Modular Smart Array
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HP StorageWorks Modular Smart Array
Basic Multipathing Installation Instructions
First Edition (November 2004)
Part Number: 379632-001
About this Document
This document provides overview and installation information
about the basic multipathing options supported by the Modular
Smart Array 1000 and Modular Smart Array 1500 cs storage
In a multipathing environment, redundant hardware provides
more than one path to the storage. This high availability solution
provides fault tolerance against a single point of failure caused by
a hardware component. Redundant hardware must include two
separate Fibre Channel paths, including two servers, two HBAs
in each server, two switches, two MSA I/O modules, two MSA
controllers, and the duplicate cables needed to connect these
Several multipathing failover options are supported for use with
the MSA1000/MSA1500 cs, including the basic options and the
advanced support delivered with the optional purchase of HP
StorageWorks Secure Path multipathing software.
Basic multipathing failover benefits include:
No additional cost
Simple update to the operating system/HBA driver
Notification and status messages automatically written to
system event logs and the MSA controller LCD display
The basic failover methods work best in relatively simple
multipath environments; complex multipath environments may
benefit from a more advanced solution, such as that provided by
For environments already using Secure Path, no action is
required. There is no need to convert to this more basic level of
In addition to the multipathing information included in this
document, refer to information available under the keyword "MPIO"
on the Microsoft web site: http://www.microsoft.com.
Basic multipathing solutions can not co-exist with any other
multipathing solution, such as Secure Path or AutoPath.
If other failover methods are currently installed in your
environment, HP recommends making no change, and to
continue using that method.
If you choose to migrate to the basic failover method, you
must first un-install all other multipathing software from your
The MSA must be installed in a supported environment, as
detailed in the MSA Compatibility Guide and QuickSpecs.
Review these documents on the MSA web sites: