CentOS - Mar 2015 - Kernel panic when adding partitioned virtio disk

I have a cloned kvm (that I can now get started following a shutdown
and reboot of the hypervisor host). When it starts with its original
virtio disk there is no problem.  If I create a virtio disk and add it
via virt-manager it also boots without issue, although one cannot see
the new 'physical' disk.  If I shutodwon the kvm guest, partition the
new virtio disk, and reboot the guest then I see this:

Kernel panic - not syncing: Attempted to kill init!
Pid: 1, comm: init Not tainted 2.6.32-504.12.2.el6.x86_64 #1

Call Trace:
 [ffffffff8152933c] ? panic+0xa7/0x16f
 [ffffffff8107a5f2] ? do_exit+0x862/0x870
 [ffffffff8118fa25] ? fput+0x25/0x30
 [ffffffff8107a658] ? do_group-exit+0x58/0xd0
 [ffffffff8107a6e7] ? sys_exit_group+0x17/0x20
 [ffffffff8100b072] ? system_call_fastpath+0x16/0x1b

Does anyone have any idea what partitioning does to cause this
behaviour?  I have deleted and recreated the virtio disk several times
with differing sizes and it always comes down to whether or not the
disk is partitioned.

I have added virtio disks to other kvm guests in the same fashion many
times and have never run into this.

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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
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Hi, James,

James B. Byrne wrote:
> I have a cloned kvm (that I can now get started following a shutdown
> and reboot of the hypervisor host). When it starts with its original
> virtio disk there is no problem.  If I create a virtio disk and add it
> via virt-manager it also boots without issue, although one cannot see
> the new 'physical' disk.  If I shutodwon the kvm guest, partition
the
> new virtio disk, and reboot the guest then I see this:
>
> Kernel panic - not syncing: Attempted to kill init!
<snip>
Now, admittedly, a) I really haven't been following this thread, and b)
haven't worked a lot with VMs, and not with KVM, but could you clarify
something for me? Are you trying to make the virtual root disk larger, or
are you creating a new one, and just adding it the the VM, like mounting
another drive on an existing system? If the latter, can't you mount it?

Oh, and is the new virtual drive formatted?

       mark