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恢复超级块损坏的磁盘

tag-icon • tag-icon hard-drive bcache
恢复超级块损坏的磁盘

我正在尝试恢复损坏超级块的磁盘，但似乎根本无法卸载该磁盘。我对三个额外驱动器使用了 bcache，重新启动后，其中一个驱动器停止工作。所以我移除了 SSD 缓存驱动器，但似乎仍然无法恢复驱动器

pavs@VAS:~$ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda           8:0    0 149.1G  0 disk 
├─sda1        8:1    0 133.4G  0 part /
├─sda2        8:2    0     1K  0 part 
└─sda5        8:5    0  15.7G  0 part [SWAP]
sdb           8:16   0   2.7T  0 disk 
└─sdb1        8:17   0   2.7T  0 part 
  └─bcache0 251:0    0   2.7T  0 disk /var/www/html/directlink/FTP1
sdc           8:32   0   1.8T  0 disk 
└─sdc1        8:33   0   1.8T  0 part 
  └─bcache1 251:1    0   1.8T  0 disk 
sdd           8:48   0   1.8T  0 disk 
└─sdd1        8:49   0   1.8T  0 part 
  └─bcache2 251:2    0   1.8T  0 disk



pavs@VAS:~$ sudo fsck.ext4 -v /dev/sdd1
e2fsck 1.42.9 (4-Feb-2014)
/dev/sdd1 is in use.
e2fsck: Cannot continue, aborting.


pavs@VAS:~$ umount -l /dev/sdd
umount: /dev/sdd is not mounted (according to mtab)
pavs@VAS:~$ umount -l /dev/sdd1
umount: /dev/sdd1 is not mounted (according to mtab)


 1072.806897] EXT4-fs (bcache2): ext4_check_descriptors: Checksum for group 640 failed (57199!=0)
[ 1072.806900] EXT4-fs (bcache2): group descriptors corrupted!

答案1

尝试使用备份超级块进行修复。您可能需要 livecd 来绕过启动时的自动挂载/fsck。请参阅此处的说明：

http://linuxexpresso.wordpress.com/2010/03/31/repair-a-broken-ext4-superblock-in-ubuntu/

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