Compaq ProLiant 6500 Compaq Parallel Database Cluster Model PDC/05000 for Orac - Page 110
Cabling Array Controllers to Fibre Channel SAN Switches
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5-14 Compaq Parallel Database Cluster Model PDC/O5000 for Oracle8i and Windows 2000 Administrator Guide Cabling Array Controllers to Fibre Channel SAN Switches In a PDC/O5000 with a redundant Fibre Channel Fabric, a dual redundancy configuration is the minimum allowable configuration that provides redundancy along the I/O paths. This configuration provides two of each component along the I/O paths. These include at least two nodes, two host adapters in each node, and two Fibre Channel SAN Switches. Figure 5-6 shows the correct method for cabling the I/O path components in a dual redundancy configuration. In this example, both Fibre Channel SAN Switches connect to port 1 on one array controller and to port 2 on the other array controller in each MA8000/EMA12000 Storage Subsystem. If one Fibre Channel SAN Switch fails, the other switch still has access to port 1 on one array controller and port 2 on the other array controller in each storage subsystem. This ensures that the host adapters can still access the full range of LUNs. IMPORTANT: Connect lower-numbered array controller ports to lower-numbered Fibre Channel SAN Switch ports. This will simplify path identification as defined by the Secure Path Manager utility. For example, if port 1 of a controller is connected to switch port 3, controller port 2 should be connected to switch port 4 or higher.