Storage Multi-Pathing choices in HP-UX Serviceguard environments, August 2009

Chapter 8 ”VxVM 4.1, New Style DSFs and HP-UX Native Multipathing” explains how VxVM and

DMP 4.1 interoperate with the new mass storage subsystem.

 EMC PowerPath for HP-UX Version 4.5 Installation and Administration Guide (P/N 300-002-838,

Rev A03)

Describes how to install/uninstall PowerPath with VxVM with specific array types. Describes when

to use PVlinks with PowerPath, and migrating from SecurePath to PowerPath. To obtain a copy of

this document, registration is required at: http://powerlink.emc.com

 EMC PowerPath Version 4.5 Product Guide (P/N 300-002-834 REV A03)

Describes the concepts and features of PowerPath. To obtain a copy of this document, registration is

required at: http://powerlink.emc.com

 EMC® PowerPath® for HP-UX Version 5.1 and Service Pack Releases – Release Notes

(http://www.emc.com/microsites/clariion-support/pdf/300-005-167.pdf)

Typical Cluster Storage Configuration

Physically redundant hardware paths between the cluster nodes and the storage devices are required

for multi-pathing software to provide path failure protection. Redundancy should be implemented on

all 3 layers as shown in the configuration below:

 Each node is equipped with a minimum of two Fiber Channel Host Bus Adapters (HBAs).

HBA-1, HBA-2, HBA-3, and HBA-4

 The Storage Area Network (SAN) is built with 2 Fiber Channel switches.

FC-Switch-1 and FC-Switch-2

The fiber channel connections are numbered 1 through 8 (connection 7 and 8 shown in dashed

lines are only available on arrays with multiple ports per controller)

 The high available storage system is connected to the SAN with a minimum of 2 controllers

Ctr-A and Ctr-B

– Each controller might have multiple ports connected to the SAN.port-1 and port-2