Compaq AA-RHGWB-TE manual 32Using Fibre Channel Storage

•In a subsystem with two controllers in transparent failover mode, the controller port IDs increment as follows:

–Controller A and controller B, port 1 — worldwide name + 1

–Controller A and controller B, port 2 — worldwide name + 2

For example, using the worldwide name of 5000-1FE1-0000-0D60, the following port IDs are automatically assigned and shared between the ports as a REPORTED PORT_ID on each port:

–Controller A and controller B, port 1 — 5000-1FE1-0000-0D61

–Controller A and controller B, port 2 — 5000-1FE1-0000-0D62

•In a configuration with dual-redundant controllers in multiple-bus failover mode, the controller port IDs increment as follows:

–Controller A port 1 — worldwide name + 1

–Controller A port 2 — worldwide name + 2

–Controller B port 1 — worldwide name + 3

–Controller B port 2 — worldwide name + 4

For example, using the worldwide name of 5000-1FE1-0000-0D60, the following port IDs are automatically assigned and shared between the ports as a REPORTED PORT_ID on each port:

–Controller A port 1 — 5000-1FE1-0000-0D61

–Controller A port 2 — 5000-1FE1-0000-0D62

–Controller B port 1 — 5000-1FE1-0000-0D63

–Controller B port 2 — 5000-1FE1-0000-0D64

Because the HSG80 controller’s configuration information and worldwide name is stored in nonvolatile random-access memory (NVRAM) on the controller, there are different procedures for replacing HSG80 controllers in an RA8000 or ESA12000:

•If you replace one controller of a dual-redundant pair, the NVRAM from the remaining controller retains the configuration information (including worldwide name). When you install the replacement controller, the existing controller transfers configuration information to the replacement controller.

•If you have to replace the HSG80 controller in a single controller configuration, or if you must replace both HSG80 controllers in a dual-redundant configuration simultaneously, you have two options:

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