# /opt/e2fsprogs/sbin/e2fsck -v /mnt/cifs/backup/sdb2.img 
e2fsck 1.41-WIP (27-Apr-2008)
Superblock has an invalid ext3 journal (inode 8).
Clear<y>? yes

*** ext3 journal has been deleted - filesystem is now ext2 only ***

The filesystem size (according to the superblock) is 9371600 blocks
The physical size of the device is 9338882 blocks
Either the superblock or the partition table is likely to be corrupt!
Abort<y>? no

Resize inode not valid.  Recreate<y>? yes

/mnt/cifs/backup/sdb2.img contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
Error while iterating over blocks in inode 1: Operation not supported for inodes containing extents
Recreate journal to make the filesystem ext3 again?
Fix<y>? yes

Creating journal (32768 blocks):  Done.

*** journal has been re-created - filesystem is now ext3 again ***
e2fsck: aborted
# exit