Device Mapper Multipath is a storage target built on top of the core Device Mapper framework of the Linux kernel.

Following are some howto links for Device Mapper Multipath

RHEL / Cent OS HOWTO http://www.centos.org/docs/5/html/5.2/DM_Multipath/

DM-MP HOWTO from Sourceware http://www.sourceware.org/lvm2/wiki/MultipathUsageGuide

Below is an embedded page from the upstream DM-Multipath site. DM-Multipath Refspec http://christophe.varoqui.free.fr/refbook.html

Device Mapper Multipath Workflows

Diagrams