multi-boot windows system drive -- best strategy
i'm wondering what would generally be considered the best practice for backing up a system drive that contains two partitions, each with its own version of windows.
i read saving a partition image saves the MBR as well, so i am guessing a sector-by-sector image of the whole drive (=of both partitions) in this case is not necessary and would only take up more HDD space on the back-up medium. is there however another reason i am unaware of, that would support the sector-by-sector backup when it comes to system drives?
what would you recommend, and futhermore, if i were to just use two separate partition backups (there are two partitions on the system drive as mentioned above), is the incremental backup method fool-proof enough for system drives?