HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks Directors and Edge - Page 17

Glossary link incident log Log, displayed through the Product Manager application, that provides a history of Fibre Channel link incidents (with associated port numbers) for an individual director or switch. See also audit log, event log, hardware log, and threshold alert log. load balancing Ability to evenly distribute traffic over multiple interswitch links within a fabric. Load balancing on HP directors takes place automatically. logical port address The port numbering system for a director with the FICON Management Server active. 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. loop initialization primitive (LIP) - In an arbitrated loop device, a process by which devices connected to hub ports (H_Ports) on the arbitrated loop device notify other devices and the switch of their presence in the loop by sending LIP sequences and subsequent frames through the loop. This process allows linked arbitrated loop devices to perform fabric loop port (FL_Port) arbitration as they link through hub ports. 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 analysis procedure (MAP) - A set of procedures that guide maintenance personnel through step-by-step instructions for hardware fault isolation, repair, and verification. maintenance port Connector on the director where a PC running an ASCII terminal emulator can be attached or a dial-up connection can be made for specialized maintenance support. Directors and Edge Switches Glossary 17