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Date: Thu, 19 Jan 2012 20:57:11 -0500
From: Kevin O'Connor <kevin@koconnor.net>
Message-ID: <20120120015711.GD16304@morn.localdomain>
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Subject: Re: [Qemu-devel] [SeaBIOS] Error booting from USB Storage Device in
 QEMU-KVM GIT MASTER
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To: 8SScqsnYX8tr@dyweni.com
Cc: seabios@seabios.org, Qemu Devel <qemu-devel@nongnu.org>, Gerd Hoffmann <kraxel@redhat.com>

On Thu, Jan 19, 2012 at 06:57:59AM -0600, Dyweni - Qemu-Devel wrote:
> Hi,
> 
> I am unable to boot KVM using a usb flash drive. I'm using QEMU-KVM
> built
> from GIT MASTER as of this morning.
> 
> 
> Here's my QEMU-KVM startup options:
> 
>  qemu-system-x86_64 \
> 	-curses \
>  	-m 512 \
>  	-snapshot \
> 	-device piix3-usb-uhci \
> 	-drive id=usbflash,file=flash.img,if=none,boot=on,cache=writeback \
> 	-device usb-storage,drive=usbflash \
>  	-net nic,macaddr=$(getmacpublic),vlan=0 -net
> tap,vlan=0,ifname=$publictap,script=no \
>  	-net nic,macaddr=$(getmacprivate),vlan=1 -net
> tap,vlan=1,ifname=$privatetap,script=no \
>  	$*

I tried a modifed version of the above, and it worked fine for me.

qemu-system-x86_64 -snapshot -L test -device piix3-usb-uhci -drive id=usbflash,file=dos-drivec-new,if=none,cache=writeback -device usb-storage,drive=usbflash -chardev stdio,id=seabios -device isa-debugcon,iobase=0x402,chardev=seabios

What version of qemu are you using?  There are a few known quirks in
the seabios code that were fixed recently, but I did not think they
impacted the qemu emulation.

-Kevin