Booting 7.0 off of USB Flash Card....

John Nielsen lists at
Wed Apr 16 17:41:44 UTC 2008

On Wednesday 16 April 2008 08:55:41 am fredslists at wrote:
> I'm a newbie to FreeBSD and I've installed 7.0 on a USB flash card, but
> I can't seem to boot off of
> it. I don't get an error message, the PC just goes through POST, then
> re-cycles and continues this loop.
> I was able to get OpenBSD to boot off of this flash card, so I know my
> hardware setup is ok.
> A couple other things I tried, from the loader prompt:
> set currdev=disk1s1a:
> load /boot/kernel/kernel
> but I just get BTX halted.
> Just wondering if anyone else has seen this issue?

This is a known issue, especially with USB devices and/or newer hardware. 
Search the archives for btx issues if you want the gory details. A fix 
was committed several weeks ago, but still after the release of 7.0. Try 
using a 7.0-STABLE snapshot from Those images should 
all have the new btx/boot code. You will need to reinstall the boot 
blocks on your usb drive, so starting from scratch with the new CD image 
could be the simplest way to go.



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