Here is a note from PP for Linux installation guide:  PowerPath is not compatible with the native Linux device mapper (DM-MPIO). Configuring both products on the same host can cause system instability. EMC recommends that you do not configure the native device mapper on a host on which PowerPath will be installed.  you could use dm-mpio to manage both 3par and EMC storage, of course dm-mpio is not Powerpath when it comes to load-balancing ..but it's an option.
We have a RHEL 5.6 server connected to a VMAX with EMC PowerPath.  We need to zone this same server to an HP 3PAR P10000 V800, which uses the Linux native dm-mpio to manage multi-pathing.  Can PowerPath and dm-mpio coexist on the same Linux Server?  The PowerPath would manage the VMAX devices and the dm-mpio would manage the 3PAR LUNs.  I read in another Forum posting from "Conor" that PowerPath can coexist on the same Linux platform with "other multi-path software" if they each have their own HBAs.  Of course, I can't do that.  I need them to coexist with the same 2 HBAs zoned to both Arrays.        Stuart
Can EMC PowerPath and RHEL 5.6 dm-mpio co-exist on same RHEL platform?