From mboxrd@z Thu Jan  1 00:00:00 1970
From: malahal@us.ibm.com
Subject: Re: Re: domap (0) failure for create/reload map
Date: Tue, 3 Jun 2008 07:52:16 -0700
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Laurent GEHLEN [list.4.gehlen@gmail.com] wrote:
>    I've find some more info in my /var/log/syslog:
>        kernel: device-mapper: table: 253:12: multipath: error getting device
>        kernel: device-mapper: ioctl: error adding target to table
> 
>    Still no clue ?
> 
>    Laurent

Generally that means the devices you are trying to multipath are in use.
See if LVM has taken over them! What does "dmsetup table" tell you?

--Malahal.