RE: [Xen-users] DomU boot fails with can't find root on Fedora 6

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ligesh
> Sent: 31 January 2007 13:03
> To: Xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] DomU boot fails with can't find root on Fedora 6
> 
> 
>  I am trying to get Xen running on Fedora 6, which I thought 
> would be easy, but I guess not. I am using the standard image 
> from jailtime.org and my domU configuration file is below. I 
> am using the same kernel of the host itself.
> 
> ------------
>  kernel     = '/boot/vmlinuz-2.6.19-1.2895.fc6xen'
>  ramdisk    = '/boot/initrd-2.6.19-1.2895.fc6xen.img'
>  memory     = 512
>  name       = 'test.vm'
>  vif        = ['vifname=vif-test0,  mac=aa:00:f6:f4:06:1a']
>  vnc        = 0
>  vncviewer  = 0
>  serial     = 'pty'
>  disk       = ['file:/home/test.vm//root.img,sda1,w', 
> 'file:/home/test.vm//vm.swap,sda2,w']
>  root = '/dev/sda1 ro'
>  ------------------
> 
> -------------------
>  Loading dm-zero.ko module
>  Loading dm-snapshot.ko module
>  Making device-mapper control node
>  Scanning logical volumes
>    Reading all physical volumes.  This may take a while...
>      No volume groups found
>        Activating logical volumes
>          Volume group "VolGroup00" not found
>          Creating root device.
>          Mounting root filesystem.
>          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!
> 
> --------------------------
> 
> The above is the error I got. It seems the initrd is 
> searching for volGroup00, which is how the '/' of the HOST is 
> mounted, but I have explicitly given 'root =' in the config 
> file. So I am confused.
> 
>  Is there anyone here who has experienced this beforehand? Of 
> course, I plan to ask in the fedora-xen mailing list too, but 
> for some weird reason, I am not getting their confirmation email.

Probably caused by the fact that you're using the same initrd for your
guest as you do for the host - you should use a separate initrd for your
guest (using the same kernel is fine). My guess is that the initrd is
"messing" with the root argument.

--
Mats
> 
>  Thanks in advance.
> 
> 
> 
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> 
> 



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