dumpe2fs

Print the super block and blocks group information for ext2/ext3/ext4 filesystems. Unmount the partition before running this command using umount device. More information: https://manned.org/dumpe2fs.

• Display ext2, ext3 and ext4 filesystem information:

dumpe2fs /dev/sdXN

• Display the blocks which are reserved as bad in the filesystem:

dumpe2fs -b /dev/sdXN

• Force display filesystem information even with unrecognizable feature flags:

dumpe2fs -f /dev/sdXN

• Only display the superblock information and not any of the block group descriptor detail information:

dumpe2fs -h /dev/sdXN

• Print the detailed group information block numbers in hexadecimal format:

dumpe2fs -x /dev/sdXN