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xiaoz #33 我是看到 dmesg 里报以下错误:
```
[204895.191881] I/O error, dev sdc, sector 2273778664 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
[204895.191903] ata3: EH complete
[204921.512269] ata3.00: exception Emask 0x10 SAct 0xc0 SErr 0x2c0100 action 0x6 frozen
[204921.512294] ata3.00: irq_stat 0x08000000, interface fatal error
[204921.512303] ata3: SError: { UnrecovData CommWake 10B8B BadCRC }
[204921.512316] ata3.00: failed command: READ FPDMA QUEUED
[204921.512324] ata3.00: cmd 60/00:30:80:a3:8f/0a:00:87:00:00/40 tag 6 ncq dma 1310720 in
res 40/00:01:00:4f:c2/00:00:00:00:00/00 Emask 0x10 (ATA bus error)
[204921.512347] ata3.00: status: { DRDY }
[204921.512355] ata3.00: failed command: READ FPDMA QUEUED
[204921.512362] ata3.00: cmd 60/a0:38:80:ad:8f/01:00:87:00:00/40 tag 7 ncq dma 212992 in
res 40/00:01:00:00:00/00:00:00:00:00/00 Emask 0x10 (ATA bus error)
[204921.512383] ata3.00: status: { DRDY }
[204921.512402] ata3: hard resetting link
[204921.984605] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
[204922.005205] ata3.00: configured for UDMA/33
```
```
[204922.014647] btrfs_repair_io_failure: 786 callbacks suppressed
[204922.014651] BTRFS info (device sdd): read error corrected: ino 4554117 off 523730944 (dev /dev/sdc sector 2274337728)
[204922.014775] BTRFS info (device sdd): read error corrected: ino 4554117 off 523739136 (dev /dev/sdc sector 2274337744)
[204922.015390] BTRFS info (device sdd): read error corrected: ino 4554117 off 523710464 (dev /dev/sdc sector 2274337688)
[204922.015435] BTRFS info (device sdd): read error corrected: ino 4554117 off 523714560 (dev /dev/sdc sector 2274337696)
[204922.015530] BTRFS info (device sdd): read error corrected: ino 4554117 off 523722752 (dev /dev/sdc sector 2274337712)
[204922.015541] BTRFS info (device sdd): read error corrected: ino 4554117 off 523718656 (dev /dev/sdc sector 2274337704)
[204922.015551] BTRFS info (device sdd): read error corrected: ino 4554117 off 523726848 (dev /dev/sdc sector 2274337720)
[204922.015562] BTRFS info (device sdd): read error corrected: ino 4554117 off 523735040 (dev /dev/sdc sector 2274337736)
[204922.015608] BTRFS info (device sdd): read error corrected: ino 4554117 off 523743232 (dev /dev/sdc sector 2274337752)
[204922.015662] BTRFS info (device sdd): read error corrected: ino 4554117 off 523747328 (dev /dev/sdc sector 2274337760)
```
你看看你的 dmesg 有没有类似日志吧,不放心就跑一遍 scrub