[Xen-users] Xen/Dual boot/LVM/block device mapping.

[Adam Carheden <adam.carheden@xxxxxxxxx>]

I need to set up a machine with two distributions on it so that I can
boot either of them with Xen and boot the other as a DOMU. I also want
everything on LVM. Something like:

---------------------------
grub.conf:

title Gentoo/XEN
root (hd0,0)
kernel /xen.gz
module  /kernel-gentoo root=/dev/vg1/gentoo-root
module /initrd-gentoo

title SuSE/XEN
root (hd0,0)
kernel /xen.gz
module /kernel-suse root=/dev/vg1/suse-root
module /initrd-suse
-----------------------------------------

The problem is /etc/fstab. They'll both boot fine as DOM0, but when I
try to boot DOMU with the config:

    disk = [ 'phy:vg1/suse-root,vg1/suse-root,w' ]

I get the standard "can't mount rootfs" complaints from the kernel:

    Root-NFS: No NFS server available, giving up.
    VFS: Unable to mount root fs via NFS, trying floppy.
    VFS: Insert root floppy and press ENTER

When I try it with

    disk = [ 'phy:vg1/suse-root,testdev,w' ]

I get "Error creating domain: int argument required" from xen.

What are the rules about naming block devices in DOMU? Is there any
way I can do this without creating a script to mount and modify fstab
on the DOMU root?

Thanks
--
Adam Carheden

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