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

[Steve Dobbelstein <steved@xxxxxxxxxx>]

"Henning Sprang" <henning_sprang@xxxxxx> wrote on 08/13/2006 02:49:37 PM:

> Hi,
> As a previous thread in
> http://lists.xensource.com/archives/html/xen-users/2006-06/msg01111.html
> tells, it should be possible tun run hvm domains with a physical disk.
> There where other threads about this, but no solution for my current
> problem.
> When I try to use a disk defined as
>
> disk    = [ 'phy:data/faitest-client-generic-hvm-disk,ioemu:hda,w']
>
> (The device is a lvm volume) in my hvm domU, I get the message:
>
> Error: hvm: for qemu vbd type=file&dev=hda~hdd
>
> 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']

My HVM domU config file has:
disk = ['phy:/dev/virt-blkdev-backend/hvm1,ioemu:hda,w',
'phy:/dev/virt-blkdev-backend/usr,ioemu:hdb,r','phy:/dev/virt-blkdev-disk_io_test/hvm1,ioemu:hdd,w']

and it works fine.  The first entry is the domU boot disk with the root
file system partition, the second entry is the read-only /usr file system,
the third entry is a blank disk for testing disk I/O.

Steve D.


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