Glossary

light-emitting diode

LED. A semiconductor chip that emits visible or infrared light when electricity passes through it. LEDs are used on switch or director field-replaceable units (FRUs) and the front bezel to provide visual indications of hardware status or malfunctions.

LIN

See link incident.

link

Physical connection between two devices on a switched fabric. A link consists of two conductors, one used for sending and the other for receiving, thereby providing a duplex communication path.

link incident

LIN. Interruption to link due to loss of light or other causes. See also link incident alerts.

link incident alerts

A user notification, such as a graphic symbol in the Product Manager application Hardware View that indicates that a link incident has occurred. See also link incident.

Link Incident Log

Director or switch 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. The information is useful to maintenance personnel for isolating port problems (particularly expansion port (E_Port) segmentation problems) and repair verification. See also Audit Log; Event Log; Hardware Log; Threshold Alert Log.

LMA

See loader/monitor area.

load balancing

Ability to evenly distribute traffic over multiple interswitch links within a fabric. Load balancing on Hewlett Packard directors and switches takes place automatically.

loader/monitor area

LMA. Code that resides in the loader/monitor area of the control processor (CTP) card. Among other functions, LMA code provides I/O functions available through the maintenance port, operator panel, server interface, terminal window command functions, power up diagnostics, field-replaceable unit (FRU) power-on hours update, and data read/write control, and LMA code/licensed internal code (LIC) download functions (D).

local

Synonym for channel-attached.

logical partition

LPAR. A processor hardware subset defined to support the operation of a system control program, and can be used without affecting any of the applications in another partition (D).