我在 raid6 中有一个 synology nas 驱动器，其中一个驱动器发生故障。我更换了该驱动器，并在电源故障导致存储池崩溃后将另外两个驱动器从 raid 中踢出。我能够将所有驱动器移至另一个系统并重建 raid 和 lvm，但 btrfs 文件系统上存在阻止安装的错误。
我已经运行了 btrfs restore with dry run，并出现了一些预期的文件。我目前得到
mount error
can't read superblock on /dev/mapper/vg1-volume_1.
这是最后一个错误消息，以及无法读取超级块。来自 dmesg
BTRFS info (device dm-1): using crc32c (crc32c-intel) checksum algorithm
BTRFS info (device dm-1): using free space tree
BTRFS critical (device dm-1): corrupt leaf: root=1 block=503087104 slot=23, invalid root flags, have 0x400000000 expect mask 0x1000000000001
BTRFS error (device dm-1): read time tree block corruption detected on logical 503087104 mirror 1
BTRFS critical (device dm-1): corrupt leaf: root=1 block=503087104 slot=23, invalid root flags, have 0x400000000 expect mask 0x1000000000001
BTRFS error (device dm-1): read time tree block corruption detected on logical 503087104 mirror 2
BTRFS error (device dm-1): open_ctree failed
我能清除的最后一个错误来自 https://unix.stackexchange.com/questions/369520/btrfs-super-recover-says-all-superblocks-are-good-but-mount-disagrees
零日志清除了第一个错误。
btrfs rescue super-recover -v /dev/mapper/vg1-volume_1
All Devices:
Device: id = 1, name = /dev/mapper/vg1-volume_1
Before Recovering:
[All good supers]:
device name = /dev/mapper/vg1-volume_1
superblock bytenr = 65536
device name = /dev/mapper/vg1-volume_1
superblock bytenr = 67108864
device name = /dev/mapper/vg1-volume_1
superblock bytenr = 274877906944
[All bad supers]:
All supers are valid, no need to recover
btrfs check --check-data-csum
Opening filesystem to check...
Checking filesystem on /dev/mapper/vg1-volume_1
UUID: c9d2c563-30cb-4b27-b29a-d5f2642597d8
[1/7] checking root items
[2/7] checking extents
Invalid key type(BLOCK_GROUP_ITEM) found in root(202)
ignoring invalid key
--------There are a lot of these
Invalid key type(BLOCK_GROUP_ITEM) found in root(202)
ignoring invalid key
[3/7] checking free space tree
[4/7] checking fs roots
[5/7] checking csums against data
[6/7] checking root refs
[7/7] checking quota groups skipped (not enabled on this FS)
found 37552772378624 bytes used, no error found
total csum bytes: 2551494312
total tree bytes: 7828389888
total fs tree bytes: 4063068160
total extent tree bytes: 754450432
btree space waste bytes: 1181718069
file data blocks allocated: 37548545822720
referenced 37710498009088
btrfs inspect-internal dump-super /dev/mapper/vg1-volume_1
superblock: bytenr=65536, device=/dev/mapper/vg1-volume_1
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0x5be2c7ca [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid c9d2c563-30cb-4b27-b29a-d5f2642597d8
metadata_uuid c9d2c563-30cb-4b27-b29a-d5f2642597d8
label 2019.10.19-07:46:08 v24922
generation 2838041
root 29818880
sys_array_size 129
chunk_root_generation 2793730
root_level 1
chunk_root 21020672
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 39958383427584
bytes_used 37552772378624
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x8000000000000000
compat_ro_flags 0x3
( FREE_SPACE_TREE |
FREE_SPACE_TREE_VALID )
incompat_flags 0x16b
( MIXED_BACKREF |
DEFAULT_SUBVOL |
COMPRESS_LZO |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 18446744073709551615
uuid_tree_generation 2838039
dev_item.uuid 3ce7be34-1a1f-42aa-9330-186edef4841e
dev_item.fsid c9d2c563-30cb-4b27-b29a-d5f2642597d8 [match]
dev_item.type 0
dev_item.total_bytes 39958383427584
dev_item.bytes_used 38619297349632
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
我不知道该怎么做，因为很多选项都有潜在的破坏性。当我将驱动器放在只读 synology 池中时，我可以下载所有关键文件，但无法找出为什么它不能安装在常规 Linux 机器上。