Blaisorblade writes:
> On Friday 28 April 2006 23:55, Todd A. Jacobs wrote:
> > I have several empty filesystems, and a Debian bootable ISO. I'm trying
> > the following:
>
> > linux ubd0=root-9629.img ubd1=swap-9629.img \
> > ubd2r=debian-testing-i386-netinst.iso root=/dev/udb2
>
> You're consistently typing udb2 instead of ubd2 (note the exchange of
> letters). That's your error, unless it's only in the mail.
>
> > and getting errors:
>
> > Initializing software serial port version 1
> > ubda: unknown partition table
> > ubdb: unknown partition table
> > ubdc: unknown partition table
> > VFS: Cannot open root device "udb2" or unknown-block(0,0)
> > Please append a correct "root=" boot option
> > Kernel panic - not syncing: VFS: Unable to mount root fs on
> > unknown-block(0,0)
>
> > First of all, I shouldn't have to run fdisk on the filesystems, should
> > I?
>
> No, you shouldn't. But that's unrelated.
>
> > So why is it complaining?
>
> It can't open the rootfs you indicated to it and is complaining for that.
> That's unrelated to fdisk.
>
> > Secondly, why won't it boot from the ISO image?
>
> There's no problem with the ISO, assuming you've compiled in iso9660.
>
> > I've tried
> > root=/dev/udb2 and root=/dev/udb/2 with an equal lack of success.
>
> I'm not sure whether, after using ubd (not udb, uBD), that would work.
> I use the syntax rootfs=/dev/ubda, which for your case would become
> rootfs=/dev/ubdc.
Note that rootfs must be given a device on the host, not in the guest.
When you use rootfs, you don't need root: rootfs implies root=/dev/root
So that'll be:
rootfs=debian-testing-i386-netinst.iso \
ubd0=root-9629.img \
ubd1=swap-9629.img \
ubd2r=debian-testing-i386-netinst.iso
Note also that inside the guest we don't see a /dev/ubd0, but a
/dev/ubda, /dev/ubdb, etc as shown in the above error messages of the
kernel. So put in the guest /etc/fstab:
/dev/ubda /mnt/root ext3 noatime 0 0
/dev/ubdb /mnt/swap swap sw 0 0
/dev/ubdc / ext3 ro 0 0
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