I suppose you could use the dumpe2fs
utility, to get a dump of ext2/etx3/ext4 filesystme informations.
For instance, something like this might do :
sudo dumpe2fs /dev/sda5 | more
ANd the beginning of the output looks like this, on my computer :
Last mounted on: /
Filesystem UUID: 848446d9-a158-4442-905c-9a9551b0eb1a
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 732960
Block count: 2929846
Reserved block count: 146492
...