Western Digital AC280, WDAC140 Technical Reference Manual

Caviar WDAC140lAC280

40

and 80 Megabyte

3.5 -inch drive

eee

WESTERN

DIGITAL

Information furnished by Western Digital Corporation is believed to be accurate and reliable. 'However, no responsibility patents or otherwise under any patent tion reserves the right to change specifications

or

is

assumed

other rights of third parties which

by

Western Digital Corporation for its use; nor for. any infringements of

or

patent rights of Western Digital Corporation. Western Digital Corpora-

may

'result from its use. No license.is granted by implication

at

any time without notice.

Western Digital, AutoSwitch, and Paradise are registered trademarks and

L.at>,

Hyperseek, Interarchitecture, PinScan, Piranha, SAM, Tidbit, and TrueShadeare trademarks of Western Digital Other marks may be mentioned herein that belong to other companies.

Western Digital Corporation Western Digital Plaza,

For

Service

(714) 932-4900

Corporation.

and

Literature, call:

8105 . Irvine Center Drive, Irvine, CA 92718

Cache Flow, Caviar,

FIT.

CONTENTS

1.0

2.0

DESCRIPTION

1.1

1.2

SPECIFICATIONS

2.1

2.2

2.3

2.4

2.5

2.6

2.7

AND

FEATURES General Advanced

Performance Physical

2.2.1

2.2.2

2.2.3 Electrical

2.3.1

2.3.2

2.3.3

2.3.4

Environmental

2.4.1

2.4.2

2.4.3 Agency Reliability Compatibility

Description

Product Cache Automatic Advanced Embedded Dual Intelligent Translation Error Guaranted

........

Specifications

Physical Weight Mechanical

Specifications 12VDC Ripple Power Grounding

Shock Temperature Atmosphere

Approvals

Specification

Alpha Benchmark Peripheral Host Operating

Features

Flow

Drive

Recovery

Specifications

Per

Tests

Compatibility

...

Head

Parking

Defect

Management

Sector

Servo

Operation

Drive

.....

. . . . .

Compatability

. . .

Dimensions

.....

Specifications

and

5VDC

Typical

........

Connectors

.....

and

Vibration

and

Humidity

Pressure

......

. . . . .

Functional

. . . . . . . .

Tests

Compatibility

System

Compatibility

...

and

. . . . . . . .

Tests

Control

. .

.

Current

Cables

.

. .

.

Integrity

Tests

. . . . .

.

Testing

Tests

9 9

9

·

10

·

11

·

11

.12

.12 .13

·

13

.14 .15 .15 .16

·

16

·

16

1

2

2 2 2 2 2 2

3

5 5

6

7 7

B

Western Digital Corporation

Caviar

ACl40IAC280 Technical Reference

Manual

3.0

4.0

PRINCIPLES

3.1

3.2

3.3

ADVANCED

4.1

4.2

4.3

4.4

4.5

OF Block Drive

3.2.1

3.2.2

3.~.3

3.2.4

3.2.5

3.2.S

3.2.7

3.2.8 Head

3.3.1

3.3.2

3.3.3

3.3.4

3.3.5

3.3.S

PRODUCT

CacheFlow........

4.1.1

4.1.2

4.1.3

4.1.4

4.1.5 Defect

4.2.1

4.2.2 Error

Recovery Translation Dual

Drive

OPERATION

Diagram

Electronics

WD42C22 Buffer WDSOC11 WD10C23 Microprocessor Pulse Spindle Actuator

Disk

Assembly Base/Cover Spindle Disk Headstack Read/Write Actuator Flex Voice Air

Purpose Benefits CacheFlow Sequential Repetitive

Management

Defect Format

Option

Winchester

RAM

Servo Data

Detector

Motor

Driver

Motor

Stack

Arm

Circuit

Coil

Assembly

Filtration

FEATURES

of

Mode

Management

Characteristics

. . . . . . . . . . .

..........

Disk

Controller

......

Controller Separator ROM

and

..

Driver

...

(HDA)

Assembly

Assembly Assembly

Heads

System

CacheFlow

Cache Operation

Mode

and

. . . . . .

. .

Assembly

. . . .

..

Flow

..

Format

.

. .

RAM

Characteristics

·

17

.17

.

·

18

·

18

·

18

·

19

·

19

·

19

·

19

.20 .20 .22 .22 .22 .23 .23 .23 .23 .23 .24 .24

.25 .25 .25 .25

.26

.28 .28

.29

.29 .29

.30

·

31

·

31

ii

Western Digital Corporation

5.0

HOST

INTERFACE

5.1

5.2

5.3

5.4

5.5

5.6

AND

J2

Assignments

Host

Interface

5.2.1

5.2.2

5.2.3

5.2.4

5.2.5

5.2.6

5.2.7

5.2.B

5.2.9

5.2.10

5.2.11

5.2.12

5.2.13 Caviar

5.3.1

5.3.2

5.3.3

5.3.4

5.3.5

5.3.6

5.3.7

5.3.B

5.3.9

5.3.10

5.3.11

5.3.12

5.3.13

5.3.14

5.3.15 Host Host Error

Register Data Error Write Sector Sector Cylinder SDH Status

Command Alternate Fixed Digital

AC14O/AC2BO

Recalibrate Seek Read Write Format Read Executive Set Read Write Set Read Write Identify Set

Interface Interface Reporting

AT

COMMAND

.....

Registers

Address Register Register

Precompensation

Count Number

low/Cylinder

Register

Status

Disk

Input

(70H)

Sector

Track

Verify

Drive

Parameters

Multiple

Buffer

Drive

Buffer

Read Write

......

Map

. . . .

Register

....

Register

Control

Diagnostics

Mode

Register

Commands

(10H)

...

(20H)

(30H) (50H)

(4OH)

(C4H)

(C5H)

(C6H)

(E4H)

(EBH)

(ECH)

(EFH)

liming

SET

Register

. . . . .

. . . .

High

Registers

.

...

.

...

(90H)

(91

H)

. . .

.

.33 .33 .39 .39

.40 .40

.42 .42

.43 .43

.44

. . .

.45

.46 .46 .46

.47

.49 .49

.50

.51 .52

.53

.54

.55

.56

.57

.58 .59 .60

.61 .62

.64

.65 .66

.67

Western Digital Corporation

Caviar AC140lAC280 Technical Reference Manual

6.0

INSTALLATION

6.1

6.2

6.3

6.4

6.5

6.6

AND

Unpacking.........

6.1.1

6.1.2

6.1.3

6.1.4 Mounting

6.2.1

6.2.2 Installation

6.3.1

6.3.2

6.3.3 Installing

6.4.1

6.4.2 Installing Setup

Procedures

6.6.1

6.6.2

6.6.3

6.6.4

6.6.5

6.6.6

SETUP

PROCEDURES

Handling

Inspection Removal Removal Moving

Restrictions

Orientation........

Screw Determining

Dual Jumper

the Mounting Cabling

the Preparing

Selecting Partitioning High-level Preparing Booting

Precautions

of

Shipping

From

Shipping

From

Antistatic

Precautions

. . . .

Size

limitations

Configuration

Your

Installations

Settings

Caviar

Drive

The

Drive

and

Installation

Adapter

Card

. . . . . . . . .

the

Caviar

Drive

Tables

the

Drive

Formatting

the

Caviar

the

System

. . . . . .

Configuration

.

....

.....

Drive

.

Container

Bag

.

. . .

. .

...

.

Steps

For

Use

.....

. . . . . .

.....

for a Novell

..........

Network

.

.69 .69 .69 .69 .69

.70 .70 .70 .70 .70

·

71

·

71

·

71

.72

.73 .73 .73

.77 .77 .77

.78

.79 .79

.80 .80

7.0

8.0

9.0

10.0

iv

MAINTENANCE

WESTERN

TROUBLESHOOTING

GLOSSARY

DIGITAL

DRIVE

Technical

....

UTILITY

Support

........................

. . . . . . .

Bulletin

Board

81

.83 .83

.85

.87

Western Digital Corporation

FIGURES

Figure Figure

Figure Figure Figure Figure

2-1. 2-2.

3-1. 3-2.

4-1. 5-1. 5-2. 5-3.

6-1. 6-2. 6-3. 6-4.

Caviar

+

12V

Block Mechanical

CacheFlow Standard Host Host

Jumper

Standard

Caviar Adapter

TABLES

AC140/AC280

Current

Diagram

Read Write

Draw

Exploded

Algorithm

Factory

Settings

Factory

Connector

Cabling

Connectors

Timing

Connectors locations

.....

. . . . .

Mounting

During

Spin

View

. . .

. . . .

Dimensions

Up

(Master

Mode)

. 8

.

10

.17

.21 .27

.33 .65 .66

.73 .74 .75 .76

Table Table Table Table Table Table Table Table

5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 5-8.

J2

Descriptions

AT

Host

Electrical

Data

BusSDO-16, Schmitt Task Standard Identify Error

Trigger

File

Map

Drive

Reporting

Characteristics

INTRQand

Inputs

. . . . . .

Command

.....

Western Digital Corporation

. . . . . . . . . . . .

. . . . . .

lOR,

lOW

Opcodes

I/OCS16

Circuit

CircuitA

B

.34 .36 .37

.38

.39

.48

.63 .67

v

Caviar AC140lAC280 Technical Reference Manual

Radio Frequency Interference

This

Western Class B computing not

guarantee

Western caused

If

interference manual the

computer

AC

power

This

digital apparatus of

Communications.

Digital

device

that

Digital

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by

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system

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out

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Some

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Part

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15,

subpart

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product.

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to

comply

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of

individual

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system

include

radio.

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installations.

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ipment

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relocation

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Canadian

Department

for

a

This

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owner's

of

computer

for

digital

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Western Digital Corporation

Description

and

Features

1.0

DESCRIPTION AND

1.1

General Description

The

Caviar

series

storage

AT-compatible

unsurpassed Caviar

disk buffer dramatically performance of chipset. means

Caviar shipment, logical/physical control

in a 3.5-inch

features

caching

and

less

than

Caviar

even drives

data

adapts

80386,

17

faster

ensuring

on

of

Western

form

systems,·

reliability

system,

enhance

milliseconds.

are

and

Cache

Flow,

which

during

read/write

80386SX,

achieves

system

preformatted

defect-free

address

each

track,

FEATURES

Digital

intelligent

factor

and

low

profile

Caviar

higher

translation,

is

the

premier

optimum

Western dynamically

disk

performance.

and

performance.

Digital's

operations

performance.

and

80486

When

coupled

data

transfer

(low-level),

media.

56-bit

error

partitions

Additional

automatic

systems,

drives

provides

1-inch

storage

exclusive

the

to

the

To Caviar

with

Western

rates

with

and

defects

Caviar

head

correction

42/85

megabytes

height.

Designed

solution

multi-segmented

8-Kbyte optimum meet

the

has

Digital's

zero

are

features

parking,

code.

that

(32-Kbyte

caching

demands

an

average

7600

wait

states,

mapped

include

embedded

for

use

achieves

adaptive optional) mode

of

high

seek

time

core

logic

which

out

before

linear

servo

of

in

to

Western and

including functions, each knowledge between and

Digital

manufacturing

storage,

arena

component

build

in

Western Digital Corporation

offers

are

integrated

work

closely

of

all

the

exclusive

reliable,

in a process

intelligent

components

designers

functionality.

cost-effective

drive

into a variety

with

known

control.

each

other,

that

means

storage

as

"interarchitecture." core

of

platform-specific

developing

interact

Western

solutions

logic,

in

the

Digital

by

video,

and

solutions.

solutions

platform.

can

guarantee

integrating Critical

communication

with a first-hand

This

design

functions,

Designers

interaction

compatibility

in

1

Caviar AC140lAC280 Technical Reference Manual

1.2

Advanced

Product

Features

CacheFlow

Designed

rotational

multi-segmented

size

is

Caviar's

selects

exclusively

latency

of

the

data

sequential,

8-Kbyte

the

appropriate

by

delays,

disk

caching

request

random,

(32-Kbyte

Western

but

or

caching

Automatic Head Parking

Head

parking power-down, position,

is

automatic

the

heads

improving

data

integrity

Advanced Defect Management

The

Caviar

is

preformatted complement manufacturing out

with

modifications

of

defect

process,

Western

are

required

management

media

Digital's

Digital

to

minimize

CacheFlow

system.

the

type

of

repetitive.CacneFJow

optional)

with

retract

(low

high

before

RAM

mode

the

to a safe,

and

resistance

level)

at

characteristics.

defects

performance

installation.

is

CacheFlow

data

request,

buffer

for

optimum

Caviar

the

found

series

non-data

factory

during

defect

disk-seeking

the

industry's

constantly

that

is,

then

dynamically

into

equal-sized

system

of

landing

to

shock.

and

comes

Extensively

intelligent

management

operations

first

adaptive,

evaluates

whether

performance.

intelligent

zone

equipped

burn

not

the

application

partitions

segments

drives.

and

with a full

tested

during

in

are

technique.

and

only

the the

and

On

lock

into

the

mapped

No

2

Embedded Sector Servo Control

The

Caviar

records

servo.

servo

data

on

every

sector

Dual Drive Operation

The

Caviar

and

configuration

supports

dual

drive

options

operation

for

master

or

by

slave

InteUigent Drive

The

Caviar

does

not

require a slot-mounted

controller

circuitry

and

4O-pin

ATA

IDE

connector

for

precise

means

of a "daisy

drive

designation.

controller

attached

head

card.

directly

positioning

chain"

cable

The

hard

to

assembly

disk

the

drive.

by

has

Western Digital Corporation

the

Translation

The

Caviar

provides a linear addresses compatibility

to

physical

to

any

drive

disk

sector

set-up

parameter.

