Xen users - Jun 2009 - No disk devices with tap:aio

Hello!

First, I must mention that I am not too experienced with virtual machines, so
please be gentle :-) It''s my first experiment, and I''ve been
working on getting things to work during the past weeks. I''m getting
close, but now it seems I''m completely stuck.

I''m in the process of testing Xen with Open Nebula, but I have run into
some problems. I''m trying to use tap:aio for my disk images, but
unfortunately the guest (Ubuntu 9.04) bombs out to BusyBox due to not finding
the root. I''ve checked /dev, and there are no entries for sda/, hda/ or
even disk/. However, when I use file:, the guest boots fine (well, actually, it
freezes after ''Starting kernel logging'' or something similar,
but that''s another problem). Does anyone have a suggestion on how I
could fix this? It seems rather odd..
(Oh, and if you ask why I just don''t use file:, well, that would mean
recompiling Open Nebula, which currently is not an option for me)

I''m using an old Athlon 1700+, with 512mb RAM, running Ubuntu 9.04 with
kernel 2.6.26-2-xen-686 from Debian.

Thanks in advance for your help!

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