SPARC: Installing a Sun StorEdge D2 Storage Array

You can install a single storage array by using a split-bus configuration. You can install two storage arrays by using a single-bus configuration.

Figure 3–24 SPARC: Installing a Sun StorEdge D2 Split-Bus Configuration: An Example

To use a single storage array in a Sun Cluster environment, you must use the split-bus configuration.

As Figure 3–24 shows, the split-bus configuration requires that the storage array contain two Environmental Service Modules (ESM). Each ESM is connected to two nodes. Each ESM controls half the disks in the storage array and the data is mirrored by using a volume manager.

Figure 3–25 SPARC: Installing a Sun StorEdge D2 Single-Bus Configuration: An Example

As Figure 3–25 shows, the single-bus configuration requires two storage arrays that each contain a single Environmental Service Module (ESM). The ESM controls all disks on the storage array in which it is installed and the volume manager implements mirroring between the two storage arrays. Each ESM must be connected to two nodes.