Error Recovery

Caviar

uses a 56-bit

correction

of

errors

in

Error

the

Correction

data

field.

Guaranteed Compatibility

Western (FIT operating

Lab)

Digital

performs

to

ensure

systems.

extensive

compatibility

address

addresses

Code

testing

with

in

all

AT-compatible

Description

translator

which

(ECC)

means

for

its

Functional

and

to

convert

Caviar

automatic

Integrity

computers

Features

logical

detection

sector

guarantees

Testing

and

Labs

standard

and

Western Digital Corporation

3

Caviar AC140lAC280 Technical Reference Manual

4

Western Digital Corporation

SpecifICations

2.0

SPECIFICATIONS

2.1

Performance

Average Track-to-Track Maximum Index Average Rotational Controller Data Data

Interleave

Buffer Error

Error Spindle

Spindle Start/Stop Acoustics···

Transfer Transfer

Rate Rate

Specifications

Seek

• Seek

Seek

Pulse

Period

Latency

Speed

Overhead

Rate

Buffer

Rate

Buffer

Size

Soft Hard

Start

lime

Stop

lime

Cycles

Idle

Mode

Seek

Mode

to

Disk

to

Host**

Sub-17 6 28

16.67

8.34 3595

0.3

1.2

4.5

1:1

8-Kbyte Static <1 <1 5 15 6 10,000

40 42

Milliseconds

Revolutions/min. Milliseconds MBytes/sec MBytes/second

(32-Kbyte

RAM

1 0

in

10

bits

12

in

10

bits

seconds

dBA dBA

typical

maximum

cycles

at 1 meter at 1 meter

(0.1

%)

(0.1

%)

(0.1

average

optional)

read read

minimum

%)

•

these

**

transfer

• ** tones).

"Average

between

"Data

The

Seek"

all

possible

ordered

Transfer

maximum

of

buffered

pairs.

difference

is

determined

ordered

Rate

from

data

by

pairs

the

Buffer

in

MBytes

between

dividing

of

track

to

the

per

second

adjacent

the

total

time

addresses

Host"

is

based

.

octave

bands

required

by

the

on

is

to

total

the

sustained

12

db

seek

number

(no

pure

of

Western Digital Corporation 5

Caviar ACl40IAC280 Technical Reference Manual

2.2

Physical

Physical Specifications

Recommended Parameters·

Formatted Interface Actuator Number Data Number Number Average Formatted

Capacity Bytes User

Specifications

Setup

Capacity

Type

of

Disks

Surfaces

of

Heads

of

Cylinders

Track

Density

Cylinder

per

Sector

Sectors

per

Drive

Caviar

980 x 10x (CYl x heads x SPT)

85.3 4O-pin Rotary 2 1 4 4 2 1082 1,405 78,848

512 166,628

AC280

17

MBytes

PCI

AT

Voice

TPI

bytes

Coil

Caviar

980x5x17 (CYl x heads x SPT)

42.7 4O-pin

Rotary

2

1082 1,405TPI

39,424

512 83,314

AC140

MBytes

PCI

AT

Voice

bytes

Coil

6

User

Sectors

Cylinder PhySical

Track Servo

Recording Recording Flux Ecc Head

Sectors

Type

Method Density

Density

Park**

per

(4x39)-2=154

39

Embedded Servo

2,7 31,591 21,061 56

bit

Automatic Parking

Sector

Rll

BPI FCI

Head

(2 x 39)

39

Embedded Servo

2,7

31,591

21,061

56

Automatic Parking

Rll

bit

-1 =

BPI FCI

77

Sector

Head

Western Digital Corporation

Do

*

166.628 heads. drive FOUND

**

Seeking

'~

980 cylinders read/write causes

not

exceed

and

parking,

cylinder.s X 10

the

sectors

error

to a cylinder

sectors

spinning

to

x 5

heads x 17 heads Caviar

for

the

maximum

Caviar

per

host.

heads X 17sector.s/track

and

to

perform

AC280) track. down

greater

sectors

spins

down

sector

capacity

when

Exceeding

and

the

disk

than

or

equal

per

track

the

drive.

an

automatic

specifying the

controller

forthe

(83.314

specified

to

cylinder

for

the

Caviar

Turning

head

park

SpecifICations

sectors

the

number

limits

returning

981

(translation

Caviar

AC280,

AC140)

the

system

operation.

for

Caviar

of

resu

the

parks

power

AC140.

cylinders.

Its

in

the

ID

NOT

mode:

or

980

the

off

2.2.1

2.2.2

Physical

Height Length Width

1Ve~t

I

Weight

Dimensions

1.00

(±O.02)

5.75

(±O.02)

4.00(±O.02)lnches

11.12

Pounds ( 508

Inches

grams)

(2.54

±O.05

cm)

(14.60

±O.05

cm)

(10.16±O.05cm)

I

Western Digital Corporation 7

Caviar AC140lAC280 Technical Reference Manual

2.2.3

Mechanical

Figure

2·1

shows

Caviar

intelligent

Specifications

the

mounting

drive.

dimensions

: . '+' •••••••• 0

and

locations

~!.---------------------~ooo--------------------~.;

:

:.

o \:!!I

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of

the

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for

the

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Figure

2-1.

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AC140/AC280

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o

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____

ltoOOOJ.~

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Dimensions

Western Digital Corporation

@_+

__

._

••

.I

SpecifICations

2.3

2.3.1

Electrical

12

VDC and 5 VDC Typical

Operation

Read Write Random

Seek Spin

*Note:

Specificatioll8

Input

Voltage

12VDC

(±5%)

0.350

A

0.350

A

0.375

A

up·

Spin-up normal five

two

1.20A

1.40 A max

mode

spindle seconds. seconds

of

begins Maximum

Current

5VDC

(±5%)

0.220

A

0.220

A

0.220

A

0.200

A

0.25Amax

at

zero

RPM

speed. A complete

spin

up.

spin-up Refer

power

to

Figure

Power

5.30W

5.60W

15.4OW

spindle spin-up

is

2-2

speed

and

operation

dissipated

typically

ends

with

during

requires

the

first

2.3.2

2.3.3

IUpple

Ripple

12VDC 5VDC

Power

Power Mating

Power

Connectors

Connector

Cable

Western Digital Corporation

Connector

Wire

Gauge

Maximum

200 100

and

Cables

mV

(peak-to-peak)

mV

(peak-to-peak)

4-Pin

MOlEX

Body

(AMP

1-480424-0

Pins

(AMP

60619-4

1BAWG

(PIN

15-24-4041

or

Frequency

0-20

MHz

0-20

MHz

or

equivalent)

or

equivalent)

9

Caviar AC140lAC280 Technical Reference "Manual

1.20

1.16

1.08

1.00

A

m

0.80

p

a

0.60

0.40

AC280

10

2.3.4

0.20

0.00

Figure

Grounding

The

mounting

to

the

system

~_-L

2-2.

+12V

screws chassis

__

""

__

1.00 2.00 3.00

nme

In

Current

connect

ground.

Draw

the

head

disk

Therefore.

"&"'

__

aeconda

During

assembly

no

external

'-_--"

Spin

Up

and

grounding

__

(Master

the

printed

strap

-'

Mode)

circuit

is

required.

Western Digital Corporation

board

SpecifICations

2.4

2.4.1

Environmental

Note:

Non-operating

Operation the

Shock

and

Shock

Operating Non-operating

Note:

Half-sine maximum

Vibration

Operating

Non-Operating

Sweep

Rate

Specifications

limits

indicate

at

these

limits

conditions

Vibration

wave

with

specified

of

11

msec

no

non-recoverable

where

is

not

in

the

operating

duration,

device

intended

10Gs 75Gs

two

half-sine

e"ors.

5-17

Hz,

0.034"

17-400

Hz,

5-20

Hz,

0.195"

20-500

Hz,

One-half

damage

and

should

characteristics.

0.75G

4G

octave/minute

be

waves

(double

(Peak)

(double

(Peak)

can

limited

per

amplitude)

occur.

to

second

Western Digital Corporation

11

Caviar AC140lAC280 Technical Reference Manual

2.4.2

2.4.3

Temperature

Operating

Non-Operating

Note:

The

system

casting

Relative Operating

Maximum Non-operating Maximum

temperature

Humidity

Wet

Atmospheric

and

Humidity

environment

at

or

Bulb

Pressure

below

must

55°

allow

C

8%

5%

5°

Ctc

10·

C/hour

-40°

C to

20·

C/hour

sufficient

to

2So

C

to

2SoC

50°

C Therma I Gradient

SO°

C

Thermal

air

flow

80%

RH

non-condensing

95%

RH

non-condensing

Gradient

to

maintain

the

12

Altitude -Operating

Altitude -Non-Operating

-1000

to

10,000

feet

-1000

tc

40,000

feet

Western Digital Corporation

Speci[rcations

2.5

2.6

Agency Approvals

The

Caviar

meets

the

standards

Underwriters

UL-Standard Equipment;

Federal

Verified

15,

Subpart

Canadian

CSA-Standard Equipment;

TUV

Essen IEC Electrical

laboratories

1950,

Standard

File

Number -E101559

Communication

to

comply

Standards

laboratories

950

(EN

Business

with

B,

for

Class B Equipment

Association

C22.2,

File

Number

60

950) Equipment

Commission

FCC

No.

950 -M89

LR

Safety

of

Reliability Specification

of

the

following

for

Safety,

Rules

for

Information

68850

Information

regulatory

Information

Radiated

and

Technology

agencies:

Processing

Conducted

Processing

and

Equipment

and

Business

Emission,

Business

Including

Part

MTBF

MTTR

Component

Warranty

Western Digital Corporation

Design

Period

Life

100,000 10

Minutes

5

Years

Two

Year

Power-on

hours

typical

13

Caviar AC140lAC280 Technical Reference Manual

2.7

Compatibility

The

FIT

lab™ guaranteed complete a two-phase test

which

•

Host

•

Other

•

Operating

•

Application sheets,

vironments)

• In

the

•

Mechanical

•

EMI

•

BIOS

In

addition

and

Phase

compatibility.

includes:

systems

intelligent

desktop

Benchmarks

first

phase

susceptibility

compatibility

to

II:

Per

or

Functional

systems

programs

publishing,

(e.g.,

of

FIT

mounting

these

tests,

Functional

Integrity

Before

any

FIT

process.

drives

(e.g.,

third

the

with

there

Caviar

The

DOS,

Novell,

word

CAD

party

benchmarks

is

third

party

are

Integrity

Testing

drive

is

FIT

process

Xenix,

processing,

and

graphics

such

run

through

and

Western

five

types

of

Testing

lab

ensures

released

results

Unix,

OS/2)

data

base

in

single

as

Core

the

following

Digital

tests

that

the

Caviar

to

the

factory,

in a matrix

management,

and

Test

hardware

are

compatibility

multi-user

and

P.C.

tests:

run

in

both

has

it

must

spread-

en-

Bench)

Phase

I

14

•

Alpha

•

Benchmark

•

Peripheral

•

Host

•

Operating

tests

(Western

tests

compatibility

system

compatibility

Digital

tests

Proprietary

tests

compatibility

test

suite)

Western Digital Corporation

The

selection

have

previously

used

in

•

Extremely

•

Specific

•

Additional

The

five

FIT

include:

types

of

host

systems

presented

fast

units

OEM

systems

host

systems

of

tests

Alpha Tests

The

Alpha

Tests

exercise

in

both

the

physical

and

Benchmark Tests

The

benchmark

Bench

Test

Bench

23

Bench

26

Core

Test MasmTest ASM51 dBase

Test

MS

·C·

Compiler

File

copy Wordstar Wordstar Wordstar lotus

Test

Testdisk

Test

and

compare

Word

Spelling loading

tests

Test

search

test

and

unique

with

that

supplied

that

are

all

of

translation

are

listed

test

saving

is

based

upon

compatibility

very

short

utilize

unique

by

run

in

both

the

read.

modes.

in

the

following

test

market

problems.

timing

windows

operating

OEMs

requesting

Phase I and

write

and

table:

Specifications

representation

Examples

systems

Phase

seek

functions

FIT

II

are

and

described

systems

of

host

of

the

that

systems

below:

firmware

Western Digital Corporation

15

Caviar AC140/AC280 Technical Reference Manual

Peripheral Compatibility Tests

The

peripheral

disk

drives,

compatibility

i.e.,

dual-drive

tests

verify

the

compatibility.

