Clonezilla is a free software disaster recovery, disk cloning and deployment solution.
You're probably familiar with the popular proprietary commercial package Norton Ghost®. The problem with these kind of software packages is that it takes a lot of time to massively clone systems to many computers. You've probably also heard of Symantec's solution to this problem, Symantec Ghost Corporate Edition® with multicasting. Well, now there is an OpenSource clone system (OCS) solution called Clonezilla with unicasting and multicasting!... More Info »
Clonezilla, based on DRBL, Partclone and udpcast, allows you to do bare metal backup and recovery. There are two types of Clonezilla available: Clonezilla live and Clonezilla SE (server edition).
Clonezilla live is suitable for single machine backup and restore.
Clonezilla SE is for massive deployment, it can clone many (40 plus!) computers simultaneously.
Clonezilla saves and restores only used blocks in the harddisk. This increases the clone efficiency.