libvirt users - Jan 2010 - Problem creating VM: "tap: not a valid disk type"

Hi,

I am having problems creating VMs in virt-manager.

I have played with different xen hypervisor versions 3.0 & 3.4 (with rpm 
-i --force) but have in principle gone back to the originals. - Though I 
cannot absolutely exclude that something has gone wrong.

In principle I am using rhel 5.4 with the gitco xen 3.4 hypervisor.

Can anybody put me on the right track with the attached error message? 
Note, the storage file I am attempting to use does exist.

Many thanks,
Arik

==Unable to complete install 'libvirt.libvirtError POST operation failed: 
xend_post: error from xen daemon: (xend.err 'Error creating domain: 
Invalid Configuration: tap: not a valid disk type')
Traceback (most recent call last):
   File "/usr/share/virt-manager/virtManager/create.py", line 1485, in
do_install
     dom = guest.start_install(False, meter = meter)
   File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line
628,
in start_install
     return self._do_install(consolecb, meter, removeOld, wait)
   File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line
726,
in _do_install
     self.domain = self.conn.createLinux(install_xml, 0)
   File "/usr/lib64/python2.4/site-packages/libvirt.py", line 1077, in
createLinux
     if ret is None:raise libvirtError('virDomainCreateLinux() failed', 
conn=self)
libvirtError: POST operation failed: xend_post: error from xen daemon: 
(xend.err 'Error creating domain: Invalid Configuration: tap: not a 
valid disk type')
'

On Sat, Jan 30, 2010 at 10:31:46PM +0100, Arik Raffael Funke
wrote:
> Hi,
> 
> I am having problems creating VMs in virt-manager.
> 
> I have played with different xen hypervisor versions 3.0 & 3.4 (with
rpm
> -i --force) but have in principle gone back to the originals. - Though I 
> cannot absolutely exclude that something has gone wrong.
> 
> In principle I am using rhel 5.4 with the gitco xen 3.4 hypervisor.
> 
> Can anybody put me on the right track with the attached error message? 
> Note, the storage file I am attempting to use does exist.
> 
> Many thanks,
> Arik
> 
> ==> Unable to complete install 'libvirt.libvirtError POST operation
failed:
> xend_post: error from xen daemon: (xend.err 'Error creating domain: 
> Invalid Configuration: tap: not a valid disk type')
For some reason this shows that Xen is rejecting the 'tap:aio' disk
access type, which is rather unexpected - probably need upstream
Xen to answer that one

Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|