Host Compatibility Tests

The

host

computers.

··copy

and

compatibility

The

compare.

tests

include

verify

the

formatting,

disk's

Operating System Compatibility Tests

The

operating

system

systems

compatibility

including

DOS,

tests

Novell,

Xenix,

drive's

operation

diagnostics,

verify

the

drive's

Unix

and

with

other

with a variety

benchmark

OS/2.

testing

operation

intelligent

of

host

and

file

in

various

16

Western Digital Corporation

Principles

Of

Operation

3.0

3.1

PRINCIPLES

This

viewpoints:

e e_.

Block

A

section

Drive Head

Diagram

block

describes

electronics disk

diagram

OF

OPERATION

the

assembly

of

the

(HDA)

Caviar

principles

is

provided

of

operation

in

Figure

of

the

3-1.

PULSE

Caviar

from

DETECTOR

the

following

Western Digital Corporation

IIICROPROCESSOR

Figure

3-1.

Block

Diagram

17

Caviar AC140/AC280 Technical Reference Manual

3.2

3.2.1

Drive

Electronic8

Caviar's

the

four-layer operations electronic

•

WD42C22

•

BufferRAM

•

WD60C11

•

WD10Cn

•

Microprocessor

•

Pu

lse

•

Spindle

•

Actuator

WD42C22

TheWD42C22 formatter/controller,

manager decodes generator/checker connects

controls

drive

controller.

intelligence

described

components:

Detector

Motor

resides

printed

Driver

circuit

in

Wincl1ester Servo

Controller

Data

Separator ROM

Driver

in

the

board

section

Disk

Controller

and

RAM

specialized assembly.

4.

Winchester Disk Controller

integrates a

into a single,

data

to

and calculates

to

the

host

the

buffer

RAM

CRC/ECC

84-pin

from

system

and

high

generator/checker,

POFP

device.

the

WD10C23

ECC

for

bus

via

handles

the

electronic

These

The

Caviar

performance,

The

controller/formatter

data

the

data

field.

intemal12

arbitration

rnA

components

devices

consists

low

host

separator.

The

drivers.

between

perform

of

the

following

cost

Winchester

interface,

The

host

interface

The

buffer

the

host

interface

mounted

the

intricate

drive

and

buffer

encodes

CRC/ECC

directly

manager

on

and

18

3.2.2

Buffer

A

buffering buffers channels, channels paths.

RAM

8-Kbyte

readlwrite

operate

The

(32-Kbyte

sector

each

address

optional)

data

between

data

having a separate

simultaneously,

access

and

time

static

RAM

the

Caviar

ECC

information.

15-bit

accepting

for

the

buffer

and

address read

buffer

the

AT

The

and

RAM

enhances

system

and write is

120

data

bus.

buffer

is

byte-count

operations

ns

(maximum).

throughput

The

accessed

register.

from

Western Digital Corporation

RAM

by

two

by

only

two

The

data

3.2.3

WD60Cll

The

WD60C11

servo

burst embedded WDSOC11

servo

also

Servo

provides

amplitudes. A servo

provides

Controller

servo

control

implementations,

spindle

discrimination,

motor

track

burst

is a momentary

usually

control.

Principles

address

positioned

capture, servo

between

Of

Operation

and

measures

pattern

sectors.

used

The

in

I

rj

f,

i'

!i

3.2.4

3.2.5

3.2.6

WD

lOC23

The

WD10C23

the

read previously removes WD10C23 WD42C22

Data

handles

channel

the

circuitry

written

noise conditions is

precisely

data,

Microprocessor

A

1S-bit

microprocessor WD42C22. over and

The or

at

Kbytes

controlling resides

Pulse

The preamplifier using compensates input

The

an

internal actuator WD42C22

the

activity

asserts

end

of

optional)

all

in

the

microprocessor's

Detector

pulse

detector

on

level

qualifications

for

level

to

the

microprocessor mu

Itiplexed

either a host

of

external

these

the

variations

pulse

Separator

the

sensitive

at a rate

with

phase,

and

sends

write

data

clocked

ROM

controls

address/data

until

the

interrupt

ROM

functions,

amplifies

flex

circuit.

of

differentiated

in

qualification

read/write

of

12

frequency,

clean

digital

to

be

recorded

to

the

WD10C23.

and

RAM

and

coordinates

receives

WD42C22

when

or

disk

transfer.

and 2 Kbytes

including

external

and

qualifies

Pulse

qualification

head

preamp

circuitry.

signals

megabits-per-second.

and

read

and

sends

bus.

The

asserts

the

host

The

the

32-Kbyte

the

input

output

between

write

splice

noise.

signals

on

the

microprocessor

the

writes

microprocessor

of

external

adaptive

ROM.

RLL-encoded

zero

to

the

drive.

Data

activity

command

microprocessor's

in

read

crossings.

levels,

of

or

to

the static

multi-segmented

mode presenting a constant

Read

Command

the

WD42C22

data

refers

The

WDl

WD42C22.

to

and

from

the

HDA

and

status

information

monitors

uses 8 Kbytes

RAM.

signals

is

An

spindle

interrupt

Register

Firmware

cache,

from

accomplished

AGC

amplifier

and

to

OC23

The

the

line.

(32

the

In

write

mode, switches a

write-to-read

to

Western Digital Corporation

the

a

lower

transition.

circuitry

level

to

is

allow

disabled.

fast

settling

The

of

AGC

the

input

gain

stage

coupling

input

impedance

capacitors

during

19

Caviar

AC140lAC280 Technical Reference

Manual

3.2.7

3.2.8

Spindle

The

three-phase

The

driver

Actuator

The

actuator

of

the

voice

H-bridge

driver,

Motor

is

coil

Driver

spindle

controlled

Driver

driver

motor.-A digital-to-analog

which

motor

by

the

provides

uses + l2V,

WD60C11

precision

driver

+5V

can

supply

Servo

Controller.

placement

converter

and

ground.

up

of

to

the

in

1.4A

to

the

read/write

the

WD60C11

spindle

heads

controls

motor.

by

means

this

20

Western Digital Corporation

Principles

Of

Operation

Western Digital Corporation

Figure

3-2.

Mechanical

Exploded

View

21

Caviar

AC140lAC280 Technical Re(erence

Manual

3.3

3.3.1

Head

Disk Assembly (HDA)

The

functional

sealed

cover. spindle. housing. A clean

The

•

headstack.

HDA

tonsists

Base/Cover Spindle Disk Headstack Voice

Air

Motor

Stack

Coil

Filtration

Base/Cover Assembly

The

single-piece assembly. spindle HDA, a tape

The

motor.

seal

parts

of

the

The

assembly

and

environment

of

the

following

Assembly

Assembly Assembly

Assembly

System

cast

base

base/cover

voice

coil.

is

wrapped

HDA

are

mounted

provides

voice

provides a mounting

assembly

and

pivot.

around

exact

coil

through

is

also

maintained

mechanical

has

To

ensure a Class

the

base

to a common

mechanical

precise

within

subassemblies:

platform

machined

and

cover

die-cast

relationships

machined

the

for

mounting

100

environment

castings.

housing

dimensions

HDA

enclosure.

the

components

surfaces

with

between

on

of

the

for

the

within

the

a the the

22

3.3.2

Spindle Motor

The

spindle bearing spindle casting.

Proprietary monitoring sensing. lowers dynamically

motor

assembly.

motor

assembly

The

motor

spindle

the

spindle

instead

the

of

power

brake

assembly

disk

rotates

electronics

the

consumption

the

spindle

consists

mounting

is

completely

the

spindle

motor's

conventional

during

of a brush

hub.

and a ferrofluid

enclosed

shaft

sense

motor

back

electromotive

Hall

effect

and

increases

motor

less

at

3595

or

spin

three-phase

magnetic

in

the

HDA

RPM.

speed

and

force

inductive

reliability.

down.

and

(BEMF).

motor

motor.

seal.

bolted

angular

position

Motor

driver

spindle

The

entire

to

the

position

Using

BEMF

sensors.

circuits

base

Western Digital Corporation

by

3.3.3

Disk

Stack

The

disk

stack

Caviar

AC2BO,

place.

The

platters

plated

with a layer of-carbon the

read/Write

the

read/write

Assembly

assembly

two

Caviar

AC140

of

the

overcoat

heads.

heads

consists

disks

and has

Caviar

drives

of

nickel,

protects

The

final

and

media

of

one

spacer

one

disk

are

followed

the

magnetic lubricant

during

disks,

disk

spacers,

are

placed

and a spacer.

thin

inflexible

by

the

magnetic

material

layer

provides

take-offs

Principles

and a disk

on

the

aluminum

media

against

and

wear

further

landings.

Of

Operation

clamp.

hub

and

clamped

disks.

Each

coating. A thin

and

abrasion

protection

In

the

into

disk

is

film

from

between

I

il

i,J

Ii

3.3.4

Headstack

The

headstack

•

Read/Write

•

Actuator

•

Flex

Assembly

assembly

Heads

Arm

Circuit

ReadIWrite Heads

The

metal-in-gap assembly sputtered magnetic a

small

read/write

the flexure,

balanced

mounted

metal

flux

block

head.

head. A linkage

connects

about

Actuator

The

actuator

servo-controlled embedded

in

(MIG)

in

the

reversals

of

ceramic

The

the

Arm

Assembly

arm

and

all

disk

on a Whitney

pivot

assembly

tracks.

consists

read/write

head

gap.

than

normal

material.

read/write

between

slider

to

the

center.

is

derives

position

of

the

heads

class

The

metal

composite Bonded head

the

actuator

illustrated

following

suspension

into

induces

information

mechanical

consist

in

the

heads.

the

outer

voltages

block

arm.

in

Figure

gap

The

subassemblies:

of a mini-composite

system.

allows

The

and

Caviar

from

rail

the

3-2.

MIG

heads

greater

mini-composite

of

in a coil

read/write

actuator

the

mini-slider

mounted

This sector

sensitivity

assembly

slider

is

above

heads,

is

statically

servo

have

to

is

the the

is

data

Flex Circuit

The

head

conductors

the

HDA.

The

and

the

voice

maximizes

Western Digital Corporation

flex

coil

the

read/write

are

flex

circuit

assembly

actuator

cables

routed

through

transfers

motor. A preamplifier

heads'

signal

signals

strength

the

between

IC,

while

flex

circuit

the

read/write

located

minimizing

on

assembly

the

flex

circuit,

noise.

inside

heads

23

Caviar AC140lAC280 Technical Reference Manual

3.3.5

3.3.6

Voice CoB Assembly

The

voice

coil

assembly

coil, a bidirectional The

pivot

assembly

Air

FBtration

It

is

absolutely HDAis To the any Mounting the an filter, the of

assembled

retain

recirculating

particulates

air

flow.

air

pump

cleans

internal

the

HDA.

essential

this

clean

the

recirculating

This

forcing

any

and

external

consists

crash

stop,

fits

in

System

that in a Class environment,

filter,

cleans

which

may

strategic

air

through

external

air

of

an

and a pivot

the

actuator

air

Circulating

100

purified

the

air

be

generated

filter

the

recirculating

air

entering

pressure.

upper

bearing.

block

air

Caviar

within

to

the

of

the

HDA.

The

and

lower

bore.

within

the

environment,

is

equipped

the

HDA.

The

during

head

disk

places

filter

allows

filter. A second

The

breather

filter

magnet

drive

be

then

with

two

recirculating

landings

the

filter

the

rotating

filter

is

located

plate, a flat

particle

sealed

filters.

in

filter,

with filter

or

the

direction

disks

the

also

on

the

free. One take-ofts.

to

breather

equalizes

rotary

The tape. filter, traps

of

act

as

bottom

24

Western Digital Corporation

Advanced Product Features

4.0

4.1

ADVANCED PRODUCT FEATURES

CacheFlow

4.1.1

Western capacities product

features:

•

CacheFlow

Purpose

Cache and not

the

partitions

selects

Digital's

for

the

features.

CacheFiow Defect

Management

Error

Recovery

Translation Dual

Drive

is

the

of

Flow

was

the

overhead

only

the

size

application

the

Caviar's

the

appropriate

Caviar

series

IBM

PCI

AT

This

section

and

Process

Option

industry's

first

CacheFiow

designed

due

of

is

sequential.

to

rotational

the

data

8-Kbyte

caching

by

request

of

intelligent

and

compatibles

describes

Format

Characteristics

adaptive,

Western

latency

but

random

(32-Kbyte

mode

for

drives

provides a choice

with a full

the

following

multi-segmented

Digital

to

minimize

delays.

the

or

repetitive. optional) optimum

CacheFlow

type

of

RAM

system

complement Caviar

disk

data

request,

Cache

Flow

buffer

performance.

of

data of

advanced

caching

seeking

constantly

into

operations

that

is,

then

dynamically

segments

storage

advanced

product

system.

evaluates

whether

and

4.1.2

Benefits

In a typical

adaptive

by

Applications request performance

design

immediately

the

Western Digital Corporation

of

CacheFiow

application,

enables

implementing

such

as

"Core

same

data

edge

by

switching

most

the

Caviarto

Test"

over

host

requests

eliminate

the

Sequential

or

other

and

over

to

the

are

for

unnecessary

mode

benchmark

again.

Repetitive

sequential

disk

once

the

data

utilities,

CacheFlow

mode

of

operation.

data.

CacheFlow's

seeking

has on provides a similar

operations

been

the

other

analyzed.

hand,

25

Caviar ACl40IAC280 Technical Reference Manual

4.1.3

CacheFiow

Sequential partitions

As

seeking

sector

count

hit

score

performance. CacheFlow

operations host-requested buffers,

CacheFlow operation Only

the

Operation

mode

the

8-Kbyte

operations

parameters

algorithm

switches

if

the

data

cache

transfers

does

not

sectors

is

the

to

same

hit

affect

that

default

(32-Kbyte

begin,

as

illustrated

either

increase

from

Sequential

block

is

has

been

score

can

host

write

the

buffer's

are

rewritten

mode

of

operation

optional)

CacheFlow

accessed

read. be

data

cache

monitors

in

Figure

or

decrease

mode

twice.

By

storing

significantly

immediately

cache

are

purged

for

Cache

buffer

the

4-1.

CacheFlow the

to

Repetitive

Both

read-ahead

improved.

to

segments

from

since

the

Flow.

into

four

data's

segment

modes

the

sector

write

buffer.

The

Caviar

caching

sector

then

mode

read

data

segments.

address

uses a simple

size

for

during

ahead

in

the

buffer. A write

is

not

initially

and

optimal

read

after

the

sector

cached.

26

Western Digital Corporation

Sequential

Mode

Selected

(Default

Host-Requested

"

Read Data

Mode)

,

Monitor

Address

Sector

and

Sector Count

Parameters

1

Hit

Score

Algorithm

Advanced Product Features

Read

Ahead

and

Partition

New

Segments Empties Buffers

I+-

Host

Reads

Data and

Western Digital Corporation

:+-

Figure

4-1.

I

Sequential

Mode

Selected

Cache

Flow

as

Accessed

Twice?

Repetitive

Selected

Algorithm

Same

Blocks

CD

Mode

1-+

Read

Ahead

and Partition

New

Segments

f

Host

Reads

Data

and

Data Retained

27

Caviar AC140lAC280 Technical Reference

Manual

4.1.4

4.1.5

Sequential

The

sequential

the

host-requested

until

the

cache

beginning

Based

on

the

hit

to

optimize

The

larger not

effectiveness

default

number

store

enough

segment

mode

for

Repetitive

The

Repetitive accessed and maximum the

twice,

can

override

hit

score.

host-requested

Mode

caching

data

is

full.

After

is

established

score

performance.

of

four

of

segments

sequential

random

Mode

caching

the

Repetitive

the

Unlike

data

mode

is

the

into

the

host following

algorithm,

cache

segments

may

limit

sectors. A smaller

reads.

mode

resembles a static

mode

number

of

Sequential

remain

valid

standard

segment(s),

reads

sequential

cache

is

segments

read-ahead

the

requested

the

last mode

provides

effectiveness

selected.

to

Mode,

however,

after

the

cache.

CacheFlow

sector

Repetitive

build

hosts

continues

data

buffer

adapts

optimum

because

number

buffer.

one

the

sector

reads

After

from

returned

the

number

cache

of

segments

If

the

mode

large

segment

buffers

the

data.

reading

to

the

cache, a new

performance.

the

segment

same also

all

read

ahead

to

the

host.

of

segments

may

limit

blocks

reads

ahead

with

containing

of

A

may

are the

28

Western Digital Corporation

Advanced Product Features

4.2

4.2.1

4.2.2

Defect

Management

Defect

Every

Caviar

any

defective

Following

-··sector;,cylinder. map

is

to

assigned. Western

any

additional

Format

The

Caviar mapped installation.

format

must

In

order programs. command. host's

interleave

does

not

Management

undergoes

sectors

the

manage

Digital

information.

Characteristic8

is

shipped

out.

No

still

to

be

compatible

the

corrupt

on

extensive

and

head·numbers

the

reallocation

offers a defect

defects

This

Caviar

that

from

eliminates additional be

performed.

supports

performs a logical

table

request

the

defect

and

Format

factory-level

the

media

tests. a primary

may

the

low-level

with

log

management

intelligent

before

for,all

of

spare

management

occur

after

factory

preformatted

the

need

formatting

existing.

for

industry

ica I format.

good

and

Characteristic8

burn

in.

which

the

drive

leaves

defect

list

is

created.

defects.

for

version

that

The

sectors

bad

and

utility

called

prolonged

(low

the

end-user is

required.

standard

When

the

of

this

sector

has

been

purpose tracks

use.

defect

host

command

marking.

applied

thoroughly

the

manufacturing

The

list

contains

of

the

sector

after

they

have

WDAT_IDE.

Refer

level)

with

to

enter

although a high-level

management

issues

(The

to

section 8 for

all

the

defects

the

Format

in

response

logical

the

drive.)

tests

for

facility.

the

/track

been

manage

defects

during

utility

Track

to

the

format

If

the

host

data

fields interleave must

contain

interleave

to

"OOH"

to

byte

designates

Western Digital Corporation

issues

the

Format

of

the

specified

table

identifies

512

bytes

of

table.

The

first

indicate a good

the

logical

Track

track

any data. byte

sector

command

are

bad

sectors

There

marks

or 10

filled

with a data on a given

are

two

the

sector

to

"SOH"

number.

during

normal

pattern

track.

bytes

per

sector

as

good

or

to

indicate a bad

operating

of

The

for

bad.

The

sector.

modes.

all

zeroes.

interleave

each

entry

first

byte

The

the

The

table

in

the

is

set

second

29

Caviar AC140lAC280 Technical Reference Manual

4.3

Error

The

•

The

•

The commands. operations Caviar the

The succeed continues validate Caviar's

Recovery

Caviar

has

Read/Write

Extended

Caviar's

10 Data Error

host

appropriate

Read/Write

retry

Not

Found

Address

Correction

may

are

will

not

in

reading

executing

the

Error

two

means

Retry

Read

Retry

procedures

(ION

Mark

Code

explicitly

All

other

always

perform

bit

in

Retl'(

or

10

fields

Register

of

error

recovery:

Procedure

are

implemented

F)

Not

Found

(DAMNF)

(ECC)

enable/disable

commands

performed

any

the

Error

Procedure

writing a specified

the

command.

on a specified

and

disk

controller

Register.

the

command

and

the

with

retries

will

perform

For a write

track,

for

retries

in

controller's

enabled.

retl'(

operations

up

sector.

then

is

terminated.

the

following

the

Read,

internal

If

retries

and

to

ten

basic

If

recovery

operation,

an

IDNF

errors:

Write

disk

are

will

retry

is

achieved,

if

these

error

is

and

Read

Verify

read

and

write

disabled,

immediately

operations retries

reported

the

Caviar fail

to

the

set

to to

30

For a read recover combinations recover

the

offset reports In

the consecutive spans register, not (uncorrectable)

the

read

retry

operation

before

the

case

eleven

and

found,

operation,

data.

of

data.

continuing

appropriate

of

an

matching

bits the

or

if

the

error

the

Caviar

The

Extended

early/late

This

procedure

is

successful.

with

error

ECC

error,

syndromes.

or

less,

the

command

error

to

the

continues.

spans

Error

will

Read

window

is

the

command.

to

the

Error

the

drive

If

data

is

corrected,

more

Register.

perform

shifts

Caviar

matching

Ret!'(

and

used

for

clears

Register,

performs

If

two

than

eleven

the

If

Extended

Procedure

positive/negative

the

IDNF,

any

the

retry

with

up

syndromes

the

CORR

consecutive

DAMNF

existing

operation

the

to

eight

bit

bits,

the

Read

Retry

employs

track

and

window

failed,

exception

are

is

matching

retries

found,

set

in

the

Caviar

of

reports

Procedure

up

to

sixteen

offsets

ECC

errors.

shift

or

track

the

Caviar

an

ECC

error.

to

obtain

two

and

the

error

host's

status

syndromes

an

are

ECC

to to

If

Western Digital Corporation

Advanced

Product

Features

4.4

Tr8118lation

The

Caviar

translated

command

the

cylinder, maximum per

'drive

respectively.

The

minimum

any

translation

Sectors/track

Heads Cylinders/drive

The

values

pertrack

will setup

(SPTI.

always

parameters.

implements

drive

configuration

to

issue

head,

and

number

for

the"

Each

value

parameter

in

the

Sector

and

be

in

the

of

Caviar

sector

for

heads.

linear

and

sector/track

sectors

available

AC140

consists

any

translation

is

as

63

16

1024

Count

Register

Regardless

translation

address

are

selected

counts to

andAC280

of

512

parameter

follows:

and

of

mode.

translation.

by

using

counts

to

must

the

user.

The

are

bytes.

the

SOH

the

values

Refer

to

section

The

the

translator.

be

equal

maximum

B3,314

is

one.

Register

of

the

SPT

2.2

translation

Set

to

-and·166;"62B

The

maximum

determine

and

for

the

mode

Drive

Parameters

The

product

or

less

than

number

of

value

the

heads,

recommended

and

of

the

sectors

sectors,

for

sectors

Caviar

4.5

Dual

Drive

The

Caviar

master

or

slave

for

both

master means section

The Signal

the and and configured, when

of

6.

SOH

Register

is a time-multiplexed

I/O

interface. master

drive

diagnostics,

released

the

slave

Western Digital Corporation

Option

supports

drive

and

slave

a

daisy-chain

contains

At

reset,

drive,

showing

upon

completion

the

Caviar

bit

is

dual

drive

operations

designation. A jumper

configurations.

cable

assembly.

the

master/slave

indicator

this

signal

that a slave

OASP

is

asserted

of

will

not

respond

selected

in

the

Connection

of

"drive

is

an

output

drive

at

command.

to

commands

SOH

Register.

by

means

must

be

These

configurations

select

active

from

is

present.

the

beginning

If

the

-

of

configuration

placed

in

to

the

bit

for

or

slave

the

slave

For

all

of

master

or

drive

the

drive's

host

is

implemented

are

the

Caviar.

present"

drive,

and

times

other command drive

option

status

on

options option

described

The

on

the

Caviar's

an

input

than

processing

has

the

interface

for

area

by

in

OASP

to

reset been

31

Caviar AC140lAC280 Technical Reference Manual

32 Western Digital Corporation

Host Interface

and

AT

Command

Set

5.0

5.1

HOST INTERFACE AND

This

•

J2 PIN

The

in

Figure

corresponding

section

J2

Caviar

.£aviar

Host Host Error

Caviar

I

describes:

assignments

registers

mmmands interface interface

read write

timing

reporting

ASSIGNMENTS

interfaces 5-1.

39

••••••••••••••••••••

••••••••••

Table

signal

with

the

5-1

identifies

names

J2

0

•••••••••

host

and

110

the

signal

AT

COMMAND

bus

via

the

4O-pin

numbers

functions.

J8

1

531

0

··~I

0

•••

SET

connector

of

the

4 3 2 1

J2

connector

J3

(J2)

illustrated

.....

and

the

40 2

C

ErnpIV

J2

Row

of

Western Digital Corporation

box.

20

k~ed

pins

represent

removed

Figure

removed

III

separate

5-1.

pins.

J2

from

J8

Standard

642

Factory

Connectors

L+12V

GN)

+5V

33

Caviar ACl40IAC280 Technical Reference Manual

Pin Number

1

3,5.7,9, 11,13,15, 17

4,6,8,10,12, 14,16,18

2,19,22, 24,26,30,40

20 21,27,

28,29 23

Mnemonic

RST

HD7-O

HD8-15

GND

lOW

Signal

Reset

Host Bus

Host Bits

Ground

i7QWrite

Name

Data

Bits

Data

8-15

7-0

Bus

-

Function

VO

I

Initializes

asserted. The

I/O

bidirectional transferring

information

and

I

The during (16-bit

Key -Not Reserved -Not

connected

I

The lOW byte

the

Caviar

tristate,

the upper

host

when a data is

8-bit.

bus

status

between

Caviar.

data

transfer

data

transfer).

connected.

controller

written

to

for

and

bus

asserts

or

the

when

control

the

host

is

used

only

control

Caviar.

25

31

32

lOR

INTRQ

I/OCS16

Table

5-1.

I/O

Interrupt

1[0

Select

J2

Read

Channel

Reques1

16

Descriptions

lOR byte

The

0

request the

Identifies

0

from

controller

when a data

is

read

Caviar

asserts

interrupt

host.

data

the

host

or

from

the

service

transfers

as

16

asserts

status

Caviar.

INTRQ

to

from

to

bits

wide.

or

I

The

host

34 Western Digital Corporation

Host Interface

and

AT

Command

Set

Pin Number

35,33,36

34

37

38

39

Mnemonic

HAO-2

PDIAG

HCSO

HCS1

DASP

Signal

Name

Host

Address

Bus Passed

Diagnostics

Host

Chip

Select

0

Host

Chip

Select

1

Drive Active/Slave Present

Function

VO

I

AO,

A1

ports 0 through Output

I/O

it

has

Input

I

The

host address with channel.

I

The

host address with registers.

This

I/O

open time indicating present. an

output

and

an drive, drive other diagnostics, asserted slave execution.

and

A2

address

7.

from

slave

passed

to

the

multiplexed

showing is than

drives

its

master

drive.

asserts

and

communicate

Caviar

on

asserts

and

communicate

Caviar

auxilliary

collector

drive

active

At

reset,

from

the

input

to

the

that a slave

present.

reset a nd

DASP

by

the

master

during

For

diagnostics.

CSO

CS1

I/O

drive

when

to

the

I/O

to

output

Signal

or

slave

this

signal

slave

drive

master

all

times

drive

should

and

command

is

be

a

is

Table

Western Digital Corporation

5-1.

J2

Descriptions

(cant.)

35

Caviar AC140lAC280 Technical Reference Manual

Pin Number

3-18 35

33 36

23 25 31

32

34

37 38

39

Mnemonic

DO -D16 SAO

SA1 SA2

lOW

iDA

HINTRQ

IOCS16

PDIAG

CSO

CS1 HACT

Signal

Host Host

AO,

I/O I/O Interrupt

Request I/O

Select Passed

card

Host

Name

Data Addr

A1

and

Write Read

Channel

16

Diag

Selects

Active

Bus Bus

A2

Circuit

BidirectionalInput -Circuit

Input -Circuit Input Output -Circuit

Output -Circuit

Output -Circuit Open

Input -Circuit

Output -Circuit Open

Definition

B

Circuit

B

collector

B

collector

Circuit

Code

A

36

Table

5-2.

AT

Host

Electrical

Characteristics

Western Digital Corporation

Host Interface

and

AT

Command

Set

Symbol

loh

101

Vih

Vii

Voh

Vol

Iii

Table

Parameter

High

level

Output

Current

low

level

Output

Current

High

level

.

Input-Voltage low

level

Input

Voltage

High

level

Input

Voltage

low

level

Input

Voltage

Input

leakage

5-3.

Data

Min

Type

Max

-5

12

2 V

0.8

2.4

0.4

±10

Bus

SOO-16,

INmO,

and

Units

rnA

V

uA

I/OCS

Test

2.4

0.4

VCC=MIN Vih=Vih Vil=Vil

101= VCC

16;

Circuit

volts

12

=0

min

max

min

max

rnA

to

VCC

A

Western Digital Corporation

37

Caviar AC140lAC280 Technical Reference· Manual

Symbol

Vt+

Vt-

Vik

···Voltage

Ii

Vol

Iii

Parameter

High

Level

Threshold Low

Level

Threshold Input

Clamp

Hysteresis

Input

Current

MAX

Input

Voltage

High

Level

Input

Voltage

Low

Level

Input

Current

Table

5-4.

Min

1.5

0.6 0.9

0.4

Schmitt

ffigger

Type

1.7

0.8

Inputs

Max

2.0

1.1

-0.5

1

10

20

lOR,

Units

V

uA

lOW,·

Test

VCC=TYP

VCC=

VCC=MIN

VCC=MIN (VT

VCC=MAX

VCC=MIAX Vih=2.7V

VCC=MAX Vil=0.4V

Circuit

TYP

+-VT-)

8

38

Western

Digital Corporation

Host

Inteiface

and

AT

Command

Set

5.2

5.2.1

Host

Interface

Register

The

task

file registers Caviar. bits When Alternate

All

wide.

the

pass

drive

Status

CSD

0 0 0

0

Registers

Address

occupies

command,

registers

,,·These

registers

is

busy,

Register

CS1

1 1 1

1

Map

the

are

only

address

status,

eight

are the

is

always

HA2

space

and

bits

wide, accessed Status

accessible

HA1

0 0 0 0 0 0

0

shown

data

information

except

for

via

control

Register

is

with

HAD

1

1 1

0

in

Table

5-5.

The

between

the

Data

lines

accessible

CS1

active.

Read Function Function

Data Error Sector Sector

Count Count Sector

Number

the

Register

HAO-2,CSO,

with

CSO

Registers

task

file's

host

and

which

and

active.

Write

Data

Sector Number

ten the

is

16

CS1.

The

0

0 0 1

1

Western Digital Corporation

1 1

1

1 1 1 1

0

Table

1 1

1 1 1

5-5.

Task

0 0

0

File

Map

Cylinder Cylinder Low

Cylinder

1

High High SOH

0

Status Ait

0

Status

Oigitallnput

Low Cylinder

SOH Command Fixed

Disk

Control

39

Caviar AC140lAC280 Technical Reference Manual

5.2.2

5.2.3

Data

Register

The

Data

Register

write

commands.

ECC

bytes

transferred

wide.

Error

The Not

The The The cases Register's

01 = No 02 = Not 03 = Buffer 04 = WD42C22 05 = Microprocessor

ax

Register

Error used.

Error register only

exceptions

the

error

=

Slave

Register

Error

error

applicable

drive

holds

All

data

contains

contains a valid

are

Register

bit.

These

RAM

error

register

internal

failed

the

data

transfers

during

read

an

error

an

error

error power-up contents

two

exceptions

error

RAM

to

be

are

long

code

code code and

are

error

valid

issuance

transferred

high

or

write

that

only

regardless cause

or

ROM

to

speed

and

long

indicates a particular

if

the

Status

of

a

diagnostic

the

following

checksum

or

from

the

16

bits

wide,

commands

Register

command.

of

the

condition

error

host

on

except

which

type

error

of

values:

read

for

are B bits

of

failure.

of

failure.

bit 0 is

In

these

the

Status

and

the

set.

40

If

a

slave

drive's

the

SDH

when

drive

is

status

bits.

Register.

asserted:

present

To

read

In

all

other

and

the

has

failed

slave's

cases

its

error

the

Error

diagnostic,

code,

SOH

the

host

Register

is

should

bits

ORed

are

defined

with

select

the

master

the D bit

as

follows

Western Digital Corporation

in

Host Interface

Bit

Positions

andAT

Command Set

7

BBD

BBD ECC

IDNF AC TKO DAMNF

Error

Register

If

bit 7 is

asserted.

ID

field

while

Error

Register

If

bit 6 is

while

reading a target

6 5

ECC

Bad Error

ID Aborted Track 0 (unable Data

Bit 7 (BBD)

it

indicates

attempting a read

Bit 6 (ECC)

asserted.

it

indicates

0

Block

Correction

Not

Found

Address

sector.

4

IDNF

Detected

Code

(target

Command

to

find a valid

Mark

that

the

Caviar

or

write.

that

the

Caviar

3

0

(uncorrectable

sector

Not

Found

detected a bad

detected

AC

could

track

an

2 1

TKO

error

detected)

not

be

found)

0)

block

mark

uncorrectable

0

DAMNF

in a sector

data

error

Error

Register

Not

used.

Error

Register

If

bit 4 is

asserted.

for

the

specified

Error

Register

Not

used.

Western Digital Corporation

Bit

5

Bit 4 (lDNF)

it

indicates

logical

address.

Bit

3

that

the

Caviar

was

unable

to

locate a valid

ID

field

41

Caviar ACl40IAC280 Technical Reference Manual

Error

Register

If

bit 2 is

This

is

•

Illegal

•

No

•

Drive

•

Invalid

Error

Register

If

bit 1 is

indication. Error

Register

If

bit 0 is

Address

Bit 2 (AC)

asserted,

due

to

one

write

seek

complete

not

ready

command

Bit 1 (TKO)

asserted,

This

Bit 0 (DAMNF)

asserted,

Mark

(DAM)

it

indicates

of

the

following:

current

bit

condition

code

it

indicates

is

only

it

indicates

within a given

that

the

Caviar

(write

that

the

Caviar

valid

after a Recalibrate

that

the

number

fault)

Caviar

has

terminated

was

of

byte

the

unable

to

locate a valid

command.

unable

to

times

after

current

command.

track

locate a valid

the

10

field.

0

Data

5.2.4

5.2.5

Write

The the contents

Sector

The a

During a format (SPT) command. any,

Register Read

Write

Format

Read Set

Read Write

Set

Precompensation

Write

Precompensation

Caviar

automatically

of

this

Count

Sector

Count

read,

write

or

and

must

When

that

were

not

contents

Sector

Track

Verify

Drive

Parameters

Multiple

determines

register

verify

correspond

are

Register

operation,

read

are

indicates

operation.

by

the

or

written

used

by

with

Register

only

used

the

(A

value

this

register

the

host,

this

during

the

following

is

ignored

the

by

the

number

of

contains

values

register

the

during

normal

proper

write

Set

Buffer

Mode

of

sectors

zero

indicates a count

the

number

indicated

by

indicates

command.

write

operations

precompensation.

command.

to

be

transferred

of

256

sectors.)

of

the

sectors

Set

Drive

number

The

per

Parameters

of

sectors,

Sector

since

The

during

track

if

Count

42

Western Digital Corporation

Host Interface

and

AT

Command

Set

5.2.6

5.2.7

Sector

The written

commands: Read

Write Read Read

Write

Number

Sector

to

Sector

Sector Verify Multiple

Multiple

Number

by

the

host.

Register

The

defines

contents

the

target of

this

sector

register

Cylinder Low/Cylinder High Registers

The

Cylinder

commands

register document. starting

bits

of

7

LSB

low/Cylinder

that

for

extended

The

cylinder

the

starting

require

commands.

Cylinder

number.

cylinder

6 5

lSB

High

an

address. low

The

number.

LSB

Registers

These

Extended

Register

Cylinder

Bit

Position

4

lSB

contain

registers

commands

contains

High

Register

3

LSB

0 0 0 0 0

for

the

are

the

logical

also

selVe

are

the

eight

contains

2 1

lSB lSB

MSB

current

used

by

cylinder

as a 16-bit

beyond

low-order

the

MSB

operation

the

following

addresses

command

the

scope

bits

three

high-order

MSB

when

of

0

lSB

for

this

the

The

contents

commands: Seek

Read

Sector

Write

Sector

Format

Track

Read

Verify

Read

Multiple

Write

Multiple

Western Digital Corporation

of

the

Cylinder

low/Cylinder

High

Registers

are

used

by

the

following

43

Caviar AC140lAC280 Technical Reference Manual

5.2.8

SDH Register

The

SOH

Register

bit

assignments

7 6

1

SS1 -SSO = Sector

o =

Drive

HS3 -HSO = Logical

SS1

and

SSO

sector

size

When

the 0 bit

logical

commands:

Recalibrate

Seek

Read Write Format Read

Set

head

Sector

Track

Verify

Drive

are

SS1

Select

(sector

at

512

is

number.

Parameters

selects

the

drive

as

follows:

5

··SSO

Size

(512

Bit

Head

Select

size

bits)

are

bytes/sector.

reset,

the

master

The

contents

and

head

Bit

Positions

4

0

byte) = 01

Bits

set

to 0

When

the 0 bit

drive

of

number

°HS3

and

is

selected.

this

for a particular

3 2 1

HS2

1,

respectively.

is

set,

the

HS3 -HSO

register

Read

Multiple

Write

Multiple

Set

Multiple

Read

Buffer

Write

Buffer Identify Set

Buffer

are

Drive

This

slave

specify

used

Mode

operation.

HS1

setting

drive

is

selected.

the

by

the

following

The

0

HSO

fixes

the

desired

44

Western Digital Corporation

Host Interface

and

AT

Command Set

5.2.9

Statu8

The Status

Register

Status

Register

7

'BSY

BSY ROY WF

SC ORQ CORR

lOX

ERR

Status

Bit 7 (BSY)

This

bit

reflects

and

it

is

deactivated

task

file

register

receiving

Register

resets

6

ROY

the

contents

contains

any

pending

5

'WF

Busy, Ready,

Write

requested

Seek

Data

Request

Data

Was Index, Unrecoverable

state

of

the

at

command

other

than

of

the

drive's

interrupt.

