Mapping and virtualization settings for HP MA and EMA

LUN mapping or masking and virtualization restrictions apply to HP MA and EMA systems that connect to the system.

The HP StorageWorks configuration interface requires that you assign a unit number to each logical unit (LU) when it is defined. By default, the LUN is the unit number. It is possible for gaps to exist in the LUN range if the unit numbers that are used in the configuration commands are not contiguous. By default, each LUN is visible on all controller ports on both controllers.

LUN masking

The HP MA and EMA systems support the concept of connection names. A maximum of 96 connection names that contain the following parameters are supported:

HOST_ID
ADAPTER_ID
CONTROLLER
PORT
REJECTED_HOST

Note: The system ports must not be in the REJECTED_HOSTS list. This list can be seen with the SHOW CONNECTIONS FULL command.

You cannot use LUN masking to restrict the initiator ports or the target ports that thesystem uses to access LUs. Configurations that use LUN masking in this way are not supported. LUN masking can be used to prevent other initiators on the SAN from accessing LUs that thesystem uses, but the preferred method for preventing such access is SAN zoning.

LU virtualization

The HP MA and EMA systems also provide LU virtualization by the port and by the initiator. This is achieved by specifying a UNIT_OFFSET for the connection. The use of LU virtualization for connections between the HSG80 controller target ports andsystem initiator ports is not supported.