Fujitsu MHK2090AT, MHK2120AT, MHJ2181AT, MHK2060AT User Manual

MHJ2181AT, MHK2120AT,

MHK2090AT, MHK2060AT

DISK DRIVES

C141-E088-01EN

PRODUCT MANUAL

FOR SAFE OPERATION

Handling of This Manual

This manual contains important information for using this product. Read thoroughly before using the product. Use this product only after thoroughly reading and understanding especially the section “Important Alert Items” in this manual. Keep this manual handy, and keep it carefully.

FUJITSU makes every effort to prevent users and bystanders from being injured or from suffering damage to their property. Use the product according to this manual.

IMPORTANT NOTE TO USERS

READ THE ENTIRE MANUAL CAREFULLY BEFORE USING THIS PRODUCT. INCORRECT USE OF THE PRODUCT MAY RESULT IN INJURY OR DAMAGE TO USERS, BYSTANDERS OR PROPERTY.

While FUJITSU has sought to ensure the accuracy of all information in this manual, FUJITSU assumes no liability to any party for any damage caused by any error or omission contained in this manual, its updates or supplements, whether such errors or omissions result from negligence, accident, or any other cause. In addition, FUJITSU assumes no liability with respect to the application or use of any product or system in accordance with the descriptions or instructions contained herein; including any liability for incidental or consequential damages arising therefrom. FUJITSU DISCLAIMS ALL WARRANTIES REGARDING THE INFORMATION CONTAINED HEREIN, WHETHER EXPRESSED, IMPLIED, OR STATUTORY.

FUJITSU reserves the right to make changes to any products described herein without further notice and without obligation.

The contents of this manual may be revised without prior notice.

The contents of this manual shall not be disclosed in any way or reproduced in any media without the express written permission of Fujitsu Limited.

 FUJITSU LIMITED 1999

C141-E088-01EN

This page is intentionally left blank.

Revision History

(1/1)

Edition Date Revised section (*1)

(Added/Deleted/Altered)

01 1999-07-20 — —

Details

*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.

C141-E088-01EN

This page is intentionally left blank.

This manual describes the MHJ Series and MHK Series, 2.5-inch hard disk drives. These drives have a built-in controller that is compatible with the ATA interface.

This manual describes the specifications and functions of the drives and explains in detail how to incorporate the drives into user systems. This manual assumes that the reader has a basic knowledge of hard disk drives and their implementations in computer systems.

This manual consists of seven chapters and sections explaining the special terminology and abbreviations used in this manual:

Overview of Manual

CHAPTER 1 Device Overview

This chapter gives an overview of the MHJ Series and MHK Series and describes their features.

Preface

CHAPTER 2 Device Configuration

This chapter describes the internal configurations of the MHJ Series and MHK Series and the configuration of the systems in which they operate.

CHAPTER 3 Installation Conditions

This chapter describes the external dimensions, installation conditions, and switch settings of the MHJ Series and MHK Series.

CHAPTER 4 Theory of Device Operation

This chapter describes the operation theory of the MHJ Series and MHK Series.

CHAPTER 5 Interface

This chapter describes the interface specifications of the MHJ Series and MHK Series.

CHAPTER 6 Operations

This chapter describes the operations of the MHJ Series and MHK Series.

Terminology

This section explains the special terminology used in this manual.

Abbreviation

This section gives the meanings of the definitions used in this manual.

C141-E088-01EN i

Preface

This indicates a hazarous situation could result in

minor or moderate personal injury if the user does

not perform the procedure correctly. This alert signal

also indicates that damages to the product or other

property, may occur if the user does not perform the

procedure correctly.

This indicates information that could help the user

use the product more efficiently.

Conventions for Alert Messages

This manual uses the following conventions to show the alert messages. An alert message consists of an alert signal and alert statements. The alert signal consists of an alert symbol and a signal word or just a signal word.

The following are the alert signals and their meanings:

In the text, the alert signal is centered, followed below by the indented message. A wider line space precedes and follows the alert message to show where the alert message begins and ends. The following is an example:

(Example)

Data corruption: Avoid mounting the disk drive near strong magnetic sources such as loud speakers. Ensure that the disk drive is not affected by external magnetic fields.

