Configuration interface for IBM^® DS5000, IBM DS4000, and IBM DS3000 systems

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

The access LUN might not be in a partition that contains the system ports because it is not required by the Lenovo Storage V series system. The UTM LUN is a special LUN that allows IBM^® DS5000, IBM^® DS4000™, and IBM^® DS3000 systems to be configured through suitable software over the Fibre Channel connection. Because the system does not require the UTM LUN, it does not generate errors either way. IBM^® DS5000, IBM^® DS4000™, and IBM^® 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^® DS5000, IBM^® DS4000™, or IBM^® 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 the system.