96
Glossary
jumper
— Small blocks on a circuit board with two or
more pins emerging from them. Plastic plugs containing a
wire fit down over the pins. The wire connects the pins
and creates a circuit, providing a simple and reversible
method of changing the circuitry in a board.
K
— Kilo-; 1000.
Kb
— Kilobit(s); 1024 bits.
KB
— Kilobyte(s); 1024 bytes.
Kbps
— Kilobit(s) per second.
KBps
— Kilobyte(s) per second.
key combination
— A command requiring you to press
multiple keys at the same time (for example,
<Ctrl><Alt><Del>).
kg
— Kilogram(s); 1000 grams.
kHz
— Kilohertz.
KMM
— Keyboard/monitor/mouse.
KVM
— Keyboard/video/mouse. KVM refers to a switch
that allows selection of the system from which the video
is displayed and for which the keyboard and mouse are
used.
LAN
— Local area network. A LAN is usually confined to
the same building or a few nearby buildings, with all
equipment linked by wiring dedicated specifically to the
LAN.
lb
— Pound(s).
LCD
— Liquid crystal display.
LED
— Light-emitting diode. An electronic device that
lights up when a current is passed through it.
Linux
— A UNIX-like operating system that runs on a
variety of hardware systems. Linux is open source
software, which is freely available; however, the full
distribution of Linux along with technical support and
training are available for a fee from vendors such as
Red Hat Software.
local bus
— On a system with local-bus expansion
capability, certain peripheral devices (such as the video
adapter circuitry) can be designed to run much faster than
they would with a traditional expansion bus. See also
bus
.
LVD
— Low voltage differential.
m
— Meter(s).
mA
— Milliampere(s).
MAC address
— Media Access Control address. Your
system’s unique hardware number on a network.
mAh
— Milliampere-hour(s).
Mb
— Megabit(s); 1,048,576 bits.
MB
— Megabyte(s); 1,048,576 bytes. However, when
referring to physical disk capacity, the term is often
rounded to mean 1,000,000 bytes.
Mbps
— Megabits per second.
MBps
— Megabytes per second.
MBR
— Master boot record.
memory address
— A specific location, usually expressed
as a hexadecimal number, in the system’s RAM.
memory module
— A small circuit board containing
DRAM chips that connects to the system board.
memory
— An area in your system that stores basic system
data. A system can contain several different forms of
memory, such as integrated memory (ROM and RAM)
and add-in memory modules (DIMMs).
MHz
— Megahertz.
mirroring
— A type of data redundancy in which a set of
physical disks stores data and one or more sets of
additional disks stores duplicate copies of the data.
Mirroring functionality is provided by software. See also
guarding
,
integrated mirroring
,
striping
, and
RAID
.
mm
— Millimeter(s).
ms
— Millisecond(s).
MS-DOS
®
— Microsoft Disk Operating System.
NAS — Network Attached Storage. NAS is one of the
concepts used for implementing shared storage on a
network. NAS systems have their own operating systems,
integrated hardware, and software that are optimized to
serve specific storage needs.
NIC
— Network interface controller. A device that is
installed or integrated in a system to allow connection to a
network.
Summary of Contents for PowerVault MD3000
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