Compaq ProLiant 6500 Compaq Parallel Database Cluster Model PDC/O1000 for Orac - Page 30
FCAL Switch, Fibre Host Adapters, Compaq StorageWorks Fibre Channel
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Architecture 2-7 FC-AL Switch One FC-AL Switch can also be installed between cluster nodes and shared storage arrays in a PDC/O1000 cluster to create a non-redundant Fibre Channel Arbitrated Loop (FC-AL). The FC-AL Switch is another device for connecting one Fibre Host Adapter in each node with the array controller in the RA4000/RA4100 Array. The Fibre Host Adapter in each node, the FC-AL Switch, and the RA4000/RA41000 Arrays to which they are connected belong to the same non-redundant FC-AL. The FC-AL Switch 8 supports eight ports. With the addition of the 3-port Expansion Module (PEM), the switch supports 11 ports. For further information, refer to the Compaq StorageWorks Fibre Channel Arbitrated Loop Switch (FC-AL Switch) User Guide. Fibre Host Adapters Fibre Host Adapters are the interface between the cluster nodes (servers) and the RA4000/RA4100 Arrays to which they are connected. As Figure 2-1 shows, a Fibre Channel cable runs from one Fibre Host Adapter in each cluster node to a port on the Fibre Channel SAN Switch, FC-AL Switch, or Storage Hub. RA4000/4100 RA4000/4100 RA4000/4100 Array Array Array Fibre Host Adapter ProLiant Server Node 1 Storage Hub/Switch Node 2 Fibre Host Adapter ProLiant Server Client LAN Switch (Cluster Interconnect) Figure 2-1. Fibre Host Adapters in a two-node PDC/O1000 cluster