acess LUN

Configuration interface for IBM System Storage DS5000, IBM DS4000, and IBM DS3000systems

IBM® System Storage® DS5000, IBM DS4000®, and IBM DS3000 systems include a configuration application.

The access LUN, also known as the Universal Transport Mechanism (UTM) LUN, is the configuration interface for IBM System Storage DS5000, IBM DS4000, and IBM System Storage DS3000 systems.

The access LUN might not be in a partition that contains the SAN Volume Controller ports because it is not required by the SAN Volume Controller clustered system. The UTM LUN is a special LUN that allows IBM System Storage DS5000, IBM DS4000, and IBM System Storage DS3000 systems to be configured through suitable software over the Fibre Channel connection. Because the SAN Volume Controller does not require the UTM LUN, it does not generate errors either way. IBM System Storage DS5000, IBM DS4000, and IBM System Storage DS3000 systems must not have the Access UTM LUN that is presented as LUN 0 (zero).

It is possible to use in-band (over Fibre Channel) and out-of-band (over Ethernet) to allow the configuration software to communicate with more than one IBM System Storage DS5000, IBM DS4000, or IBM System Storage DS3000 system. If you are using in-band configuration, the Access UTM LUN must be configured in a partition that does not include any logical units that are accessed by theSAN Volume Controller system.

Note: In-band is not supported for access to the LUN while in the SAN Volume Controller partition.