321 Studios GHDX2-2430S-24F4D manual Unique Identifier, 7 ID/LUN Mapping

Galaxy GHDX2-2430S/R-24F4D Installation and Hardware Reference Manual

controllers to synchronize cached data and configuration profile. When the onboard hub is enabled by the enclosure DIP switches, the two (2) host channels on individual RAID controllers are connected internally via bypass. This mechanism provides access routes to a surviving controller in the event of a single controller failure.

•Make sure you select the appropriate host port topology option through the firmware configuration utilities. The available options include:

-Loop Only

-Point-to-point

•If the onboard hub is enabled, the host IDs on the two (2) host channels are associated with specific WWN node names and port names. If a controller fails, the surviving controller will avail itself using the original node names and port names.

•In the event of cable disconnection or RAID controller failure, a valid data link through the existing controller will continue data transfer that was previously served by the failed controller.

4.2.6Unique Identifier

The unique identifier is a user-specified, 16-bit hexadecimal number that is used to generate FC ports’ node names, port names, and also the Ethernet port MAC address. Each subsystem has a factory-assigned hexadecimal number and there is no need to change it unless you accidentally lose the identifier.

4.2.7ID/LUN Mapping

I/O load distribution between the dual-redundant RAID controllers (in the GHDX2-2430R-24F4D) is determined by the host ID/LUN mapping, a process done by associating logical configurations of disk drives with host channel ID/LUN combinations. Different logical groups of drives can be mapped to channel IDs or the LUN numbers under a host ID. For a multi-path configuration, a logical drive configuration can be mapped to different ID/LUN combinations. In this case, the multi-path management software or file locking mechanism is required on the host side. ID/LUN mapping procedures are described fully in the interface-specific firmware Operation Manual.

4-6 Subsystem Connection and Operation