info about fsarchiver

One free tool you can use for this is [fsarchiver], which <<is a system
tool that allows you to save the contents of a file-system to a compressed
archive file. The file-system can be restored on a partition which has a
different size and it can be restored on a different file-system. Unlike
tar/dar, FSArchiver also creates the file-system when it extracts the data
to partitions. Everything is checksummed in the archive in order to protect
the data. If the archive is corrupt, you just loose the current file, not
the whole archive. Fsarchiver is released under the GPL-v2 license. It's
still under heavy development so it must not be used on critical data.>>,
So, you've been warned. Latest fsarchiver should be in the latest
[SystemRescueCD], although you can obtain it on your favourite recent
distribution.