User's Manual

Glossary
DLT-V4 Product Specification 43
L
LED Light Emitting Diode.
LGMR Laser Guided Magnetic Recording.
LVD Low Voltage Differential signalling is an electrical signalling system that
can run at high speeds over cheap, twisted-pair copper cables.
M
µM A Micrometer is an SI unit of length. It is defined as one millionth of a metre
(1 × 10
-6
m), equivalent to one thousandth of a millimeter.
MB Megabyte
SI — 1 000 000 bytes or 10
6
bytes. This is the International System of Units (SI)
definition used by telecommunications engineers and storage manufacturers.
1 048 576 bytes - 1024
2
, or 2
20
. This definition is often used in computer science
and computer programming, when talking about the size of files or computer
memory. The reason is that computers use the binary numeral system internally.
Note: For the purpose of this document we are using SI.
MRC Heads Magneto Resistive Cluster Heads. A cluster of small, cost-effective
Magneto Resistive (MR) media heads packed densely together.
ms A Millisecond is equal to one thousandth of a second.
MSE Multi-mode Single-Ended is a signaling alternative for multi-mode SCSI
devices that allows multi-mode SCSI devices to operate while SE SCSI devices are
present on the bus.
MTBF Mean Time Between Failures.
N
Native Capacity The capacity of a given media product in its basic recording
format (without the use of data compression).
Native Mode Refers to the uncompressed storage capacity of a media subsystem.
(See Native Capacity.)
Node In referring to a Fibre Channel network, a node is any device attached to
the network.
P
Parity A method of generating redundant information that can be used to detect
errors in stored or transmitted data.
Peripheral A device added to a system as a complement to the basic central
processing unit (CPU), such as a disk drive, tape drive, or printer.
Port In referring to a Fibre Channel network, a port connects a node to the
network.