IBM TOTAL STORAGE DS8000 User Manual

Page 346

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background image

A

access

1)

To

obtain

the

use

of

a

computer

resource.

2)

In

computer

security,

a

specific

type

of

interaction

between

a

subject

and

an

object

that

results

in

flow

of

information

from

one

to

the

other.

access-any

mode

One

of

the

two

access

modes

that

can

be

set

for

the

storage

unit

during

initial

configuration.

It

enables

all

fibre-channel-attached

host

systems

with

no

defined

access

profile

to

access

all

logical

volumes

on

the

storage

unit.

With

a

profile

defined

in

DS

Storage

Manager

for

a

particular

host,

that

host

has

access

only

to

volumes

that

are

assigned

to

the

WWPN

for

that

host.

See

also

pseudo

host

and

worldwide

port

name.

ACK

See

request

for

acknowledgment

and

acknowledgment.

agent

A

program

that

automatically

performs

some

service

without

user

intervention

or

on

a

regular

schedule.

See

also

subagent.

alert

A

message

or

log

that

a

storage

unit

generates

as

the

result

of

error

event

collection

and

analysis.

An

alert

indicates

that

a

service

action

is

required.

allegiance

For

zSeries,

a

relationship

that

is

created

between

a

device

and

one

or

more

channel

paths

during

the

processing

of

certain

conditions.

See

also

implicit

allegiance,

contingent

allegiance,

and

reserved

allegiance.

allocated

storage

The

space

that

is

allocated

to

volumes

but

not

yet

assigned.

Contrast

with

assigned

storage.

American

National

Standards

Institute

(ANSI)

An

organization

of

producers,

consumers,

and

general

interest

groups

that

establishes

the

procedures

by

which

accredited

organizations

create

and

maintain

voluntary

industry

standards

in

the

United

States.

(A)

Anonymous

In

the

DS

Storage

Manager,

the

label

on

an

icon

that

represents

all

connections

that

are

using

fibre-channel

adapters

between

the

storage

unit

and

hosts

but

are

not

completely

defined

to

the

storage

unit.

See

also

anonymous

host,

pseudo

host,

and

access-any

mode.

anonymous

host

Synonym

for

pseudo

host.

Contrast

with

Anonymous

and

pseudo

host.

ANSI

See

American

National

Standards

Institute.

APAR

See

authorized

program

analysis

report.

(GC)

API

See

application

programming

interface.

application

programming

interface

An

interface

that

allows

an

application

program

that

is

written

in

a

high-level

language

to

use

specific

data

or

functions

of

the

operating

system

or

another

program.

arbitrated

loop

A

fibre-channel

topology

that

enables

the

interconnection

of

a

set

of

nodes.

See

also

point-to-point

connection

and

switched

fabric.

array

An

ordered

collection,

or

group,

of

physical

devices

(disk

drive

modules)

that

is

used

to

define

logical

volumes

or

devices.

In

the

storage

unit,

an

array

is

a

group

of

disks

that

the

user

designates

to

be

managed

by

the

RAID

technique.

See

also

redundant

array

of

independent

disks.

ASCII

(American

National

Standard

Code

for

Information

Interchange)

The

standard

code,

using

a

coded

character

set

consisting

of

7-bit

coded

characters

(8

bits

including

parity

check),

that

is

used

for

information

interchange

among

data

processing

systems,

data

communication

systems,

and

associated

equipment.

The

ASCII

set

consists

of

control

characters

and

graphic

characters.

(A)

Some

organizations,

including

IBM,

have

used

the

parity

bit

to

expand

the

basic

code

set.

assigned

storage

The

space

that

is

allocated

to

a

volume

and

that

is

assigned

to

a

port.

authorized

program

analysis

report

(APAR)

A

request

for

correction

of

a

defect

in

a

current

release

of

an

IBM-supplied

program.

(GC)

326

IBM

TotalStorage

DS8000:

Messages

Reference

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