Sun Cluster 3.1 - 3.2 with StorageTek RAID Arrays Manual for Solaris OS

Storage Array Cabling Configurations

You can install your storage array in several different configurations; see Figure 2–1 through Figure 2–4 for examples.

Figure 2–1 StorageTek Array Direct-Connect Configuration

Illustration: Each node has 2 connections to the service
panel. These 2 connections reside on both I/O boards.

The StorageTek 6140 array houses two controllers; each controller has four host ports. The cabling approach is the same as shown in Figure 2–1, but it can support up to four nodes in a direct-attach configuration.

Figure 2–2 StorageTek Array Switched Configuration

Illustration: Each node connects to 2 switches. Each
switch has 2 connections to service panel. Switch connections reside on both
I/O boards.

Figure 2–2 shows a switched configuration for a two-node storage array.

Figure 2–3 Direct Connections from Three Data Hosts with Dual HBAs

Illustration: Each node connects to 3 switches.

You can connect one or more hosts to a storage array. Figure 2–3 shows an example of a direct host connection from each data host with dual HBAs.

Note –

For maximum hardware redundancy, you should install a minimum of two HBAs in each host and distribute I/O paths between these HBAs. A single, dual-port HBA can provide both data paths to the storage array but does not ensure redundancy if the HBA fails.

Figure 2–4 Mixed Topology-Three Hosts Connected Through a Switch or Connected Directly

Illustration: Each node connects to 3 switches.

Figure 2–4 shows that three hosts can be connected directly or through a switch.