How can I Boot from ext. usb HDD?

[ashnik]

I have bought a ext. hdd case and installed a 40 gb polaris samsung HDD in it. now can i use it to boot a pc?
It has win xp.

 

[vijay_7287]

go to the bios and set the primary boot device to the USB HDD

i hope this works ...

 

[ashnik]

thanks, i'll try in few days, as my USB HDD is qwith a friend