Hi there,
> I am trying to run a new server with centos + xen using centos xen
> packages.
OK. From what you've said I guess this is CentOS 5.0, so it's come with Xen
support, libvirt, virt-manager, etc.
> After installation, we had to install a hardware raid card (areca) on the
> machine, and thus reload the os. It so happens the drivers shipped aren't
> compatible with xen kernel, so i was forced to compile xen from source to
> compile areca drivers.
>
> Now with system running under compiled xen, i cannot boot my old domU image
>
> :(
>
> Here is the error i get
>
> xm create aaa
> Using config file "./aaa".
> Error: (22, 'Invalid argument')
Hmmm, not a very helpful error message! The contents of /var/log/xen/xend.log
may yield more helpful hints.
Out of interest, did you uninstall your old Xen before building a new one?
Sometimes the code of different Xen versions conflicts, which can mess things
up unless the previous copy was properly uninstalled. This is especially a
problem with the tools.
> Also the Virtual Machine Manager under centos has stopped working. Does
> this mean i need to recreate these domU's ? Really confused here on how to
> go about it since the old domU has a lot of data in it, which is required
> and now the machine is down :(
I'm not sure exactly why virtual machine manager would have failed at this
point; but I'm guessing that you've installed a newer version of Xen to that
which CentOS and RHEL 5 shipped. The Xen control interface changed, so your
version of virt-manager doesn't understand it.
CentOS / RHEL 5 ship Xen 3.0.3, with a Xen 3.1 release being planned for their
5.1 update.
> P.S. : Is there a way to compile the areca drivers under the centos xen
> kernel ? I see the only kernel-xen source is available is under centosplus
> repository called kernel-xen-devel-2.6.18-8.1.14.el5.centos.plus. I don't
> see any targets in the areca driver Makefile even, so don't know how it
> will be compiled as well :(
The package kernel-xen-devel should have the stuff required to build modules
against the CentOS / RHEL Xenified kernels. If you could use this to build
your module then you'd be able to go back to using the stardard Xen /
XenLinux packages; you'll get a newer version of Xen when it's added to the
next OS increment release.
> Any help on this will be really appreciated.
Hope that helps.
Daniel: I hope you don't mind, but I've added you to the cc list in case you
had any more specific insights / suggestions here.
Cheers,
Mark
--
Dave: Just a question. What use is a unicyle with no seat? And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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