Journalling doesn’t appear to be working on an ext3 file-system.
When booting, the following line appears:
VFS: Mounted root (ext2 filesystem) readonly.
What could be causing the problem?

A.
The file-system is specified as ext2 in /etc/fstab

B.
The kernel does not contain ext3 support

C.
The system was not shut down cleanly

D.
An old version of e2fsprogs is installed

Explanation:
Main cause the that your kernel is not supporting the ext3 filesystem.
To support ext3 filesystem kernel should load the ext3 module.