[CentOS-virt] Ubuntu 8.04 DomU image from jailtime.org on CentOS 5.2 Dom0

Devraj Mukherjee devraj at gmail.com
Wed Jan 7 05:41:23 UTC 2009

Hi Todd,

Thanks for the message. I got a little bit further but still no joy,
its stops with the following messages. Is it better off installing
Ubuntu in the image?

mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
 [root at sphere auto]#

On Wed, Jan 7, 2009 at 2:58 PM, Todd Deshane <deshantm at gmail.com> wrote:
> On Tue, Jan 6, 2009 at 9:21 PM, Devraj Mukherjee <devraj at gmail.com> wrote:
>> Hello all,
>> I am trying to get an Ubuntu 8.04 image running on my CentOS 5.2 Dom0
>> which so far has only been running CentOS 5.2 DomUs.
>> The image I am trying to run was fetched from jailtime.org (just so I
>> didn't have to go through building an image for myself).
>> The configuration of the DomU is based on what the guys at
>> jailtime.org provided and its as follows
>> name = "redgum"
>> kernel = "/boot/vmlinuz-2.6.18-92.1.22.el5xen"
>> memory = "1024"
>> disk = ['file:/srv/xen/redgum.img,sda1,w']
>> root = "/dev/sda1 ro"
>> vif = [ 'bridge=xenbr0', ]
>> vcpus=4
>> on_reboot = 'restart'
>> on_crash = 'restart'
>> When I start the VM I get the following message
>> 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)
>> As per my configuration I have mounted the image to sda1 and the root
>> is specified for the Kernel. Any one with similar experiences or could
>> point me to the right direction?
> adding a ramdisk= line to your domU config should help.
> Also it is a good idea to also copy /lib/modules/<xen kernel> to the
> guest's /lib/modules.
> Cheers,
> Todd
> --
> Todd Deshane
> http://todddeshane.net
> http://runningxen.com
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