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 TS3500 Tape Library assigned to
an Ultrium 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 Ultrium 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.
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 TS3500 Tape
Library can use the MIB to interpret
problem alerts that are transmitted by
SNMP traps.
manual cleaning
A method by which an operator selects a
menu option from the touchscreen of the
TS3500 Tape Library or IBM System
Storage Tape Library Specialist Web
interface to perform cleaning on one or
more of its tape drives.
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 Ultrium tape
cartridge, a 2-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 (1 represents
the Ultrium 1 tape cartridge, 2 represents
the Ultrium 2 tape cartridge, 3 represents
the Ultrium 3 tape cartridge, T represents
the Ultrium 3 WORM tape cartridge), 4
represents the Ultrium 4 tape cartridge, U
represents the Ultrium 4 WORM tape
cartridge, 5 represents the Ultrium 5 tape
cartridge, and V represents the Ultrium 5
WORM tape cartridge.
medium
A physical material in or on which data
may be represented, such as magnetic
tape.
Medium Changer assembly (MCA)
In the enhanced frame control assembly
power structure, the device that facilitates
communication between host applications
and the library. The MCA is located above
the drives and the fixed power trays in
Model L23, D23, L53, and D53 frames. It
houses two Ethernet ports for connection
to the Tape Library Specialist Web
interface or a system console.
244 IBM System Storage TS3500 Tape Library with ALMS: Introduction and Planning Guide
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