The main alert messages in the text are also listed in the “Important Alert Items.”

Operating Environment

This product is designed to be used in offices or computer rooms.

For details regarding the operating environment of use, refer to the (Cnnn-Xnnn) and the (Cnnn-Xnnn).

Attention

Please forward any comments you may have regarding this manual.

To make this manual easier for users to understand, opinions from readers are needed. Please write your opinions or requests on the Comment at the back of this manual and forward it to the address described in the sheet.

ii C141-E088-01EN

Liability Exception

“Disk drive defects” refers to defects that involve adjustment, repair, or replacement.

Fujitsu is not liable for any other disk drive defects, such as those caused by user misoperation or mishandling, inappropriate operating environments, defects in the power supply or cable, problems of the host system, or other causes outside the disk drive.

Preface

C141-E088-01EN iii

This page is intentionally left blank.

Important Alert Items

A hazardous situation could result in minor or moderate personal

injury if the user does not perform the procedure correctly. Also,

damage to the predate or other property, may occur if the user does not

perform the procedure correctly.

Alert message

Page

Normal Operation

Data corruption: Avoid mounting the disk near strong

magnetic soures such as loud speakers. Ensure that the disk

drive is not affected by extrnal magnetic fields.

Stastic: When handling the device, disconnect the body

ground (500 kΩ or greater). Do not touch the printed circuit

board, but hold it by the edges.

3-8

Important Alert Messages

The important alert messages in this manual are as follows:

Task

C141-E088-01EN v

This page is intentionally left blank.

MHJ2181AT, MHK2120AT,

MHK2090AT, MHK2060AT

DISK DRIVES

PRODUCT MANUAL

(C141-E088)

Device Overview

Device Configuration

Installation Conditions

Theory of Device Operation

Interface

Operations

MHJ2181AT, MHK2120AT,

MHK2090AT, MHK2060AT

DISK DRIVES

MAINTENANCE MANUAL

(C141-F038)

Maintenance and Diagnosis

Removal and Replacement Procedure

Manual Organization

•

C141-E088-01EN vii

This page is intentionally left blank.

CHAPTER 1 Device Overview........................................................................1-1

1.1 Features 1-2

1.1.1 Functions and performance 1-2

1.1.2 Adaptability 1-2

1.1.3 Interface 1-3

1.2 Device Specifications 1-4

1.2.1 Specifications summary 1-4

1.2.2 Model and product number 1-5

1.3 Power Requirements 1-5

1.4 Environmental Specifications 1-7

1.5 Acoustic Noise 1-8

1.6 Shock and Vibration 1-8

1.7 Reliability 1-9

1.8 Error Rate 1-10

1.9 Media Defects 1-10

CHAPTER 2 Device Configuration................................................................2-1

2.1 Device Configuration 2-2

2.2 System Configuration 2-4

2.2.1 ATA interface 2-4

2.2.2 1 drive connection 2-4

2.2.3 2 drives connection 2-4

C141-E088-01EN ix

Contents

CHAPTER 3 Installation Conditions..............................................................3-1

3.1 Dimensions 3-2

3.2 Mounting 3-4

3.3 Cable Connections 3-9

3.3.1 Device connector 3-9

3.3.2 Cable connector specifications 3-10

3.3.3 Device connection 3-10

3.3.4 Power supply connector (CN1) 3-11

3.4 Jumper Settings 3-11

3.4.1 Location of setting jumpers 3-11

3.4.2 Factory default setting 3-12

3.4.3 Master drive-slave drive setting 3-12

3.4.4 CSEL setting 3-13

CHAPTER 4 Theory of Device Operation...................................................... 4-1

