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.

dumpe2fs /dev/sdXN

dumpe2fs -b /dev/sdXN

dumpe2fs -f /dev/sdXN

dumpe2fs -h /dev/sdXN

dumpe2fs -x /dev/sdXN