Hi,
I know mondo-backup and mondo-rescue. These programs backup partitions at file system level and create iso images. If I remember right, mondo is able to do incremental backups, too.
I use rsync at filesystem level backup tool. With use of the hardlink options, you can do snypshot like backups with low disk usage. Low usage, because in fact the program does incremental backups with only the access comfort of snapshots.
To do backups on partition level, you can use, err, I think it was called parted. I saw it long time ago. A tool like norton ghost. It supports all linux fashioned file systems and (experimental) ntfs. But I am not exactly sure about the programs name...
And I am not sure about accessing raid partitions, here...
Greetz,
Clemente
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