IBM 5000 manual Pci

P

R

pack . Two or more hard disks interconnected to

increase security, performance, or reliability. Commonly

RAID . Redundant array of independent disks.

referred to as a disk array.

RAM . Random access memory.

packet . In data communication, a sequence of binary

digits, including data and control signals, that is

random access memory (RAM) . (1) A storage device

transmitted and switched as a composite whole. The

in which data can be written and read. (2) A stor

data, control signals, and possibly error control

device into which data is written and from which

information are arranged in a specific format. (I)

read in a nonsequential manner.

parallel port . An access point through which a RAS . Reliability, availability, and serviceability. computer transmits or receives data that consists of

several bits sent simultaneously on separate readwires. . To acquire or interpret data from a storag

Contrast with serial port.device, from a data medium, or from another sourc

prompt . A visual or audible message sent by a program to request the user's response. (T)

operating system . Software that controls the

execution of programs and that may provide services

program . (1) A sequence of instructions that a

such as resource allocation, scheduling, input/output

computer can interpret and execute. (2) To design, control, and data management. Although operatingwrite, modify, and test computer programs. (I) (A) systems are predominantly software, partial hardware

implementations are possible. (T)

O

ODI . Open-Data Link Interface.

processor . A functional unit that interprets and executes instructions. A processor consists of at l an instruction control unit and an arithmetic and log unit. (T) See microprocessor and central processing unit.

PCI .

Peripheral

component

interconnect.

read-only

memory

(ROM)

.

Memory

in

which

stored

performance

data

cannot

be

modified

by

the

user

except

und

.

One

of

the

two

major

factors,

together

also EEPROM, EPROM,

and

special

conditions. See

with

facility,

on

which

the

total

productivity

of

a

system

PROM.

depends. Performance is largely determined by a

combination of throughput, response time, and

record .

(1) A

set

of

data

treated

as

a

unit. (

availability.

of

one

or more related data items grouped for

physical

processing.

.

(1) Pertaining

to

actual

implementation

or

location as

opposed

to

conceptual

content

or

meaning.

(1) To

recharge

a

memory

location

in

volati

(A)

(2) Contrast

with

logical.

(A)

refresh .

memory

with

an

electric

current

so

that

it

retains

pin .

or

binary

value.

(2) In

computer

graphics,

the

proc

One

of

the

conducting

contacts

of

an

electrical

connector.

of repeatedly producing a display image on a dis

surface

so

that

the

image

remains

visible.

port .

An

access

point

for

data

entry

or exit. (Contrast

with

connector.)

register .

(1) An integrated circuit that contains 8,

or

32

storage locations, each of which can store

binary

data. See

also

binary.

(2) An

area

that

sto

POST .

Power-on

self-test.

binary

data

while

it

is

being

processed

by

the

power-on

self-test

(POST) .

A

series

of

repeater .

A

device

used

to

amplify or

reshape

si

diagnostic

tests

that

are

run

automatically

by

a

device

when

.

the

video monitors,

a

measure

of

the

power

is

turned

on.

resolution

In

sharpness

of

an

image,

expressed

as

the

number

o

processing

.

The

performance

of logical

lines

and

columns

on

the

monitor

screen

or the

numbe

operations

per

unit

of

area.

and

calculations

on

data,

including

temporary

of

pels

retention

of

data

in

microprocessor

storage

while

the

data

is

memory.

being

operated

on.

ROM .

Read-only

Glossary 181