Re: Booting from usb hard disk

On Mon, Mar 30, 2009 at 04:04:17PM +0100, Paul B. Mahol wrote:
> On 3/30/09, Andrew Thompson <thompsa_at_freebsd.org> wrote:
> > On Tue, Mar 24, 2009 at 03:49:32AM -0500, Robert Noland wrote:
> >> On Mon, 2009-03-23 at 19:40 -0300, Nenhum_de_Nos wrote:
> >> >
> >> > I had problem a while ago with via mini itx hardware, that was quite
> >> > close. If I try boot from usb (installed in usb hdd), I get to the point
> >> > of loader not finding my disk.
> >> >
> >> > I then used a small flash disk attached to the ata (44 pin ide) channel
> >> > and formatted /boot in there. this way I get to the point of mount root
> >> > you said, and da0 not being alive soon enough to mount root. list disks
> >> > also couldn't find da0 though.
> >> >
> >> > I tried current from that time, and no good.
> >> >
> >> > if this is solved, I'll be happy to try whatever patch to current. (as
> >> > long as I can install it from another box/or its ata channel, as it
> >> > can't
> >> > boot vanilla 7.1R)
> >>
> >> So, my solution was to set kern.cam.scsi_delay=10000
> >> in /boot/loader.conf
> >
> > The following patch should work. It creates interleaving root hold
> > tokens from the CAM probe to disk_create and geom providor tasting.
> > I had to add a malloc type flag as sleeping isnt allowed at the point I
> > added the token alloc in CAM.
> >
> > http://people.freebsd.org/~thompsa/root_wait.diff
> 
> Hmm, this is supposed to fix issue when trying to boot from usb disk
> with UP kernel?

This is to address the issue where the usb disk hasnt been attached by
the time the root filesystem is mounted. ie, you are booting from usb.

If your problem is different then please say.


Andrew