Simple way for creating disk Image
The simplest way I know for creating disk images under Linux is using dd command. The disk is treated as regular file. Because this is raw coping, it works the same way regardless of disk format, filesystem and data. Disk is copied sector by sector.
For example (in my case), run as root:
#dd bs=8M if=/dev/hda3 of=/home/root/Backups/hda3.img
The [...]