AT&T PC 6300 - Placing Low-Level Format and Bad Track Mapping on the Hard Disk

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MAINTENANCE

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Placing

Low-Level

Format

and

Bad

Track

Mapping

on

the

Hard

Disk

Caution:

It

must

be

understood

that

this

procedure

will

destroy

ALL

data

stored

on

the

HDU.

n

l.

Before

running

System

Diagnostics,

you

must

get

the

bad

track

table

listing

located

on

top

of

the

HDU.

^

2.

Turn

off

the

System

Module

and

all

external

devices.

3.

Unplug

the

ac

power

cable

from

the

rear

panel.

4.

Loosen

the

two

screws

that

secure

the

upper

cover.

5.

Slide

the

upper

cover

forward

approximately

1/2

inch

and

lift

it

from

the

System

Module.

6.

Look

at

the

top

of

your

HDU

for

a

piece

of

paper

with

data.

This

is

the

HDU

error

map

which

designates

the

cylinder

number

and

head

number

for

each

bad

track

found

by

the

HDU

manufacturer.

7.

Write

down

each

cylinder

number

and

head

number

pair

on

a

piece

of

paper.

8.

Replace

the

upper

System

Module

cover

and

tighten

the

two

screws

on

the

rear

panel.

Connect

the

ac

power

cable

to

the

ac

wall

outlet.

5-41

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