[dm-devel] dm multipath kernel driver version too old - 2.6.32

[Pasi Kärkkäinen]

On Thu, Dec 31, 2009 at 02:59:26AM -0500, John A. Sullivan III wrote:
> Hello, all.  We are attempting to upgrade our kernel on our VServer
> hosts from 2.6.28 to 2.6.32.1.  After some initial grief, we thought we
> were successful until multipath kicked in and we received an error
> message:
> 
> DM multipath kernel driver version too old
> 
> In the RAID and LVM section of our kernel configuration, we have enabled
> Multipath I/O support.  We have then created modules for Multipath
> target and both I/O Path Selectors (in-flight I/Os and service time).
> 
> We are running fully patched CentOS 5.4.  What have we done wrong?
> Thanks - John
> 

Are you using the dm-multipath rpm that comes with CentOS/RHEL?
I believe that dm-multipath version requires the CentOS/RHEL kernel
(because of the patches Redhat has applied to that kernel).

You might have better luck using the upstream dm-multipath with the
upstream kernel.

-- Pasi