[CentOS] Quation about CentOS 4 xenU kernel

Johnny Hughes johnny at centos.org
Fri Aug 1 14:45:43 UTC 2008


Kai Schaetzl wrote:
> I converted a physical maschine running CentOS 4.6 to a Xen VM on a CentOS 
> 5 host. Almost everything was running when I decided to rsync /lib and 
> /usr a while later in order to get updated files and get the one or two 
> non-working programs to work. There are differences because of the xenU 
> kernel I didn't think about. I forgot to exclude rpm database and 
> /lib/modules.
> Because the synced rpm database doesn't include the xenU kernel anymore I 
> installed the latest one again. I got this warning:
> 
> WARNING: No module ata_piix found for kernel 2.6.9-67.0.22.ELxenU, 
> continuing anyway
> 
> Looking around I don't have this module for the old kernel (2.6.9-67) 
> either. But it's referenced in modprobe.conf. Nevertheless, I could boot 
> the VM. A locate shows this module in all non-xenU kernels under 
> /lib/modules, sometimes in a scsi, sometimes in an ata subdirectory. I 
> still have a backup of the old setup before the sync and this doesn't 
> contain ata_piix in /lib/modules/2.6.9-67.ELxenU/kernel/drivers/scsi 
> either. And no ata directory.
> 
> So, I'm a bit puzzled now. Do I need that module to boot a Xen VM? If not, 
> why is it modprobed? And why do I get this warning from the xenU kernel?

maybe that modules.conf file came from a normal machine and not the xen 
machine.

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