HP 3PAR Upgrade Pre-Planning Guide

6 VMware ESX Server Guidelines
NOTE: Host persona 11 is the HP-recommended host persona for all supported versions of
VMware ESX with HP 3PAR OS 3.1.2 and later. After HP 3PAR OS 3.1.3 and its MUs, host
persona 6 will not be supported for any VMware ESX version with HP 3PAR storage systems.
For information regarding HP 3PAR host persona support for all supported VMware ESX versions,
see Table 5 (page 12).
VMware ESX/ESXi server - Active/Active, with a path policy of Most Recently Used (MRU),
does not maintain or re-instate balancing of I/O load after a failover/failback multipath event.
This could leave I/O in an unbalanced state, which may yield significant I/O performance issues.
Implementation of an MRU path policy is not recommended by HP. As of ESX 4.0, a third path
policy choice of Round Robin is available. This is the recommended path selection policy on
ESX systems where it is available.
The VMware vCenter Site Recovery Manager and the HP 3PAR Adapter for VMware Site Replicator
require newer versions to be compatible with HP 3PAR OS 3.1.1 or later. For details, see VMware’s
Site Recovery Manager Storage Partner Compatibility Matrix:
VMware
24 VMware ESX Server Guidelines