Ibm 6643 User Manual download pdf (Page 114)

Problem

determination

tips

Because

there

is

a

large

variety

of

hardware

and

software

combinations

that

can

be

encountered,

use

the

following

information

to

assist

you

in

problem

determination.

v

Verify

any

recent

hardware

changes.

See

“Hardware

considerations”

on

page

108.

v

Verify

any

recent

software

changes.

See

“Software

considerations”

on

page

107.

v

Verify

that

the

BIOS

is

at

the

latest

level.

See

“BIOS”

on

page

107.

v

Verify

that

the

drivers

are

at

the

latest

levels.

See

“Drivers”

on

page

107.

v

Verify

that

the

Configuration

matches

the

hardware.

See

“System

resource

conflicts”

on

page

109.

v

Verify

that

the

Diagnostics

diskette

is

at

the

latest

level.

See

“File

updates.”

As

you

go

through

problem

determination,

consider

these

questions.

v

Do

diagnostics

fail?

v

What,

when,

where,

single,

or

multiple

systems?

v

Is

the

failure

repeatable?

v

Has

this

configuration

ever

worked?

v

If

it

has

been

working,

what

changes

were

made

prior

to

it

failing?

v

Is

this

the

original

reported

failure?

Important

To

eliminate

confusion,

systems

are

considered

identical

only

if

the

following

are

exactly

identical

for

each

system:

1.

Machine

type

and

model

2.

BIOS

level

3.

Adapters/attachments

(in

same

locations)

4.

Address

jumpers/terminators/cabling

5.

Software

versions

and

levels

6.

Reference/Diagnostics

Diskette

7.

Configuration

options

set

in

the

system

8.

Setup

for

operation

system

control

files

Comparing

the

configuration

and

software

setup

between

“working”

and

“non-working”

systems

will

often

resolve

problems.

File

updates

Use

the

IBM

support

area

on

the

World

Wide

Web

(WWW)

to

download

Diagnostic,

BIOS

Flash,

and

Device

Driver

files.

http://www.ibm.com/support

Adding

adapters

to

the

system

When

adapters

are

added

to

the

system,

an

area

in

memory

has

to

be

allocated

to

run

its

programs.

This

can

be

done

with

either

hardware

switches

or

software

mapping.

If

there

is

a

conflict

in

software

mapping,

then

the

following

may

be

true.

v

The

first

device

to

attach

to

an

IRQ,

DMA,

I/O

Address,

or

RAM

location

will

probably

function.

The

second

device

will

not

be

found.

106

Hardware

Maintenance

Manual

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