Ini pengalaman yang sangat berharga saat melakukan resize partisi pada partisi root (/) di linux. Berikut kira-kita error yang tampil saat proses booting:
…[sdb] No Caching mode page found…[sdb] Assuming drive cache: write through
… Wrong diagnostic page
… Failed to bind enclosure -19
Wellcome to emergency mode! After logging in, type “journalctl -xb” to view …

Berikut langkah untuk memperbaikinya:

  • Firstly, boot into a live CD or USB
  • Find out your partition number by using
    sudo fdisk -l|grep Linux|grep -Ev ‘swap’
  • Then, list all superblocks by using the command:
    sudo dumpe2fs /dev/sda2 | grep superblock
    Replace sda2 to your drive number You should get a similar output like this Primary superblock at 0, Group descriptors at 1-6
    Backup superblock at 32768,
    Group descriptors at 32769-32774 Backup superblock at 98304,
    Group descriptors at 98305-98310 Backup superblock at 163840,
    Group descriptors at 163841-163846 Backup superblock at 229376,
    Group descriptors at 229377-229382 Backup superblock at 294912,
    Group descriptors at 294913-294918 Backup superblock at 819200,
  • Choose an alternate superblock from this list, for this case alternate superblock # 32768
    Now, to check and repair a Linux file system using alternate superblock # 32768: sudo fsck -b 32768 /dev/sda2 -y
    The -y flag is used to skip all the Fix? questions and to answer them all with a yes automatically You should get similar output like this: fsck 1.40.2 (12-Jul-2007) e2fsck 1.40.2 (12-Jul-2007) /dev/sda2 was not cleanly unmounted, check forced.
    Pass 1: Checking inodes, blocks, and sizes
    Pass 2: Checking directory structure
    Pass 3: Checking directory connectivity
    Pass 4: Checking reference counts
    Pass 5: Checking group summary information Free blocks count wrong for group #241 (32254, counted=32253).
    Fix? yes Free blocks count wrong for group #362 (32254, counted=32248).
    Fix? yes Free blocks count wrong for group #368 (32254, counted=27774).
    Fix? yes ………. /dev/sda2:
    FILE SYSTEM WAS MODIFIED
    /dev/sda2: 59586/30539776 files (0.6% non-contiguous), 3604682/61059048 blocks
  • Now try mounting the partition
    sudo mount /dev/sda2 /mnt

Now, try to browse the filesystem with the following commands
cd /mnt
mkdir test
ls -l cp file /path/to/safe/location

  • If you are able to perform the above commands, you have most probably fixed your error.
  • Now, restart you computer and you should be able to boot normally.

Source:
http[:]//www[.]cyberciti[.]biz/faq/recover-bad-superblock-from-corrupted-partition/
https[:]//askubuntu[.]com/questions/828887/cant-install-ubuntu-anymore-no-caching-found

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