Bit

4

SC

indicates

Fault,

Complete

index

the

Status

state

indicates

command

Corrected

pulse

error

controller.

completion.

Status

Register.

status

following a command.

These

Position

3

--ORO

of

controller

state

of

target

hazardous

of

target

It

is

activated

An

Register

are

CORR

drive

attempt

while

Reading

the

bit

assignments:

by

= 1

1

'lOX

and

the

host

results

aborts

2

condition

with a command

BSY

ERR

request,

to

read

in

the

0

the

any

host

Status

Bit 6 (ROY)

This

bit

reflects

o

is

not

honored.

the

command

Status

Bit

This

bit

indicates

of

a

write

fault

command Status

Bit 4 (SC)

When

set,

Western Digital Corporation

the

If

is

aborted.

5

(WF)

the

condition

requests

this

bit

indicates

state

of

the

a

command

occurrence

causes

are

not

honored

the

target

drive.

request

of

a

write

the

current

until

last

requested

Arf.t

is

executed

fault

command

the

condition

seek

command

and,

if

at

the

target

request

clears.

has

been

requested ROY

becomes

drive.

The

to

abort.

completed.

while

ROY

=

inactive,

presence

Subsequent

45

Caviar AC140lAC280 Technical Reference Manual

Status

Bit 3 (ORO)

This

bit

is

high

when

data

is

to

be

transmitted

Status

Bit 2 (CORR)

When

this

bit

is

set,

it

a

correctable

Status

Bit 1 (lOX)

This

bit

reflects

Status

Bit 0 (ERR)

When

this

may

ascertain

bit

error

the

is

set,

the

indicates

in

the

target

it

indicates

type

of

data

field

drive's

error

that

which

index

that

by

reading

one

or

was

pulse.

an

unrecoverable

5.2.10

The

host

requests a controller/drive Command section

Register.

5.3

The

write

for a description

of

function

action

sets

all

commands

between

more

of

corrected

the

Error

by

the

BSY

supported

the

host

and

target

the

sectors

error

Register.

writing a function

bit

in

via

the

by

sent

the

has

occurred.

Status

the

Caviar.

to

ECC

algorithm.

Register.

controller.

the

host

The

code

in

had

host

the

See

5.2.11

5.2.12

Alternate

The

Alternate

pending

Fixed

The

Fixed

provides

StatUI

Status

interrupt)

Disk

Control

Disk

Control

the

ability

Register

as

the

Register

to

enable

provides

Status

Register

or

disable

allows

Bit

7

6 5

0 0 0 0 0

The

software-controlled

as

long

as

it

is

microseconds,

then

active

off,

reset

(high).

to

complete

bit

This

(RST)

the

same

information

at a different

for a programmable

control

of

the

Position

4

bit

the

3

maintains

must

be

reset

function.

the

turned

address.

fixed

disk

2

RST

fixed

disk

on

for a minimum

(without

controller

in a reset

resetting

priority

1

IDS

reset

and

interrupt.

0 0

condition

of

5.0

a

46

Western Digital Corporation

In

dual

drive

signal

and

asserts completing for

the

slave

The

interrupt controller Disabling interrupts

interrupts.

interrupts

are

configurations,

PDlAG

its

reset

drive

to

disable

also

re~nabled.

the

after

routines

assert

POIAG.

control Disabling

tristates

Interrupts

slave

completing

and

bit

Host Interface

drive

negates

its

reset

routines.

before

(IDS)

an

interrupt

the

INTRO are

negating

is

used

disabled

BSY.

to

does

line. A pending

following a system

and

AT

POIAG

upon

The

wa.its

up

disable

not

(high)

clear a pending

interrupt

Commnnd Set

receiving

master

to 3 milliseconds

the

drive,

or

enable

interrupt.

executes

master

reset

after

(low)

once

reset.

5.2.13

D~bdInputRegm~r

The

Digital

Input

fixed

disk

on

the

adapter

7

DCG

DCG WfG HS3,I:!&

HS1,

HSO

DS2,DS1

drive's

board

6 5

WfG

Register select,

reflects

head

is

not

installed,

HS3

Diskette Write

Drive

Head

Drive

Select

the

select

Change

Gate

current

and

write

bit 7 remains

Bit

Position

4

HS2

Flag

On

Select

(binary)

state

gate

3

HS1

of

the

floppy

signals.

tristated.

2 1

HSO

°If

the

change

floppy

DS2

flag

disk

and

the

option

0

DS1

Western Digital Corporation

47

Caviar AC140lAC280 Technical Reference ·Manual

Command

Recalibrate Seek Read Write Format

Track

Read

Verify Execute Set

Parameters Read

Write

Set Reserved

Diag.

Drive

Multiple

•

'a

0

iIC

U

.a.

:::a:::c

1X

7X

2X 3X

50

4X

90

91

C4

C5

C6

EO

7

.6

0

0 0 0 0

0 0 1 1

1 1 1 1 1 1

5

0

1 1

1

1 1

1

0

1

0

0 0 0 0

0

1

0 0 0

0 0

1

Binary

Opcode

4

1 X

1

0 0 0 L R

1

0

1 1

0

0 0 0

2 1

3

X X X

X X

0 0 0 0 0 0

0

0 0 0

1

0

1

1 1

0

X X

L R 0

0

R

0

0 0

1

0

0 0

1

0

Read

Buffer

Write

Buffer Identify Set

Buffer

Mode L =

Long

R =

Retry

X =

Don't

Drive

mode

bit

Care

Table

bit

E8

EC

EF

5-6.

1 1 1

1 1 1 1 1 1

o =

Normal

1 =

Long

0=

Error

1 =

Error

Standard

Command

mode.

Mode retries

retries

Opcodes

0 0

0

normal

and

ECC

disabled

1

0

1 1 1

1 1 1 1

ECC

enabled

0 0

0 0 0

0

functions

E4

48 Western Digital Corporation

Host Interface

and

AT

Command

Set

5.3

5.3.1

Caviar

ACl40/AC280

Table

5-6

by

Western

To

initiate a controller

the

task

"

~validates

function.

Recalibrate

The

Recalibrate anywhere drive

asserts assertion setting TKO

The any read/cache

INTRQ.

bit

are

Reca segment

lists

the

Digital's

file

and

the

"contents-of

The

Caviar

(lOB)

command

on

the BSYand

of

SEEK

If

asserted

librate

command

associated

segment.

Commands

binary/hexadecimal

Caviar

intelligent

operation,

writes

the

commands

disk

to

cylinder

issues a seek

COMPlETE

the

read/write

in

the

with

the

command

the"1ask

are

causes

zero.

before

heads

Status

and

does

not

the

new

host

file briefly

the

to

updating

invalidate

codes

specific

drive.

first

transfers

to

the

registers

defined

Caviar

Upon

receipt

cylinder

the

cannot

Error

Registers,

any

physical

to

the

Command

and

then

in

the

to

move

the

of

the

zero.

The

Status

reach

cylinder

respectively.

cache

segments,

cylinder

number

each

command

pertinent

Register.

performs

following

read/write

command,

intelligent

Register,

clearing

zero,

becomes

supported

information

The

controller

-the

desired

subsections.

heads

from

the

intelligent

drive

waits

BSY,

and

the

ERR

bit

and

but

ensures

the

that

current

to

for

Register

Command SDH Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder D =

Low High

Drive

Designation

7

6 5

0 0 0

X X

Bit

Binary

X

4

1

D Don't Don't Don't Don't

Don't

X =

Don't

Opcode

3 2

X X

X X Care Care Care Care Care

Care

1

X X

0

X X

Western Digital Corporation 49

Caviar ACl40IAC280 Technical Reference Manual

5.3.2

Seek

(708)

The

Seek

command

task

file's

cylinder asserts seek SEEK COMPLETE

Seek associated segment. are until a cache

BSY

in

is

not

completed

COMPLETE

is

does

not

with

For

utilized,

Register

Command

SDH Write Sector

the

Precomp

Count

asserted

run

positions

number

the

Status

is

invalidate

the

performance

Seek

has

registers.

Register,

before

asserted,

when

any

new

physical

in

command

completed.

7

0

the

read/write

starts

the

Caviar

the

Caviar

the

heads

cache

cylinder

multi-tasking

references

6 5

heads

When

the

seek

returns

the

can

receive

reach

the

segments,

number

environments

the

cache

Binary

over

the

cylinder

command

operation,

interrupt.

another

specified

but

ensures

becomes

where

hit

score

Opcode

4

3

is

received,

and

sets

If

BSY

is

command.

cylinder.

that

the

current

overlapped

and

2 1

1 1 1 X X X X

Drive

and

Head

Don't

Care

Don't

Care

specified

the

Caviar

INTRO.

cleared

defers

before

any

segment

read/cache

the

in

the

The

SEEK

seeks

seek

0

50

Sector

Number Cylinder Cylinder

X =

Don't

Low High

Care

Don't

Care

Starting

Cylinder

LSB

MSB

Western Digital Corporation

Host Interface

and

AT

Command

Set

5.3.3

Read

For a Read

location

256

of

an along are read

With monitored partitioning data. begins. for to before new

Sector

of

the

sectors,

zero

specifies

implied

data

the

Register

seek

with

the

enabled

from

each

CacheFlow,

to

If

the

If

the

before

seek.

read

disk

(20H)

Sector

command,

sectors

but

only

256

occurs.

data.

and

the

10ng

sector

the

perform changes physical

physical

the

seeking

cylinder,

Switching

operation.

the

transferred

single-sector

sectors. Single

is

requested

segment are cylinder

cylinder

other

If

the

If

the

long

burst

mode

is

transferred

sector

partitioning

not

required,

is

valid,

is

invalid,

operation

active

cache

cylinders

7

task

to

the

reads

drive mode

data

not

selected:

to

but

begins.

always

6

file's

registers

host.

The

are

allowed

is

not

positioned

bit

is

set,

errors

of

up

An

the

host.

address

and

sequential/repetitive

the

currently

00

data

other

active

If

the

segments

opens a new

Binary

5

determine

host

can

in

long

at

four

ECC

to

11

bits

interrupt

and

sector

active

segment

is

present, a read

cache

read

disk

operation

are

once

again cache

Opcode

4

3

the

number

request a maximum

mode. A sector the

specified

bytes

are

transferred

are

corrected

occurs'beforelhe

count

parameters

switching.

is

checked

disk

segments

must

checked

segment

2

are

1

and

count

cylinder, if

retries

data

are

for

operation

checked

proceed for

data

for

the

0

of

If

Command SDH Write

Precomp

Sector

Count

Sector

Number

Cylinder

Cylinder L=

Long

Western Digital Corporation

Low High

Mode

Bit

0 0

1

Sector

1 -

256

Starting

0 0 0

Size,

Drive

and

Don't

Care

Sectors

R =

to

Sector

Number

Cylinder

Retry

Bit

be

L R

Head

Read

LSB

MSB

51

Caviar ACl40IAC280 Technical Reference Manual

5.3.4

Write

For a Write drive, single-sector

is will

An

The the

ORO segment. segments

by

Sector

starting

writes

not

positioned

transfer

interrupt

first

data

the

Register

Command SOH

data request

must

disk

four

is

be

The

remain

write

(30B)

command,

at

the

logical

are

at

the

ECC

bytes

generated

buffer

contents

status

received

before

base

segment

valid.

Caching

operation

the

address

allowed

specified

along

as

the

are

bit

is

·on.· the

is

segments

become

7

0

host

transfers a number

specified

in

long

mode.

address.

with

data

sent

host

reserved

the

for

after

write

that

invalid

If

the

data.

each

the

buffers

for

contain

before

Binary

6 5

1

0

Sector

Size,

by

the

An

implied

long

mode

sector

host

has

begin

write

the

Opcode

4

1

Drive

of

sectors

task

file

seek

occurs

bit

is

required,

issued

the

transferring

operations.

sectors

that

write

is

completed.

2 1

3

0 0

and

Head

(1-256)

registers.

if

set,

then

except

command

to

Other

were

referenced

L R

to

the

Only

the

drive

the

host

the

first.

and

the

base

caching

0

52

Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder L=

Long

Mode

Low

High

Bit

Don't

Care

1 -

256

Sectors

Starting

Sector

Cylinder

R=

Retry

to

be

Written

Number

LSB

MSB

Bit

Western Digital Corporation

Host Interface

and

AT

Command Set

5.3.5

Format

The with entries, 1 through upon current executed identifies

table

•

Unused values bytes Register command.

Register

Track

track

specified

the

interleave

the

translation

on

any

is

composed

The

first

a

bad

sector.

The

second

bytes

are

specified

per

sector

must

An

that

bad

byte

may

correspond

interrupt

(SOH)

by

the

table

SPT

for

mode

SPT

value.

sector.

