document updated 15 years ago, on Feb 27, 2009

Fields:

add extra delay for USB enumeration — I believe some devices initialize and enumerate more slowly than other devices, but I'm not 100% sure about this
boot USB HDD — all steps required to boot into a USB HDD
only USB HDD — is there a way to guarantee that only the USB HDD boots? (as opposed to falling back to the local HDD if(when) the USB drive isn't recognized)

keys

F10	BIOS setup
F9	Choose boot device, for this boot only

extra delay

Just ctrl-alt-del several times. This doesn't reset the USB bus.

boot USB HDD

only USB HDD

keys

F2	BIOS setup
F11	Choose boot device, for this boot only
Ctrl+F9	System recovery

extra delay

no way that I've found

boot USB HDD

Boot > Hard Disk Drives; adjust HDD boot priorities

only USB HDD

F11

setup key	delete
extra delay	enable PXE boot, since this initializes before BIOS setup
boot USB HDD	Boot > Hard Drive BBS Priorities. The option is all the way at the bottom, and it doesn't appear unless the BIOS detects more than one HDD available.
only USB HDD	After changing the drive priority in the BIOS setup, do not exit the setup. Rather, go Save&Exit>Boot Override, choose your drive, and press enter.

setup key	F2
boot USB HDD	BIOS doesn't support USB booting. Use PLoP to chainload to USB, that's about the only thing that can do it. No, GRUB/Ghost/etal don't work, they all require some form of BIOS support to do their job. If you're trying to Ghost a drive, it may just be easier to remove the 2.5" IDE drive and temporarily connect it to a USB enclosure's PCB. Seriously, it's that painful to try to boot.
PXE boot	rapidly press F12 during bootup