Re: [Xen-users] Guest OS woun't boot

[James Bulpin <james@xxxxxxxxxxxxx>]

On Wed, 2005-05-18 at 08:43, Dominik Heßmann wrote:
> Hello everybody,
> 
> i am a newbie in using Xen.
> The first three tries to install Xen on my Gentoo box
> aren't very successfull. But now i know how to get the
> dom0 Domain running.
> So my Xentoo (Xen + Gentoo = Xentoo) ist coming up.
> 
> My system is configures like this:
> 
> /dev/hda1 = /boot
> /dev/hda2 = /
> /dev/hda3 = LVM-Partition
> /dev/hda4 = SWAP
> 
> /dev/vg01/SYSP = Gentoo System for dom1
> 
> i've createt a lpar /dev/vg01/SYSP where i've copied
> the new Gentoo in.
> Now when i try to start the new Domain i get:
> 
> 
> VFS: Cannot open root device "sda1" 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)

I forget the exact MO for devfs but it's probably the case that devfs
isn't mounted (no initrd to do it here) so /dev/sda1 isn't finding
anything. Try manually mknod'ing /dev/sda1 within the domain disk image.
When devfs does get mounted it will mount over the top of this which
won't cause a problem.

Mark W - I seem to recall you had some comments on the /dev/ issues a
while back?


> 
> 
> The configuration is this:
> 
> # -*- mode: python; -*-
> kernel = "/boot/vmlinuz-2.6.10-xenU"
> memory = 128
> name = "SYSP"
> disk = [ 'phy:vg01/SYSP,sda1,w' ]
> dhcp="dhcp"
> root = "/dev/sda1 ro"
> extra = "3"
> 
> 
> I have tried diffenrent Config like
> disk = [ 'phy:/dev/vg01/SYSP,sda1,w' ]
> or
> root = "sda1 ro"
> or
> root = "/dev/vg01/SYSP ro"
> 
> but it also doesn't work.
> Don't know if there is a problem with devfs used by Gentoo (but dom0 is
> working fine with devfs!).
> Both Kernels (xen0 and xenU) uses the same .config!!!
> 
> I hope, anyone can help.
> Nice greetings,
> 
> Dominik.
> 
> 
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users


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