yes, there is one large raid6 on which there is one LVM physical volume, which has four logical volumes that each have a btrfs file system.
> Only one of them fails to mount, the other three are fine (data2...4).
> The RAID itself claims to be clean (see below).
>
> Output of btrfs-show-super attached.
>
> btrfs-find-root is running now for 30 minutes. It has produced the following output so far (but is still running – not sure whether it is hanging or will eventually terminate).
>
> quickstore2:~/btrfs-progs # ./btrfs-find-root /dev/mapper/VGBIGRAID6-DATA1
> parent transid verify failed on 7375769206784 wanted 52059 found 52028
> parent transid verify failed on 7375769206784 wanted 52059 found 52028
> parent transid verify failed on 7375769206784 wanted 52059 found 52028
> parent transid verify failed on 7375769206784 wanted 52059 found 52028
> Ignoring transid failure
> leaf parent key incorrect 7375769206784
> Superblock thinks the generation is 52059
> Superblock thinks the level is 1
Huh. Well someone who knows more about Btrfs and devices doing the
wrong thing will have to speak up. To me this looks like something got
the commit order wrong, where the superblock has a more recent
generation than any tree generation, as if the metadata for generation
52059 (or even 52058, 52057, or 52056) is not written or not where
it's supposed to be, and yet the superblock was updated.
>> btrfs-show-super -fa /dev/mapper/VGBIGRAID6-DATA1
Where is this output?
--
Chris Murphy
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