beautypg.com

Remote wake up, Feat, Rj45 – Dell PRECISION 530 User Manual

Page 296: Channel, Rdram, Rimms, Rimm, Remote, Wake up, Rambus

background image

296

Glossar y

w

w

w

.d

e

ll

.co

m

|

s

u

p

p

o

rt

.d

e

ll.c

o

m

The client computer can be remotely shut down and

restarted.

Since PXE is an industry standard, new computers

can easily be added to the network.

RAID

Redundant Array of Independent Disks. A system of

two or more drives working together for performance

and fault tolerance. RAID drives are typically used on

servers and high-end

PCs

.

There are a number of different RAID levels. The

three most common are 0, 3, and 5:

Level 0: Provides

data striping

but no redundancy.

This improves performance but does not provide

fault tolerance.

Level 3: Same as Level 0, but also reserves one

dedicated drive for error correction data, providing

good performance and some level of fault tolerance.

Level 5: Provides data striping at the

byte

level and

also stripe error correction information. This results

in excellent performance and good fault tolerance.

RAM

Random-access memory. The primary temporary

storage area for program instructions and data. RAM

is stored in

chips

on small circuit boards called

SIMMs

,

DIMMs

, or

RIMMs

, that attach to the

system board. RAM, unlike

ROM

, is volatile, which

means that, when you turn off your computer, any

information stored in RAM is lost.

Rambus

Rambus is a memory technology that is designed to

work with existing system board standards as an

alternative to

DRAM

. See also

RIMM

,

RDRAM

, and

DRDRAM

.

RDRAM

Rambus

dynamic random-access memory (

DRAM

). A

memory subsystem that can optimally transfer up to

1.6 billion

bytes

of data per second. The subsystem

consists of

RAM

, the RAM controller, and the

bus

connecting RAM to the

microprocessor

and other

devices in the computer. See also

DRDRAM

.

Remote Wake Up

A standard of

WfM

that provides the ability either to

remotely wake a computer from a low-power sleep

state or to remotely start a computer that is turned

off but connected to a power source. Remote Wake

Up, typically used to conserve power in large network

organizations and to remotely perform

maintenance/configuration operations, must be

supported by an

ACPI

-compatible computer.

Additionally, to start by a network connection, the

network adapter

must support

WOL

. To start by a

telephone connection, the

modem

must support

WOR

.

RIMM

Rambus

in-line memory module. A slim circuit board

containing

RDRAM

chips

. RIMMs are plugged into

sockets on the computer's system board to add

memory to the computer. They typically must be

installed in matched pairs, meaning two sockets

forming a pair must contain RIMMs of identical

capacity, number of RDRAM chips, and speed. See

also

SIMM

and

DIMM

.

RJ45

A form of connector resembling a standard telephone

jack that is typically used to connect

Ethernet

and

Token Ring

network adapters

and cables. Unlike a

telephone jack, an RJ45 connector has eight wires

instead of two, four, or six.

ROM

Read-only memory. Memory that stores data and

programs that cannot be deleted or written to by the

computer. ROM, unlike

RAM

, retains its contents

even after you turn off your computer. Some

programs essential to the operation of your computer

reside in ROM.