HP ESA10000 User Manual download pdf (Page 36)

RA7000 / ESA10000 High Availability Solution Kit for HP-UX

A–4 EK–HAHPU–MH. B01

NOTES

Repeat these procedures for each new server to

be added to the cluster. When finished, follow

normal procedures to power-up all cluster

devices.

Make sure that each server added to the cluster is

configured for a cluster, according to Chapter 3 of

this guide.

A.1.2 Adding a Second RAID Subsystem to an Existing Cluster

A second RAID subsystem can be added to an existing cluster by building a

second, separate SCSI bus between the existing clustered servers and the new

RAID subsystem. This requires a second SCSI host adapter be prepared and

installed (reference Chapter 1,

Pre-Installation Steps

), in each of the host servers

comprising the cluster. In this scenario, both RAID subsystems can be shared by

all clustered servers. Figure A-1 illustrates the cluster layout when a second

subsystem (and more than two servers) are added to a

Mid-Bus RAID

subsystem

cluster layout.

NOTES

The second RAID subsystem must be configured

as defined in the RoadMap of the

Getting Started

section of this guide.

Follow normal procedures to backup the existing

cluster devices and then power down the cluster

devices prior to connecting the second

subsystem.

Reference Chapter 2,

“Cabling the RAID Subsystem Components”

for the parts

and procedures required to cable and terminate a SCSI bus, integrating the

following differences that apply to the second subsystem:

1. Physically cable the second RAID subsystem to the same two host servers as

the first (existing) RAID subsystem.

2. Connect the Y-cables to the second host adapter in each server.

3. Be sure to terminate both ends of the second SCSI bus.

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HP ESA10000 User Manual Page 36