Compaq ProLiant 8500 Compaq Parallel Database Cluster Model PDC/05000 for Orac - Page 62
Summary of I/O Path Failure and Failover Scenarios for Redundant FCALs, Table 2-4
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2-38 Compaq Parallel Database Cluster Model PDC/O5000 for Oracle8i and Windows 2000 Administrator Guide Summary of I/O Path Failure and Failover Scenarios for Redundant FC-ALs Table 2-4 identifies possible I/O path failure events for both dual redundancy and quad configurations for a redundant FC-AL and the failover response implemented by Secure Path for each failure. Table 2-4 I/O Path Failure and Failover Scenarios for Redundant FC-ALs Description of Failure A single port on an array controller fails. One array controller in a storage subsystem fails. The Fibre Channel cable connection between an array controller and its Storage Hub is broken. A Storage Hub fails. The Fibre Channel cable connection between a host adapter and a Storage Hub is broken. A host adapter fails. Failover Response The I/O path to the defined backup array controller port takes over all I/O activity. The I/O paths to both ports on the other array controller take over all I/O activity. The I/O path to the defined backup array controller port takes over all I/O activity. The I/O paths for another loop take over all I/O activity. The I/O path from the host adapter in the node that is connected to the defined backup array controller port takes over all I/O activity. The I/O path from the host adapter in the same node that is connected to the defined backup array controller port takes over all I/O activity.