HP RA7000 manual Adding a Second RAID Subsystem to an Existing Cluster

RA7000 / ESA10000 High Availability Solution Kit for HP-UX

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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.

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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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