Re: [Xen-users] Convert from image to LVM

[Felix Kuperjans <felix@xxxxxxxxxxxxxxxxxx>]

OK it's surely because of this command line: later arguments override earlier ones (if the argument cannot be specified multiple times).

If you use Debian/Ubuntu's update-grub mechanism, remember to alter the root device within the configuring comments in /boot/grub/menu.lst.
You can also use GRUB's edit-method by pressing e while the bootloader is displayed. Ensure that the command line there is correct (should be console=hvc0 root=/dev/xvda1 ro fastboot).

Am 26.06.2010 21:12, schrieb Jonathan Tripathy:

Also, what is very strange is that if I do cat /proc/cmsline from the busybox promt, the output i get is:

console=hvc0 root=/dev/xvda1 ro root=/dev/sda1 fastboot

Very strange why 2 roots are appearing...
On 26/06/10 19:47, Felix Kuperjans wrote:

Where and when exactly does this message appear? From what you've told I guess it is during init, so it would be interesting which messages precede that alert.

Am 26.06.2010 20:41, schrieb Jonathan Tripathy:

Still doing the same thing. I've change root=/dev/xvda1 in menu.lst, and I've changed it to /dev/xvda1 in /etc/fstab and /etc/mtab, however it still can't mount root. it says "ALERT! /dev/sda1 doesn't exist".

Maybe there another file I need to change somewhere in Ubuntu?

On 26/06/10 19:29, Felix Kuperjans wrote:

Should be the /dev/xvdaX devices, too.

Am 26.06.2010 20:27, schrieb Jonathan Tripathy:

Thanks Felix,

What should fstab and mtab point to?

On 26/06/10 19:23, Felix Kuperjans wrote:

The root= parameter in pygrub should rather point to /dev/xvda1 than to /dev/hda1 if you use PV domains.

Am 26.06.2010 20:16, schrieb Jonathan Tripathy:

By changing the config from xvda to sda, it work normal. However I wish to use xvda as I think it's te "standard" for the future..

So clearly there is some setting in my Ubuntu that is still making it look for sda1 instead of hda1. It's as if it's ignoring the "root=" argument in pygrub...
On 26/06/10 19:09, Jonathan Tripathy wrote:

Hi Everyone,

I'm trying to convert my Ubuntu PV Guest from image based disk to LVM. It uses pygrub.

What I did, was I created a new LV and used dd to copy the contents of the image over to the LV. I then changed the domU config file to use phy:/

Now, when I start the DomU, the kernel boots, however it can't seem to mount root properly. It says that /dev/sda1 doesn't exist. What is strange is that in the Dom0, I mounted the LV and changed the root= parameter of the kernel line to point to /dev/hda1, however the previous error still shows

Any ideas?

Thanks

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