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ability to create logical libraries makes it
possible for similar and dissimilar hosts
(servers) to share its robotics. As a result,
hosts can simultaneously run separate
applications in separate logical libraries.
logical library bar code label
A specially coded label that can be affixed
to the tops of storage slot columns and
drives inside the TS3500 tape library. The
tape library reads the labels and uses
them to establish the boundaries of one or
more logical libraries.
logical library configuration
A way of using the TS4500 tape library so
that its robotics are shared by
homogenous (similar) and heterogeneous
(dissimilar) servers. The TS4500 tape
library can be partitioned into individual
logical libraries that independently
communicate with individual servers
using individual control paths.
logical unit number (LUN)
A number that is associated with the
target address of a drive. The server uses
the number to identify the address of the
drive.
loop ID
In Fibre Channel technology, the identifier
that the TS4500 tape library assigned to
an LTO or 3592 tape drive. The ID is
based on the drive's physical location
within the library and is used by other
devices in the topology to communicate.
Low Voltage Differential (LVD)
A low-noise, low-power, and
low-amplitude electrical signaling system
that enables data communication between
a supported server and the TS3500 tape
library. LVD signaling uses two wires to
drive one signal over copper wire. The
use of wire pairs reduces electrical noise
and crosstalk.
LTO
See Linear Tape-Open.
LTO cartridge memory (LTO-CM)
Within each LTO data cartridge, an
embedded electronics and interface
module that can store and retrieve a
cartridge's historical usage and other
information.
LTO-CM
See LTO cartridge memory.
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IBM TS4500: Introduction and Planning Guide
LUN
See logical unit number.
LVD
See Low Voltage Differential.
M
m
Meter.
magnetic tape
A tape with a magnetizable surface layer
on which data can be stored by magnetic
recording.
Management Information Base (MIB)
Units of managed information that
specifically describe an aspect of a system,
such as the system name, hardware
number, or communications configuration.
A collection of related MIB objects is
defined as an MIB. The TS4500 tape
library can use the MIB to interpret
problem alerts that are transmitted by
SNMP traps.
management GUI
See TS4500 management GUI.
master console
See system console.
MB
See megabyte.
Mbps Megabits per second.
MCA
See Medium Changer assembly.
MCC
See Medium Changer card pack.
MCP
See Medium Changer card pack.
mebibyte (MiB)
1v048v576 bytes.
media The plural of medium.
media capacity
The amount of data that can be contained
on storage media and expressed in bytes
of data.
media-type identifier
Pertaining to the bar code on the bar code
label of the IBM LTO tape cartridge, a
two-character code (Lx), that represents
information about the cartridge. L
identifies the cartridge as one that can be
read by devices that incorporate LTO
technology; x indicates the generation of
cartridge; T, U, V, and Wrepresent different
generations of WORM cartridges.
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