bug on BTX

Miroslav Lachman 000.fbsd at quip.cz
Sat Nov 18 10:33:35 PST 2006

Hi all,

Bruce M. Simpson wrote:
> It would be a good thing to solve the real mode problem, as it would 
> enable FreeBSD to be booted from memory stick, USB CDROM, and within 
> QEMU without resorting to the current workarounds e.g. using GRUB or 
> skipping /boot/loader entirely to boot the kernel directly as I 
> currently do in QEMU virtualization.
> Indeed I recently ran into this myself. Certain 1U machines which I 
> acquired had problems booting from USB CDROM. I traced this back to the 
> USB BIOS trying to LGDT and causing a general protection fault in vm86 
> mode. I worked around this by PXE booting them on a private VLAN with 
> most helpful assistance from dwhite at .

Is there any progress in fixing FreeBSD bootloader to be able to boot 
from USB devices? Any patches available which can I test?
Or are there any possible workaround to make FreeBSD bootable from USB 
flashdrive in any machine? (I can boot from USB flashdrive and USB 
DVD-RW on my home PC and notebook, but can not boot HP DL140 and Sun 
Fire X2100 servers ;[)

Miroslav Lachman

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