Veritas Storage Foundation 5.1 SP1 Cluster File System Installation Guide (5900-1510, April 2011)

See also the Veritas Storage Foundation Cluster File System Administrator's Guide
for a description of I/O fencing.
Setting up shared storage: SCSI
Perform the following steps to set up shared storage.
Figure 2-1 shows how to cable systems for shared storage.
Figure 2-1
Cabling the shared storage
SCSI bus
System A System B
Shared disks
Termination
Termination
To set up shared storage
1
Shut down the systems in the cluster.
2
Install the required SCSI host bus adapters and set up the external shared
SCSI storage devices.
3
Cable the external shared storage devices. With cables connected to shared
storage between two systems, you must terminate the two ends of the SCSI
bus on the systems. as shown in the figure.
For more than two systems, disable SCSI termination on the systems that are
not positioned at the ends of the SCSI chain.
Checking and changing SCSI Initiator IDs
The SCSI Initiator IDs for the host bus adapters (HBAs) on each of the systems
that access the shared storage must be unique. So, you may have to change the
HBA SCSI ID on one or more systems if these IDs are the same. Typically, the host
bust adapters (HBAs) for the SCSI devices are shipped with a default SCSI ID of
7. Use the following procedure to check SCSI IDs and change them if necessary.
35Before you install
Setting up shared storage