4.1 Outline 4-2

4.2 Subassemblies 4-2

4.2.1 Disk 4-2

4.2.2 Head 4-2

4.2.3 Spindle 4-3

4.2.4 Actuator 4-3

4.2.5 Air filter 4-3

4.3 Circuit Configuration 4-4

4.4 Power-on Sequence 4-6

4.5 Self-calibration 4-7

4.5.1 Self-calibration contents 4-7

4.5.2 Execution timing of self-calibration 4-8

4.5.3 Command processing during self-calibration 4-9

4.6 Read/write Circuit 4-9

x C141-E088-01EN

Contents

4.6.1 Read/write preamplifier (PreAMP) 4-9

4.6.2 Write circuit 4-10

4.6.3 Read circuit 4-12

4.6.4 Digital PLL circuit 4-13

4.7 Servo Control 4-14

4.7.1 Servo control circuit 4-14

4.7.2 Data-surface servo format 4-18

4.7.3 Servo frame format 4-18

4.7.4 Actuator motor control 4-19

4.7.5 Spindle motor control 4-20

CHAPTER 5 Interface.....................................................................................5-1

5.1 Physical Interface 5-2

5.1.1 Interface signals 5-2

5.1.2 Signal assignment on the connector 5-3

5.2 Logical Interface 5-6

5.2.1 I/O registers 5-7

5.2.2 Command block registers 5-8

5.2.3 Control block registers 5-13

5.3 Host Commands 5-13

5.3.1 Command code and parameters 5-14

5.3.2 Command descriptions 5-16

5.3.3 Error posting 5-77

5.4 Command Protocol 5-79

5.4.1 Data transferring commands from device to host 5-79

5.4.2 Data transferring commands from host to device 5-81

5.4.3 Commands without data transfer 5-83

5.4.4 Other commands 5-84

5.4.5 DMA data transfer commands 5-84

5.5 Ultra DMA Feature Set 5-86

5.5.1 Overview 5-86

C141-E088-01EN xi

Contents

5.5.2 Phases of operation 5-87

5.5.2.1 Ultra DMA burst initiation phase 5-87

5.5.2.2 Data transfer phase 5-88

5.5.2.3 Ultra DMA burst termination phase 5-88

5.5.3 Ultra DMA data in commands 5-89

5.5.3.1 Initiating an Ultra DMA data in burst 5-89

5.5.3.2 The data in transfer 5-90

5.5.3.3 Pausing an Ultra DMA data in burst 5-90

5.5.3.4 Terminating an Ultra DMA data in burst 5-91

5.5.4 Ultra DMA data out commands 5-94

5.5.4.1 Initiating an Ultra DMA data out burst 5-94

5.5.4.2 The data out transfer 5-94

5.5.4.3 Pausing an Ultra DMA data out burst 5-95

5.5.4.4 Terminating an Ultra DMA data out burst 5-96

5.5.5 Ultra DMA CRC rules 5-98

5.5.6 Series termination required for Ultra DMA 5-100

5.6 Timing 5-101

5.6.1 PIO data transfer 5-101

5.6.2 Multiword DMA data transfer 5-103

5.6.3 Transfer of Ultra DMA data 5-104

5.6.3.1 Starting of Ultra DMA data In Burst 5-104

5.6.3.2 Ultra DMA data burst timing requirements 5-105

5.6.3.3 Sustained Ultra DMA data in burst 5-107

5.6.3.4 Host pausing an Ultra DMA data in burst 5-108

5.6.3.5 Device terminating an Ultra DMA data in burst 5-109

5.6.3.6 Host terminating an Ultra DMA data in burst 5-110

5.6.3.7 Initiating an Ultra DMA data out burst 5-111

5.6.3.8 Sustained Ultra DMA data out burst 5-112

5.6.3.9 Device pausing an Ultra DMA data out burst 5-113

5.6.3.10 Host terminating an Ultra DMA data out burst 5-114

5.6.3.11 Device terminating an Ultra DMA data in burst 5-115

5.6.4 Power-on and reset 5-116

xii C141-E088-01EN

Contents

CHAPTER 6 Operations.................................................................................6-1

