Unable to boot from USB PCI card

[kurac_palac]

Wikipedia's article on live USB states that add-in cards are almost never capable of booting USB but does not say why exactly. Does my motherboard (ASRock G31M-GS R2.0) have a native USB controller? I have this "problem" (booting from a card reader works fine though) - it's more annoying than problematic.

 

[CountMike]

It's just a question of driver for it.

According to: http://www.asrock.com/mb/intel/g31m-gs%20r2.0/
MB has 4 x Ready-to-Use USB 2.0 Ports at the back and 2 x USB 2.0 headers (support 4 USB 2.0 ports) for front or back connectors.

 

[kurac_palac]

What do you mean by driver? I've never heard of installing drivers in BIOS.

According to: http://www.asrock.com/mb/intel/g31m-gs%20r2.0/
MB has 4 x Ready-to-Use USB 2.0 Ports at the back and 2 x USB 2.0 headers (support 4 USB 2.0 ports) for front or back connectors.

If I understand this, the motherboard specification must specifically state that one is able to boot from a PCI card?

 

[CountMike]

It's not driver for BIOS but OS needs to have drivers for USB ports for it to even start BOOT process. Tere is a setting in the BIOS that determines first BOOT device. On most it's stated USB-HDD, while ther's also USB_FDD and USB_ODD (CD/DVD).