The

sectors

of

two

is

set

to

designates

be

uninitialized.

in

the

are

allowed.

is

task

file

is

transferred

the

track's

10

selected.

If

these

data

fields

on a given

bytes

per

sector

·OOH"

to

the

Sector

Count

The

with

the

generated

7

6 5

formatted

to

fields.

The

track

indicate a good

logical

The

Sectors-per-Track value upon

with

10

and

the

sector

buffer.

These

SPT

values

buffer

must

entries

are

not

present.

are

initialized

and

as

sector

Sectors-per-Track

and

SOH

indicated

completion

Binary

must

contain

follows:

sector

10

Registers,

Opcode

to

number

by

of

4

data

fields

The

buffer

are

contain

then

zeroes.

value

The

512

or

to

(1-SPT).

(SPT)

respectively.

in

the

Set

the

command.

3 2

in

accordance

contains

totally

dependent

descriptors

no

operation

interleave

bytes

of

data.

"SOH"

to

indicate

and

Sector-Size

Only

the

Sector

Drive

Parameters

1

SPT

for

the

table

This

512

Count

0

is

Command SOH Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder

Western Digital Corporation

low High

0

1

0

Sector

Sectors

Cylinder

1

Size,

Don't

Address

0 0 0 0

Drive

and

Head

Care

per

Track

Care

lSB

MSB

53

Caviar AC140lAC280 Technical Reference Manual

5.3.6

Read

The sectors

With monitored partitioning data. begins. for to before new

Verify

Read

Verify

are

CacheFlow,

to

If

the

If

the

data

before

the

seek.

read

disk

Register

Command SDH Write

Precomp

Sector

Count

(40H)

command

not

transferred

the

perform

changes

physical

the

seeking

Switching

operation.

is

the

to

requested segment

are

not

required,

cylinder

other

is

cylinder

operation

active

cylinders

7 6

a

same

as a Read

the

host.

sector

partitioning

the

valid,

but

is

invalid,

begins.

cache

always

1

Sector

command

address

segments

and

sequential/repetitive

currently

no.

data

is

other

active

If

the

read

are

opens a new

Binary

4

5

0 0

Size,

Don't

1 -

256

Sectors

except

that

sector

count

active

segment

present, a read

cache

segments

disk

operation

once

again

checked

cache

Opcode

2 1

3

0 0 0

Drive

and

Head

Care

to

Verify

the

requested

parameters

switching.

is

checked

disk

operation

are

checked

must

proceed

for

data

segment

for

0

R

are

If

for

the

54

Sector

Number Cylinder Cylinder R =

Retry

Low High

Bit

Starting

Sector

Starting

Number

Cylinder

LSB

MSB

Western Digital Corporation

Host Interface

and

AT

Command

Set

5.3.7

Execute

The

Execute

routines

01 02 03 04

.

05

ax

The

following

•

• A

If

the diagnostics) performed slave been

waits

returned

Diagnostics

and

No

Error

Not

Applicable Buffer WD42C22

:Microprocessor

Slave

ROM

checksum

RAM

test.

tional)

buffer

external

register

Caviar

its

drive

selected,

issued

up

to

five

as

zero

Diagnostics

to

report a result

RAM

error

register

Interna1

drive

failed

tests

are

performed:

test

Tests 2 Kbytes

RAM.

An

RAM

and

then

test

of

the

is

configured

line. A slave

diagnostics.

both

to

the

master seconds to

the

host

(908)

command

error

WD42C22.

drive

If

drives

drive.

for

causes

code

in

RAM

of

the

microprocessor

incrementing

read

back.

as a master

pulls

the

Execute

execute

The

the

slave

following

the

Error

error

orROM

pattern

drive,

this

line

Diagnostics

the

master

drive

the

Execute

Caviar

to Register '

checksum

and

is

written

it

monitors

active

low

command

drive's

task

to

assert

PDIAG.

Diagnostics

execute as

follows:

error

the

8-Kbyte

to

both

once

just

as

file

drives

its

self-test

(32-Kbyte

internal

the

PDIAG

it

has

successfully

is

issued

if

the

command

the

bus,

The D bit

command.

is

op-

and

(passed

with

the

had

and

it

always

Register

Command SDH Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder

Low High

7 6

1

0 0

Binary

5

4

1

Drive Don't Don't Don't Don't Don't

Opcode

2 1

3

0 0 0 0

Care Care Care Care Care

0

Western Digital Corporation 55

Caviar AC140lAC280 Technical Reference Manual

5.3.8

Set

Drive

The

Set sectors SOH

Register

SPT

and and a value

recommended.

Register

Command SOH Write Sector Sector Cylinder

Cylinder

Parameters

Drive

Parameters

per

track

determine

heads,

the

of

10

These

Precomp

Count Number

low

High

command

(SPT)

and

heads.

SPT

Caviar

will

heads

for

the

configurations

7

1

(91B)

The

and

heads,

always

Caviar

6 5

0 0

configures

values

be

AC280

yield

the

in

respectively.

in

translation

and 5 heads

980

host-addressable

Binary

Drive

Don't

Sectors

Don't Don't Don't

Caviar

the

Sector

Regardless

mode. A value

Opcode

4

3

1

0 0 0

and

Heads

Care

per

Track Care Care Care

for a specific

Count

register

of

the

of

for

the

Caviar

cylinders.

2 1

number

and

the

values

17

for

SPT

AC140

are

0 1

of

for

56

Western Digital Corporation

Host Interface

and

AT

Command

Set

5.3.9

Read

The for

•

Interrupts per is

(not

block Caviar

the

Multiple (C4H)

Read

the

following

Data Long

Retries

block

issued,

blocks

transfers

must

command

Register

Command SOH

Multiple

conditions:

transfers bit

is

invalid.

are

always

and

DRDs

is

set

using

the

Sector

or

block

are

be

in

multiple

aborts.

command

occur

count).

completed

operates

in

multiple

performed.

once

the

Set

Multiple

Count

value Sector

mode

7 6

1 1

per

sets

count

when

for

similarly

sector

blocks.

block

of

multiple

command.

the

total

need

the

remaining

this

command

Binary

5

0 0

Sector

to

the

Read

sectors.

When

number

not

be a multiple sectors

to

operate

Opcode

4

Size,

Drive

Sectors

the

Read

of

sectors

are

3

0

and

command

The

number

Multiple

to

of

the

ready

for

correctly.

2

1

Head

except

of

sectors

command

be

transferred

block.

Partial

transfer.

Otherwise,

1

0

The

0 0

Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder Long

Mode

Western Digital Corporation

Low High

Bit

invalid

for

this

command.

1 -

256

Starting

Retries

Don't

Care

Sectors

Sector

Cylinder

always

to

be

Read

Number

LSB

MSB

allowed

57

Caviar ACl40IAC280 Technical Reference Manual

i

5.3.10

Write Multiple (C5H)

The

Write

Multiple

except

for

the

•

Data

transfers

•

long

bit

•

Retries

Interrupts Sectors-per-Block Multiple to

be

the

block.

for

transfer.

correctly. ORO

segment. segments by

the

Register

are

and

command

transferred

Partial

The

Otherwise,

must

be

The

remain

disk

write

command

following

occur

is

invalid.

always

DROs

value

is

issued,

(not

block

Caviar

the

received

base

valid.

operation

conditions:

in

performed.

occur

is

set

blocks

transfers

must command

before

segment

Caching

become

operates

multiple

once

per

using

the

Sector

or

block

are

completed

be

in

aborts.

the

host

is

reserved

segments

similarly

sector

block

the

Set

Count

count).

multiple

write

that

inva

lid

blocks.

of

multiple

Multiple

value

Sector

when

mode

buffers

for

write

contain

before

Binary

to

the

command.

sets

the

count

the

rema

for

this

begin

operations.

sectors

the

write

Opcode

Write

Sectors

sectors.

need

transferring

The

When

total

number

not

be a multiple

ining

sectors

command

Other

that

were

is

completed.

command

Number

the

to

referenced

Write

of

sectors

are

ready

operate

the

base

caching

of

58

Command SOH Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder long

low High

Mode

Bit

invalid

7

1 1

for

this

6 5

0 0 0

Sector

1 -

256

Starting

command.

4

Size,

Don't

Sectors

Sector

Cylinder

Retries

Drive

Care

to

always

2 1

3

1

and

Head

be

Written

Number

lSB

MSB

allowed

0

1

Western Digital Corporation

5.3.11

Set

Multiple (C6H)

The

Set

Multiple between Number maximum command multiple

the

host

of

Sectors-per-Block

number

termination. A value

mode.

command

and

of

sets

the

Caviar

sectors

Host Interface

the

number

for

the

Read

value

is

loaded

per

block

is

eight. A value

of

one

is

considered

of

sectors

and

into

Write

and

AT

Command Set

per

block

Multiple

the

Sector

Count

beyond

valid. A value

to

be

transferred

commands.

register.

the

limit

causes

of

zero

disables

The The

I

I.

,;

'1

!)

Register

Command SDH Write

Precomp

Sector

Cou

nt

Sector

Number Cylinder Cylinder

D =

Low High

Drive

Designation

7

1

X X

Bit

6 5

1

0 0 0

X

Number

Binary

Opcode

4

D

Don't

of

SectorS/Block Don't Don't Don't

X =

Don't

2 1

3

1

X X X

Care

Care Care Care

Care

1

0 0

X

Western Digital Corporation

59

Caviar AC140lAC280 Technical Reference

Manual

5.3.12

Read

The RAM

Buffer (E4H)

Read

cache,

Register

Command SOH Write

Precomp Sector Sector Cylinder Cylinder

o =

Drive

Buffer

command

i.e.,

the

Count

Number

low

High

Designation

allows

the

512

bytes

of

the

7

..

Bit

6 5

1 1

1

X X X 0

host

first

to

read

sector

Binary

Don't Don't Don't Don't Don't

X =

"Buffer

buffer

Opcode

4

0

Care Care Care Care Care

Don't

in

the

3

0

X

Care

0"

of

the

base

2 1 1

X

Caviar cache

segment.

0 0

X X

32-Kbyte

0

60

Western Digital Corporation

Host Interface

and

AT

Command

Set

5.3.13

Write

The that

Buffer

Write

512

Note:

Register

Command SDH Write

Precomp Sector Sector

Cylinder Cylinder

D =

Drive

(E8B)

Buffer

command

bytes

of

data

The

Read

bytes

of

Count Number

Low High

Designation

functions

are

transferred

and

Write

Buffer

the

Caviar

RAM

7

6 5

1 1 1 0

X

Bit

identically

from

commands

cache.

to

the

Read

Buffer

the

host

to

the

Caviar

only

affect

Binary

X D X X X

4

Don't Don't Don't Don't Don't X =

Don't

Opcode

3

1

Care Care Care Care Care

Care

command

RAM

the

first

2

0 0

cache.

512

1

except

0 0

X

Western Digital Corporation

61

Caviar AC140lAC280 Technical Reference Manual

5.3.14

Identify Drive (ECH)

The

Identify

parameters.

when

Register

Command

SDH Write Sector

Sector

Cylinder

Cylinder D =

The

the

Caviar

Precomp

Count Number

low

High

Drive

Designation

Drive

host

sets

command

is

required

DRO

and

7

X X X D X X X X

Bit

transfers

to

IRO.

6

1 1

512

read

Table

bytes

the

parameters

5-7

lists

Binary

5

1

Don't Don't Don't Don't Don't X =

of

data

the

parameters

Opcode

4

0

Care Care Care Care Care

Don't

that

out

of

2 1

3

1 1

Care

specify

the

sector

read

0 0

the

by

drive's

buffer

the

host.

0

62

Western Digital Corporation

Host Interface

and

AT

Command

Set

Word

0

1 2 3 4 5

6

7 8 9 10

-19

20

21 22

Description·

General Number Number Number Unformatted Unformatted Physical Minimum Reserved Minimum Serial Controller Controller Number

configuration of

fixed

of

removable

of

heads

bytes bytes

sectors

size

PlO

number

type buffer

of

ECC

cylinders

(10)

per per

per

track

of

ISG

bytes

(14)

(ASCII

characters,

(3)

size

bytes

(427A

hex)

(980)

cylinders

(5)

track

sector

in

bytes

in

512-byte

transferred

(0)

(9656)

(568)

(17)

(7)

WOnnnnnn)

increments

on

long

(62)

operations

(4) 23-26 27

-46

47

48

49 50-255

*

Note:

Western Digital Corporation

Firmware Controller

WOAC140) Number Double Relocation Reserved

The

data

bytes

of

Rev.

