dd if=/dev/sda of=/mnt/backup/boot_sector.imb bs=512 count=1 (E cosi ti sei salvato il boot sector, che fa sempre comodo)
dd if=/dev/sdaX bzip2 > /mnt/backup/riservato_7.bz2
dd if=/dev/sdaY bzip2 > /mnt/backup/win_7.bz2
dd if=/dev/sdaZ bzip2 > /mnt/backup/squeeze.bz2