我正在嘗試恢復已損壞超級區塊的磁碟，但我似乎根本無法卸載該磁碟。重新啟動後，我將 bcache 用於三個額外的驅動器，其中一個驅動器停止工作。所以我刪除了 SSD 快取驅動器，但似乎仍然無法恢復驅動器
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
嘗試使用備份超級區塊修復。也許您需要 livecd 來解決啟動時的 automount / fsck 問題。請參閱此處的說明：
http://linuxexpresso.wordpress.com/2010/03/31/repair-a-broken-ext4-superblock-in-ubuntu/