Determining if Linux partition is ext2 or ext3 without /etc/fstab info

Question

How do I determine if a partition is ext2 or ext3 if I no longer have a copy of /etc/fstab ?

Here is what I get out of dumpe2fs. I suspect that there is some info here that is relevant. I am guessing that the has_journal feature may mean that this is ext3, but I'd love some confirmation of this.

dumpe2fs /dev/sdb1 | head -15
dumpe2fs 1.41.11 (14-Mar-2010)
Filesystem volume name:   HOME
Last mounted on:          <not available>
Filesystem UUID:          56d1b36b-8bba-4ba3-8133-0007a7536fc0
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal resize_inode dir_index filetype sparse_super large_file
Filesystem flags:         signed_directory_hash 
Default mount options:    (none)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              1970848
Block count:              3939933
Reserved block count:     196996
Free blocks:              347103

score 5 · Accepted Answer · answered Oct 03 '10 at 06:04

5

has_journal means it is ext3.

answered Oct 03 '10 at 06:04

wallyk

1,349

score 1 · Answer 2 · edited Jun 10 '11 at 15:15

1

For ext4 filesystems, use dumpe4fs; it should show extents.

edited Jun 10 '11 at 15:15

Daniel Beck

111,893

answered Jun 09 '11 at 11:21

bubby

11

Determining if Linux partition is ext2 or ext3 without /etc/fstab info

2 Answers2