User's Guide

Glossary
Scalar i500 User’s Guide 547
access implementation, while Ultrium is the high capacity
implementation.
LUN (Logical Unit Number) A unique identifier used on a SCSI bus to
distinguish between devices that share the same bus. A LUN can
be an end user, a file, or an application. In storage technology, a
single large storage device might be divided into smaller pieces,
either to make the vast storage space more manageable or
because the storage space is dedicated to different servers, drives,
or applications. When the storage space is divided into smaller
parts, each part is configured with its own SCSI unique identifier,
or LUN.
M
Magazine
A container for removable media storage used in tape
libraries.
Media A material that stores data, such as tapes in cartridges or optical
disks.
Media changer device A SCSI term referring to a tape library or a
partition, including the robot that services it.
Media ID A barcode number attached to a specific piece of media.
Media type A format/size of media, for example, LTO.
Medium See Media.
Mixed media The ability of a library to simultaneously support multiple
types of storage media.
N
N_Port
Node Port. It only has the capability to communicate through an
F-Port. It is a port on a computer, disk drive, and so on, through
which the device does its Fibre Channel communication as a
direct fabric-attached port for use with the point-to-point or
fabric topology. It is identified by a World Wide Name.
NL_Port Node Loop Port. It has the capability to communicate over both
FC-AL hubs and through F_Ports.
O
Online
A status for a component that indicates it is active and available
for use.
Operator Intervention Message See RAS ticket.