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xen-users
Re: [Xen-users] Error moving DomU image to LVM
> In creating LVMs during the Fedora install. I created the following
> layout;
>
> /dev/sdb
> /dev/sdb1 /boot
> /dev/sdb2 VolGroup01
> /dev/sdb3 VolGroup02
>
> VolGroup00
> LogVol01 swap
> LogVol00 /
>
> VolGroup01
> LogVol00 /guest1
> LogVol01 /guest2
>
> I then used virt-install to create HVMs. However I created them using a
> file system: '/xen/file.img'.
> Later I used the dd command to copy the image as follows: dd
> if=/xen/file.img of=/dev/VolGroup01/guest1
That all sounds sensible.
> I added the following to the config: disk =
> ['phy:VolGroup/guest1,xvda1,w'] and get the following error: Error:
> Device 770 (vbd) could not be connected. Device /dev/VolGroup01/guest1
> is mounted in the privileged domain, and so cannot be mounted by a
> guest.
Well, that suggests you had the filesystem mounted (or somehow "in use", at
least) in dom0. The control tools stop you from starting the domain in this
case as mounting a filesystem in multiple domains simultaneously (or whilst
one is paused / suspended) will produce severe filesystem corruption.
> After rebooting I get this error: fsck.ext3: Bad magic number in
> super-block while trying to open /dev/VolGroup01/guest1
Was this previously a mountable filesystem, configured in /etc/fstab?
Apparently it's not mountable anymore. If what you dd-ed was a *whole disk
image* rather than just a *partition image* then it's not going to be
possible to directly mount this volume anymore. I think this is probably the
case here... if I'm right about that, then you can just remove the line
from /etc/fstab.
> Can I recover from the above if so how? What is the correct procedure to
> convert the image to the LVM?
What you did sounds right, as long as the LV was big enough.
You mapped the LV to xvda1 in the guest - that's a partition. If it's a whole
disk image then that's not going to work. Export it as xvda instead.
> Help is greatly appreciated!
Hope that helps,
Cheers,
Mark
--
Push Me Pull You - Distributed SCM tool (http://www.cl.cam.ac.uk/~maw48/pmpu/)
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