HP StorageWorks 2/140 director product manager user guide - Page 221

Glossary logical unit number (LUN) In Fibre Channel addressing, a logical unit number is a number assigned to a storage device which, in combination with the storage device's node port's World Wide Name, represents a unique identifier for a logical device on a storage area network. loopback plug In a fiber optic environment, a type of duplex connector used to wrap the optical output signal of a device directly to the optical input. loopback test Test that checks attachment or control unit circuitry, without checking the mechanism itself, by returning the output of the mechanism as input. LUN See logical unit number. MAC address See Media Access Control address. maintenance port Connector on the director where a PC running an ASCII terminal emulator can be attached or dial-up connection made for specialized maintenance support. managed product Hardware product that can be managed with the HAFM application. For example, the Director 2/64 is a managed product. See also device. management information base (MIB) Related set of software objects (variables) containing information about a managed device and accessed via SNMP from a network management station. Management Services application Software application that provides back-end product-independent services to the HAFM application. Management Services runs only on the HAFM server, and cannot be downloaded to remote workstations. management session A management session exists when a user logs on to the HAFM application. The application can support multiple concurrent management sessions. The user must specify the network address of the HAFM server at logon time. director product manager user guide Glossary-13