btrfs 安装错误“无法读取超级块”

btrfs 安装错误“无法读取超级块”

我在 raid6 中有一个 Synology nas 驱动器,该驱动器出现故障。在电源故障导致存储池崩溃后,我更换了驱动器,并让另外两个驱动器退出了 raid。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。

我已经通过试运行运行了 btrfs 恢复,并显示了一些预期的文件。我目前得到

mount error

can't read superblock on /dev/mapper/vg1-volume_1.

这是最后一条错误消息,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

我能够清除的最后一个错误来自 Btrfs 超级恢复说所有超级块都很好,但安装不同意

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

我不知道如何继续,因为很多选项都具有潜在的破坏性。当我将驱动器放在只读 Synology 池中时,我能够下载所有关键文件,但无法找出为什么不能将其安装在常规 Linux 机器上。

:我也在服务器故障上抄送了这一点。

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