(ASCII

model

of

sectors/interrupt

word

I/O

capabilities

structure

for

information

Table

5-7.

characters,

number

(0)

the

identify

Identify

(ASCII

on

drive

Drive

Command

X.XX)

characters,

read/write

command

WOAC280

multiples

(B008

contains

or

hex)

512

63

Caviar AC140lAC280 Technical Reference Manual

5.3.15

Set

Buffer Mode (EFH)

The

Set

Buffer Precompensation Precompensation

defau

It

number

to

enable

caching

Register

Command SDH Write

Precomp

Sector

Count

Sector

Number Cylinder Cylinder D = X=Don't

Low High

Drive

Care

Mode

Register

of

cache

with

Designation

command

is

set

segments,

one

to

five

7

1

X X X D X X

Bit

enables

set

to

MH,

to

55H,

then

the

Precompensation

segments

Binary

6 5

1

MH

55H

disables

or

disables

then

CacheFlow

as

speCified

Opcode

4

3

1 1

0

or

55H,

A1

Don't

Care

Don't

Care

Don't

Care

Don't

Care

enables

look-ahead look-ahead

is

Reg

H-A5H

CacheFlow.

is

enabled.

disabled.

ister

is

in

the

following

2 1

read.

To

set

modify

to

A 1

table.

1

X

If

the

If

the the

H-A5H

0

1

X

64

A 1 H A2H A3H A4H A5H

enables enables enables enables

enables

caching caching caching caching caching

with 1 segment. with 2 segments. with 3 segments. with 4 segments. with 5 segments.

Western Digital Corporation

Host Interface

and

AT

Command Set

5.4

Host

Interface

--I~--

HOST DATA 0.15 :HOST DATA

...................................

(Data Port Only) IOCS16 : :

---

Read

Timing

ADDRESS VALID TIME

(HAO·2)

, ,

! tASU1, !

i'

'\

, . ,

,

: tCS01: tMRIRA tAH1 :

, ' ,

I • •

' .

'.

, ,

: tRCY : :

:'

j

: .

.

, .

:

tDV1

, :

-:

BUS

--~r---

tClCSV

, tAlCSV

, ,

,

.

I

'.

i

•

:+-----+'

. : "

"'--j

tRO-+R

---iL

:.

.'

tOH1

:.;.--

VALID

. :

(HDO·HD15)

.

tAlCSI tCieSI

. ,

,

I---

:r-

,

.

Western Digital Corporation

SYMBOL DESCRIPTION

tABUI

tCS01 !MRIRA

tAH1 tOV1

tDH1 tRDR tClCSV tAlCSV tClCSI tAlCSI tRCY

Note:

All

Figure

Address Chip

Chip

Data Data Data

~sread

~ ~

Read cycle time·

Read

unI1s

of me8SI.II8rI18I1

All

values

5-2.

Host

setup

select setup

110

read active·

I/O read active • olher ports

seIectIAddress valid time • valid time • other ports hold

time

valid from

~

valid

inactive form inactive form

cycle

time

based

are

on a maxlmum

Interface

time

Port

0

hold

Port

0

reco~

em>

from

HAO

~

HAO

Port

0

• olher ports

In

nanoaec:onds,

load

capacitance

Read

Timing

time

unless

MIN

30

22

75

100

10

5

20

444

150

olhelWlse

01

50

pl.

MAX

60

100

50

42

40

47

45

noted.

65

Caviar AC140lAC280 Technical Reference ·Manual

5.5

Host

Interlace

(Data Port Only)

Write

--1_1---

~

~:.

Timing

ADDRESS VALID TIME (HA0-2)

, ,

l tASUI, l

':

, ,

:

I~

I l .

: : I

: tCS02: tAH2 :

tASU2: tlWA fCHW:

:

I I I I

I.

• • •

i l

i5W!

1 i i !

, , '

: : :

, , '

: tDV2 : tDH4 :

I I I I

•

HOST DATA 0-15 :HOST DATA BUS VALID (HDO-HD15)

I"

tWCY i :

:.

--------------~~-----

tClCSV

, tAlCSV

, ,

Il%m

H

I

1+--------+:

tWER

:l

I

!1

i

.:

,

: tAlCSI : tClCSI

, ,

~

:r-

.:

,

"

L

66

SYMBOL tASU2

tCS02 tlWA

tAH2 tOV2

tDH4 tCHW tCICSV tAlCSV tCICSI tAlCSI tWCY

tWER

No

..

:

Nt

Figure

DESCRIPTION

Address

Chip

I/O

110

Address

Data Data Data hold time

I8'l

~ ~ ~

Write cycle Write Write

units

01

All

V1IIu8s

5-3.

Host

setup

select setup time read read

setup setup

select hold

s

16 valid from

cycle

~rement

balled on a

Interface

time

actM! - Port 0 75

active - other ports

hold

time

- Port 0

- other ports time

valid inactive inactive form

recovery

~

from

HAO

form

time

- Port 0

time - other ports

time

are

In

11IIIlCIII8COI'ds,

maximum

Write

Western Digital Corporation

MIN

30 22

100

20

50 50 15 10

~

HAO

load capacitance of

444

150

20

unIe8s

Timing

MAX

42

40

47 45

otherwise nollld.

50

pf.

Host Interface

and

AT

Command

Set

5.6

Error

Table The

Reporting

5-8

lists

Caviar determine command point

Recal Seek Read-Read Write Write

Format

ReadVerifv Execute Set

Parameters Read Write Set Read

Write

Identify Set Invalid

Command BBD UNC

IDNF

AC

DRDY

-

Also

• -

where

ClllDlllaRd

ibrate·

Long--

Long

Track

Diag.

Drive

MultiDle

Buffer

Drive

Buffer

sets

Also

sets

if

is

Mode

TKO

DAMNF

all

the

valid

drive

checks

any

condition

then

attempted.

it

is

encountered.

BBD

V V V V V V V V V V V V V V

V V V

V V V V V V V V

Bad

Uncorrectable 10

Not

Abort

Drive

in

&mr

Register

in

Error

error

the

exists

UNC

V

Block

Detected

Found

Command

Not

Readv

if

track

Reaister

if

conditions

Command

which

Any

subsequent

IDNF

Data

&!Or

&!Or &mr

zero

not

data

address

which

can

occur

for a given

Register

could

AC

V V V V V V V V

V V V V V V

V V V V V

V

V V V V V V

V

V V V

DWF DSC CORR

ERR

V

found

.

men:

at

the

start

of

result

in a terminated

error

terminates

EmIr

........

DRDY

V V V

Drive Drive Data Error Valid

not

found.

DWF

Write

Seek

was

Bit

&!Orfor

the

DSC

V

Fault

Complete

Corrected

is

Status

Command

command.

a

command

command.

command

Detected

Register

at

CORR

V

V V

&mr

to

The

the

ERR

V

Table

5-8.

Error

Reporting

Western Digital Corporation 67

Caviar AC140lAC280 Technical Reference Manual

68

Western Digital Corporation

Installation

and

Set-Up Procedures

6.0

6.1

INSTALLATION AND SETUP PROCEDURES

Unpacking

6.1.1

6.1.2

Handling

-

Western unpacking mechanical and

void

in

its

damage,

Precautions

·I)jgital··products and

installing

shock

or

the

warranty.

proper

host

enclosure,

do

not

unpack

are·

designed-~to

the

drive.

electrostatic

When

your

discharge

the

it

must

Caviar

be

placed

until

Inspection 0/ Shipping Container

Carefully crushing, observe position

Removal

Remove

Carefully When the

its stand

examine

or any indicated

the

open

removing

bezel

(if

antistatic

the

Caviar

the

stains.

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from

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box.

the

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container

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its

on

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when excessive the

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to

Never from severely cuitboard.

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disk

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sealed

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assembly.

compartment.

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Do

Western Digital Corporation 69

Caviar AC140lAC280 Technical Reference Manual

6.2

6.1.3

6.1.4

6.2.1

Removal

Before

•

Make

•

Wear a properly

•

Avoid

After

attaching Handle circuit downward

Moving

If

it

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where

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properly

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6.2.2

design dimensions

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of

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and

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CAUTION:

mounted system. location

mounted

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threads

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of

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to

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the

physical

mounting

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70 Western Digital Corporation

Installation

and

Set-Up Procedures

6.3

Installation

6.3.1

Determining

You

can

configure

•

The

drive

.....• •

The

drive

in

the

Both

configurations

If

you

are installation). a

4O-pin

host

to

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motherboard

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•

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•

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using

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use a 4O-pin

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adapter

drive:

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parallel

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of

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to a 4O-pin

adapter

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two

card

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card.

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intelligent intelligent intelligent

ways:

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hard

disk

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motherboard.

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ofthe-expansion

drives

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floppy

three

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the

two

adapter

drives.

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use

drives

cards

6.3.2

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installations designated secondary other

intelligent

is

not

compatible

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can

install

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configured

PC/AT-compatible

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installation

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also

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Western Digital Corporation

as

the

(slave)

drives

with

the

as

able

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adapter

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that

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for

all

you

use

the

71

Caviar AC140lAC280 Technical Reference Manual

6.3.3

Jumper

The

Caviar

drive.

If

you

do

not

single

drive

Note:

.

-"-nVE/SLAVFPRESENr(DASP)

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the

connector illustration

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protocol

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designate

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installation,

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feature

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Attachment)

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configuration,

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configured

drive

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drive

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Western Digital Corporation

IBM,

and as a second master,

to

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it

and

Installation

and

Set-Up Procedures

"'----:-~

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6.4

6.4.1

Single (Standard Installation)

5 3 1

III::

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Dual

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6 4 2

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(Slave)

Dual

(Slave)

with Conner CP342 or CP3022

Installing

the

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lower

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as

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Figure

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position

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CAUTION:

Western Digital Corporation

and

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your

interface

on

you

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tion, drive pin

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at

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cable

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shows

from

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incor-

noise

two

is

73

Caviar AC140lAC280 Technical Reference Manual

1.

2.

3.

39

,

••••••••••••••••••••

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74

Western Digital Corporation

Figure

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wire

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Power

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drive

installations:

will

require a V-adapter

6-4.

power

supply

drive

bay.

connector

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in

your

you

do

to

computer.

Western Digital Corporation

75

Caviar ACl40IAC280 Technical Reference "Manual

To

MoIhaIboanI

01'

Adapter

IIoanI

Figure

6-4.

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7.

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CAUTION:

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tion6.6.

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end

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card.

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Western Digital Corporation

6.S Installing the Adapter Card

If

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6.6

NOTE.·Remove

For

more Literature Installation

SetopProcedures

6.6.1

Preparing

The

Caviar complement before contact as

described

Your

computer

ROM-based

to

system, hardware manual

lers

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information

Distribution

Guide

(Part

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is

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(MS-DOS

in

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Western Digital Corporation

77

Caviar AC140lAC280 Technical Re[erence Manual

6.6.2

Selecting Drive Tables

One

step

in

your

type

of

drive

used

type:

•

If

you

are

from

the

drive

typically

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tables

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physical

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drive

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of

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Western Digital Corporation

83,300 83,045 83,300 83,200

166,600 166,400 166,518 166,600

Installation

and

Set-Up Procedures

6.6.3

Partitioning

You

need

to

partition Partitioning disk

drives.

you

partition

Your

•

maximum party

•

If

to

Bytes

•

If

drive(s)

partition.

"FDISK" manual

divides

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the

version

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If

you

have a DOS

software.

you

have

partition

per

you

are

working

into

automatically

for

more

the

Drive

your

the

DOS

hard

disk

DOS

determines

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on

your

drive.

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DOS

version

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drives

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with

one

or

more

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drive(s)

disk

into

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logical

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to

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how

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display a series

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the

drive(s)

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requirements.

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second-

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MBytes

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32

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the

disk

per

system

6.6.4

High-level DOS

High-level the

If

you

format

"A:"

prompt.

designated

those

drives

the

other

Formatting

first

logical

drives

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drive

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partitions

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drive)

during

by

the

"FDISK"

entering

routine,

"FORMAT

you

C:/S"

need

Western Digital Corporation 79

at

to

Caviar AC140lAC280 Technical Reference Manual

6.6.5

6.6.6

Preparing

If

you

are

installing

following

After Novell

Booting

After intelligent

parameters: Format Maintain Enter

media Number Number Are

parameters

running

installation

the

you

have

drive,

the

Caviar

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the

disk?

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current

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of

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Western Digital Corporation

81

Caviar AC140lAC280 Technical Reference Manual

82 Western Digital Corporation

Western Digital Drive Utility

8.0

WESTERN

All

Caviar factory. defects. DOS WDAT user WDATJDE defective track non-recoverable

Technical Support Bulletin Board

You Technical

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Caviar AC140lAC280 Technical Reference Manual

The

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Western Digital Corporation 85

Caviar AC140lAC280 Technical Reference Manual

86

Western Digital Corporation

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10.0

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Caviar AC140lAC280 Technical Reference Manual

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89

and

Caviar ACl40IAC280 Technical Reference Manual

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Western Digital AC280, WDAC140 Technical Reference Manual

Specifications and Main Features

Frequently Asked Questions

User Manual