HP C2488A Manuale del prodotto

C2486Aj88Aj90A

3.5-inch SCSI-2 Disk Drives

Technical

Reference

Manual

Fli;-

HEWLETT

PACKARD

Part No. xxxx-xxxx

Printed in U.S.A. September 1992

Edition 1

DRAFT 1/18/93 09:58

Printing

History

This manual will be revised without notice in order

reflect

the

latest

version of

the

product

describes. New editions are complete revisions of

the

manual.

The

dates

the

title

page

change only when a new edition is published.

Many

product

updates

not

require manual changes and, conversely, manual corrections

may be done

without

accompanying product changes.

Edition 1

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

September 1992

DRAFT

iii

1718/93 09:58

Contents

Product

Specifications

Product

Description

Key Features . .

Interface Options .

Specials

.....

Related Documentation

Disk Drive Capacities .

Operating

Specifications

DC Power Characteristics

Environmental Requirements

Product

Installation

Introduction

. . . . . . . . . . .

Handling Guidelines . . . . . . . .

Protection

From Mechanical Shock

Protection

from Electrostatic Discharge (ESD)

Unpacking

the

Disk Drive

.....

Inspecting

the

Shipping Container

Inspecting

the

Disk Drive

Recording

the

Serial Number

Disk Drive

Returns

. . . . .

Return

Shipment Addresses

Vendor Purchases

....

Hewlett-Packard Direct Purchases .

Re-Packing For Shipment

Mounting Information . . . . . . . .

Safety

/Regulatory

Compliance . . .

Chassis Dimensions

and

Mounting Screw Locations

Physical Mounting

Airflow Requirements . . . . . . . .

Front Panel LED Indicator . .

. . . .

Address

and

Configuration Pin-Set Set-ups

Drive To Interface Connections . . . .

Interface Connectors

and

Cables

DRAFT

Connector Dimensions

and

Locations

SCSI Connector

......

Power Connector

Mating

Connector Requirements

Cabling Requirements

Single-ended Cable

Differential Cable .

1/18/93 09:58

1-1

1-2

1-4

1-6

1-9

1-10

2-1

2-2

2-3

2-5

2-6

2-8

2-9

2-10

Contents-1

3. Product Features

Introduction

Functional Description .

Disk

Format

Sector

Format

Addressing

Structure

Error

Correction Code

Cyclic Redundancy Check

(CRC)

Track Sparing

Look Ahead Reads

Head Alignments

Head Alignment States

Head Alignment Modes

Typical Head Alignment Times

Command

Queuing

Error

Recovery

Synchronized Spindle Operation

Assembly Descriptions .

Head/Disk

Assembly

Disks

Heads

Actuator

and Latch Assembly

Head Interface Electronics

Atmospheric Controls

Vibration Isolators

Spindle Assembly

Block Diagram

SCSI Interface

RAM Buffer

Disk Controller

Data

Encoder/Decoder

Microcontroller

Servo Processor .

Data

Head Interface

Actuator

Driver

Servo

Timing

Spindle

Motor

Driver

Power Distribution

4. SCSI Interface

Introduction

Supported Functions

Status

Byte

SCSI Message Support .

Target

Error

Conditions

Message

Out

Phase

Parity

Error

Command

Data

Out

Phase

Parity

Error

lllegal Messages .

Reselection

Timeout

Contents-2

3-1

3-2

3-3

3-4

3-6

3-7

3-8

3-9

4-1

4-6

4-7

4-8

DRAFT

1/18/93 09:58

SCSI

Command

Descriptions

Command

Descriptions A-I

Command

Details . A-I

Control

Byte

A-2

Change

Definition.

A-6

Format

Unit A-7

Inquiry

A-ll

Mode Select, -Mode Sense A-15

Read A-31

Read Buffer A-32

Read Capacity A-33

Read Defect

Data

. A-34

Read Long A-36

Reassign Blocks . A-37

Receive Diagnostic Results A-39

Release A-41

Request Sense A-42

Reserve A-48

Rezero Unit A-49

Seek.

A-50

Send Diagnostic A-51

Start/Stop

Unit

A-53

Synchronize Cache A-54

Test Unit Ready A-55

Verify A-56

Write

A-57

Write

And Verify A-59

Write

Buffer A-60

Write

Long.

A-62

Write

Same A-63

B. Vendor Unique

Command

Descriptions

Command

Descriptions B-1

Access

Log.

B-2

Change SCSI ID B-7

Change Wide SCSI ID B-8

Execute

Data.

B-9

Interface Control

B-I0

Manage

Primary

B-ll

Media

Test.

B-16

Read Full B-18

Read Headers B-20

Reformat Track . B-21

Write Full B-22

DRAFT

Contents-3

1/18/93 09:58

C. Vendor Unique Status Codes

Reference

E. Narrow, Single-Ended Drive Configurations

Terminator Power Source

Options.

. . . .

Index

Contents-4

E-4

DRAFT

1/18/93 09:58

Figures

1-1. Disk Drive Major Components 1-3

2-1. Single-Unit Packaging . . . . 2-3

2-2. Ten-Unit Packaging . . . . . 2-4

3-1. Disk Drive Addressing Structure 3-10

3-2. Formatted Physical Sector Allocation 3-14

3-3. Disk Drive Block Diagram . . . . . 3-15

E-1. Narrow, Single-Ended: Disk Drive Dimensions and Mounting Locations

E-l

E-2. Narrow, Single-Ended: Interface, Address and Option Connectors E-2

E-3. Narrow, Single-Ended: Connector Dimensions

. . E-5

E-4. Narrow, Single-Ended: Temperature Measuring

Points.

. . . . E-6

Tables

1-1. HP C2486A/88A/90A SCSI Disk Drive Capacities

1-2.

C2486A/88A/90A Operating Specifications . .

1-3. HP C2486A/88A/90A DC Power Characteristics .

1-4.

C2486A/88A/90A Environmental Requirements

2-1. Address/Configuration Pin-Set Information Locations

2-2. Address/Configuration Option Descriptions

2-3. Recommended Mating Connectors

......

3-1. C2486A/88A/90A Cylinder

Allocation.

. . .

4-1. HP C2486A/88A/90A Supported SCSI Commands

A-I. Supported SCSI-2 Commands

...

B-1. Vendor Unique Commands

.....

C-1. Vendor Unique DERROR

Status

Codes

D-1. Reference Appendix Contents

....

E-l.

Narrow, Single-Ended: Address and Option Connector Configurations

E-2. Narrow, Single-Ended: On-Board Terminator Power (TermPwr) Sources

E-3. Narrow, Single-Ended: SCSI Connector Pin Assignments

.....

DRAFT

1/18/93 09:58

1-4

1-6

1-9

1-10

2-6

2-7

2-9

3-11

4-4

A-3

B-1

C-l

D-l

E-3

E-4

E-5

Contents-5

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