e2image

Save critical ext2/ext3/ext4 filesystem metadata to a file. More information: https://manned.org/e2image.

e2image /dev/sdXN path/to/image_file

e2image /dev/sdXN -

e2image -I /dev/sdXN path/to/image_file

e2image -r /dev/sdXN path/to/image_file

e2image -Q /dev/sdXN path/to/image_file