Re: [Xen-users] Best way to convert pv to hvm?

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Tim Post wrote:
> On Tue, 2007-06-05 at 01:08 +0100, Tony Hoyle wrote:
>   
> > Hi,
> >
> > I'm trying to convert a number of PV domains to HVM domains.  The snag 
> > is they're all in separate partitions, so I need to get a unified disk 
> > image.
> > My current plan is to mount the root of dom0 inside a booted domu 
> > (single user mode) and dd the entire contents of the virtual disk 
> > /dev/sda into a file on the dom0 disk.  Is this likely to work?  It's
> > gonna be slow I know due to the dom0->domu->dom0 translation but is 
> > there perhaps a faster way?  I presume xen itself creates a partition 
> > table somewhere and if I could get at that and do it entire thing in 
> > dom0... is this just a python script generating it at runtime or is it 
> > stored somewhere?
> > Tony
> >     
> Why not setup the hvm guests to use nfsroots with a brand spanking new
> unpartitioned image as well? Just fdisk, format, copy over adjust
> config / boot paramaters and reboot.
>
> This also lets you work the neuances you'll need to address in udev and
> others when converting. Well , may need to. I have no idea what you have
> or I'd make more distro specific suggestions.
>
> Just setup the nfs server on dom-0. I don't use HVM much, but I don't
> see any reason why that wouldn't work.
>
> Seems like the easiest way to go for me. Its quite easy to break up var/
> usr/ and the rest doing it like that.
>   
Hmm. You're going to have fun and games with partitioning. If you're 
using a system that does network boot well, it may be feasible to 
pre-transfer your OS images into an appropriately built lfile image or 
partition, then use a "rescue" boot mode to boot ot the console form 
installation sources and successfully set up grub or something else.
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