6.1 Device Response to the Reset 6-2

6.1.1 Response to power-on 6-2

6.1.2 Response to hardware reset 6-4

6.1.3 Response to software reset 6-5

6.1.4 Response to diagnostic command 6-6

6.2 Address Translation 6-7

6.2.1 Default parameters 6-7

6.2.2 Logical address 6-8

6.3 Power Save 6-9

6.3.1 Power save mode 6-9

6.3.2 Power commands 6-11

6.4 Defect Management 6-11

6.4.1 Spare area 6-12

6.4.2 Alternating defective sectors 6-12

6.5 Read-Ahead Cache 6-14

6.5.1 Data buffer configuration 6-14

6.5.2 Caching operation 6-14

6.5.3 Usage of read segment 6-16

6.5.3.1 Mis-hit (no hit) 6-16

6.5.3.2 Sequential read 6-17

6.5.3.3 Full hit (hit all) 6-20

6.5.3.4 Partially hit 6-21

6.6 Write Cache 6-22

Glossary .................................................................................................GL-1

Acronyms and Abbreviations ........................................................................AB-1

Index ................................................................................................ ...IN-1

C141-E088-01EN xiii

Contents

Figures

Illustrations

Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on 1-6

Figure 2.1 Disk drive outerview (the MHJ Series and MHK Series) 2-2 Figure 2.2 Configuration of disk media heads 2-3 Figure 2.3 1 drive system configuration 2-4 Figure 2.4 2 drives configuration 2-4

Figure 3.1 Dimensions (MHJ/MHK series) 3-2 Figure 3.2 Orientation (Sample: MHJ2181AT) 3-4 Figure 3.3 Mounting frame structure 3-5 Figure 3.4 Location of breather 3-6 Figure 3.5 Surface temperature measurement points (Sample: MHJ2181AT)

3-7 Figure 3.6 Service area (Sample: MHJ2181AT) 3-8 Figure 3.7 Connector locations (Sample: MHJ2181AT) 3-9 Figure 3.8 Cable connections 3-10 Figure 3.9 Power supply connector pins (CN1) 3-11 Figure 3.10 Jumper location 3-11 Figure 3.11 Factory default setting 3-12 Figure 3.12 Jumper setting of master or slave device 3-12 Figure 3.13 CSEL setting 3-13 Figure 3.14 Example (1) of Cable Select 3-13 Figure 3.15 Example (2) of Cable Select 3-14

Figure 4.1 Head structure 4-3 Figure 4.2 Circuit Configuration 4-5 Figure 4.3 Power-on operation sequence 4-7 Figure 4.4 Read/write circuit block diagram 4-11 Figure 4.5 Frequency characteristic of programmable filter 4-12 Figure 4.6 Block diagram of servo control circuit 4-14 Figure 4.7 Physical sector servo configuration on disk surface 4-16 Figure 4.8 Servo frame format 4-18

Figure 5.1 Interface signals 5-2 Figure 5.2 Execution example of READ MULTIPLE command 5-20 Figure 5.3 Read Sector(s) command protocol 5-80

xiv C141-E088-01EN

Contents

Figure 5.4 Protocol for command abort 5-81 Figure 5.5 WRITE SECTOR(S) command protocol 5-82 Figure 5.6 Protocol for the command execution without data transfer 5-

84 Figure 5.7 Normal DMA data transfer 5-85 Figure 5.8 An example of generation of parallel CRC 5-99 Figure 5.9 Ultra DMA termination with pull-up or pull-down 5-100 Figure 5.10 Data transfer timing 5-102 Figure 5.11 Multiword DMA data transfer timing (mode 2) 5-103 Figure 5.12 Starting of Ultra DMA data In Burst transfer 5-104 Figure 5.13 Sustained Ultra DMA data in burst 5-107 Figure 5.14 Host pausing an Ultra DMA data in burst 5-108 Figure 5.15 Device terminating an Ultra DMA data in burst 5-109 Figure 5.16 Host terminating an Ultra DMA data in burst 5-110 Figure 5.17 Initiating an Ultra DMA data out burst 5-111 Figure 5.18 Sustained Ultra DMA data out burst 5-112 Figure 5.19 Device pausing an Ultra DMA data out burst 5-113 Figure 5.20 Host terminating an Ultra DMA data out burst 5-114 Figure 5.21 Device terminating an Ultra DMA data out burst 5-115 Figure 5.22 Power on Reset Timing 5-116

