Redundant Host And Drive Loops - IBM DS4800 User, Installation And Maintenance Manual

Note: The minimum DS4800 configuration is eight partitions. Sixteen-partition and
sixty-four-partition configuration upgrades are available as upgrade options.
Contact your IBM reseller or marketing representative for more information.

Redundant host and drive loops

This section provides examples of DS4800 host fibre channel configurations.
DS4800 host configurations: This section provides the following examples of
DS4800 host fibre channel configurations.
v Redundant host and drive fibre channel loop configurations, as shown in
Figure 63 on page 86
v Single SAN fabric configuration, as shown in Figure 64 on page 87
v Dual SAN fabric configuration, with an additional DS4800 attached, as shown in
Figure 65 on page 87
v Two clusters, as shown in Figure 66 on page 88
Notes:
1. These configurations have host and drive path failover protection and are
recommended for high availability.
2. The following illustrations do not accurately represent the controller locations in
the DS4800.
Chapter 3. Cabling the storage subsystem
85