- Displaying superblock information: sudo dumpe2fs -h /dev/sda3.
- Displaying Information of block groups: sudo dumpe2fs /dev/sda3. This displays information about block groups. ...
- Observing more about superblocks: sudo dumpe2fs /dev/sda4 | grep -i superblock. ...
- Displaying the version of dumpe2fs: sudo dumpe2fs -V.
What is superblock in Linux?
A superblock is a record of the characteristics of a filesystem, including its size, the block size, the empty and the filled blocks and their respective counts, the size and location of the inode tables, the disk block map and usage information, and the size of the block groups.
How do I restore superblock?
How to Restore a Bad Superblock
- Become superuser.
- Change to a directory outside the damaged file system.
- Unmount the file system. # umount mount-point. ...
- Display the superblock values with the newfs -N command. # newfs -N /dev/rdsk/ device-name. ...
- Provide an alternative superblock with the fsck command.
