Compaq ProLiant 6400R Compaq Parallel Database Cluster Model PDC/05000 for Ora - Page 202

Troubleshooting 7-15 A Cluster Node Cannot Connect to the Shared Drives Verify connections and accessibility between the servers, the Fibre Channel SAN Switches or Storage Hubs, and the MA8000/EMA12000 Storage Subsystem controller enclosures. See "Verifying Cluster Communications" in Chapter 5, "Installation and Configuration." Disk Management Shows Storagesets With the Same Label (Dual Image) To enhance I/O throughput, both ports (1 and 2) on an HSG80 Array Controller can be configured to different storagesets in the MA8000/EMA12000 Storage Subsystem. If a unit_offset value has not been assigned to port 2 on the array controller, then both port 1 and port 2 will see the same storagesets, as will Disk Management. To correct this problem, do the following: I Ensure that the affected array controller is set to multibus_failover mode. Refer to "Verifying Array Controller Properties" in Chapter 5, "Installation and Configuration." I Ensure that port 2 on the affected array controller has been assigned a unit_offset value. This value ensures that port 2 accesses a different range of storage devices than port 1. Refer to "Verifying Array Controller Properties" in Chapter 5, "Installation and Configuration." Device or Devices Were Not Found by KGPSA-BC Device Driver All of the I/O path devices (storagesets) present on one of the I/O paths should be viewable from the SCSI driver entry under the Device Manager. If one or more of these devices cannot be found by the device driver, then you must identify the cause of the problem and correct it.