Cabling Array Controllers To Fibre Channel San Switches - Compaq 112726-001 - ProLiant - 6500 Administrator's Manual

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.