Booting from usb hard disk

[Adam McDougall]

Robert Noland wrote:
> So I have my i386 install on a usb hard disk, which I can only boot on
> one machine now.  The one machine that I can make work has a bios option
> that reads "BIOS ehci handoff".  This used to work with the old usb
> stack.  The machines that it doesn't work on, boot the kernel, but fail
> to mount root, giving me the forbidding mountroot> prompt, which is
> immediately followed by the message saying that da0 is attached.  da0 is
> however not listed in the available boot devices list.  I tried playing
> around with the timeout in vfs_mount.c, but that didn't seem to have any
> impact.  It has been suggested that this may be a "geom" timeout, but I
> don't know anything about the boot system really.
>
> robert.
>
>   
Is this a recent build of -current from the last few weeks?  I seem to 
recall some fixes went in to delay the root mount to address this issue.