Re: [Xen-users] using physical disks with HVM

[Steve Dobbelstein <steved@xxxxxxxxxx>]

"Henning Sprang" <henning_sprang@xxxxxx> wrote on 08/14/2006 11:58:18 AM:

> Hi,
>
> On 8/14/06, Steve Dobbelstein <steved@xxxxxxxxxx> wrote:
> > [...]
> > > It seems qemu is expecting to get a file-based disk. What do I need
to
> > > do to get hvm use a physical disk?
> >
> > I'm using LVM volumes for my HVM disks just fine.  Did you try
specifying
> > the full name of the device with the "/dev/" prefix?  For example:
> > disk    = [
'phy:/dev/data/faitest-client-generic-hvm-disk,ioemu:hda,w']
>
> I just tried that out, and just reused the config file that didn't
> work yesterday, but today it just worked, also with the relative path.

Glad it's working for you.

> No idea what was wrong yesterday, in the meantime the machine was
> turned of for the night, but nothing else changed that I can think of.
>
> Maybe some sepcific kernel modules must be loaded, or something else
> that can make qemu fail with the given error message?

Not having seen this problem myself I can only guess what might be going
wrong.  I doubt it's a kernel module since you said nothing changed with
the setup.  I'm guessing that perhaps qemu has a bug in setting up the disk
or that the Xen domain creation tools have a bug in generating the
appropriate parameters for invoking qemu.  But those are just guesses.

Steve D.


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