Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/O2000 for Ora - Page 64
Redundant Fibre Channel Arbitrated Loops, GBIC-SW modules installed in Fibre Host Adapters
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2-40 Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide Redundant Fibre Channel Arbitrated Loops A redundant FC-AL refers to the redundant hardware implemented to connect Fibre Host Adapters to a particular set of shared storage devices in a PDC/O2000. Each redundant FC-AL consists of the following hardware: I Two or more Fibre Host Adapters in each node I Two or more Storage Hubs or FC-AL Switches I One or more RA4000/RA4100 Arrays, each containing two single-port RA4000 Array Controllers I GBIC-SW modules installed in Fibre Host Adapters, Storage Hubs or FC-AL Switches, and array controllers to connect Fibre Channel cables I Fibre Channel cables used to connect the Fibre Host Adapters to the Storage Hubs or FC-AL Switches to the array controllers IMPORTANT: For detailed information about cascading two FC-AL Switches, refer to the latest Compaq StorageWorks documentation. This guide does not document cascaded configurations for the FC-AL Switch. A redundant FC-AL consists of from two to four individual loops, each of which traverses a single Storage Hub or FC-AL Switch. The number of loops present is determined by the number of Fibre Host Adapters per node that are dedicated to the redundant FC-AL: two Fibre Host Adapters per node create two loops; four Fibre Host Adapters per node create four loops.