floppy Boot from floppydisk
hd / hd1 / hd2 / hd3 Boot from (local) primary / secondary /... harddisk
debug Get shells during process of booting for debugging
-bootchart Create chart of booting sequence in /var/log/bootchart.tgz
forensic Do not touch any harddisks during hardware recognition
serial Activate ttyS0 and start a getty
grub Boot Grub bootloader (special all-in-one-image)