Tables

Figure 6.1 Response to power-on 6-3 Figure 6.2 Response to hardware reset 6-4 Figure 6.3 Response to software reset 6-5 Figure 6.4 Response to diagnostic command 6-6 Figure 6.5 Address translation (example in CHS mode) 6-8 Figure 6.6 Address translation (example in LBA mode) 6-9 Figure 6.7 Sector slip processing 6-12 Figure 6.8 Alternate cylinder assignment 6-13 Figure 6.9 Data buffer configuration 6-14

Table 1.1 Specifications 1-4 Table 1.2 Model names and product numbers 1-5 Table 1.3 Current and power dissipation 1-6 Table 1.4 Environmental specifications 1-7 Table 1.5 Acoustic noise specification 1-8 Table 1.6 Shock and vibration specification 1-8

Table 3.1 Surface temperature measurement points and standard values

3-7

C141-E088-01EN xv

Contents

Table 3.2 Cable connector specifications 3-10

Table 4.1 Self-calibration execution timechart 4-9 Table 4.2 Write precompensation algorithm 4-10

Table 5.1 Signal assignment on the interface connector 5-3 Table 5.2 I/O registers 5-7 Table 5.3 Command code and parameters 5-14 Table 5.4 Information to be read by IDENTIFY DEVICE command 5-

32 Table 5.5 Features register values and settable modes 5-40 Table 5.6 Diagnostic code 5-47 Table 5.7 Features Register values (subcommands) and functions 5-58 Table 5.8 Format of device attribute value data 5-62 Table 5.9 Format of insurance failure threshold value data 5-62 Table 5.10 SMART error log data format 5-66 Table 5.11 SMART self test log data format 5-68 Table 5.12 Contents of security password 5-70 Table 5.13 Contents of SECURITY SET PASSWORD data 5-74 Table 5.14 Relationship between combination of Identifier and Security

level, and operation of the lock function 5-74 Table 5.15 Command code and parameters 5-77 Table 5.16 Parallel generation equation of CRC polynomial 5-99 Table 5.17 Recommended series termination for Ultra DMA 5-100 Table 5.18 Ultra DMA data burst timing requirements 5-105

Table 6.1 Default parameters 6-7

xvi C141-E088-01EN

CHAPTER 1 Device Overview

1.1 Features

1.2 Device Specifications

1.3 Power Requirements

1.4 Environmental Specifications

1.5 Acoustic Noise

1.6 Shock and Vibration

1.7 Reliability

1.8 Error Rate

1.9 Media Defects

Overview and features are described in this chapter, and specifications and power requirement are described.

The MHJ Series and MHK Series controllers. These disk drives use the AT-bus hard disk interface protocol and are compact and reliable.

are 2.5-inch hard disk drives with built-in disk

C141-E088-01EN 1-1

Device Overview

1.1 Features

1.1.1 Functions and performance

The fillowing features of the MHJ Series and MHK Series are described.

(1) Compact

The MHJ2181AT has 3 disks, and its height is 12.5 mm (0.492 inch). The MHK2120AT, MHK2090AT and MHK2060AT have 1 disk or 2 disks of 65 mm (2.5 inches) diameter, and its height is 9.5 mm (0.374 inch).

(2) Large capacity

The disk drive can record up to 6.0 GB (formatted) on one disk using the 16/17 MTR recording method and 15 recording zone technology. The MHJ Series and MHK Series (MHK2120AT), 9.0 GB (MHK2090AT) and 6.0 GB (MHK2060AT) respectively.

have a formatted capacity of 18.1 GB (MHJ2181AT), 12.0 GB

(3) High-speed Transfer rate

The disk drives (the MHJ Series and MHK Series) have an internal data rate up to

22.3 MB/s. The disk drive supports an external data rate up to 66.6 MB/s (UDMA mode 4).

(4) Average positioning time

Use of a rotary voice coil motor in the head positioning mechanism greatly increases the positioning speed. The average positioning time is 13 ms (at read).

1.1.2 Adaptability

(1) Power save mode

The power save mode feature for idle operation, stand by and sleep modes makes The disk drives (the MHJ Series and MHK Series) ideal for applications where power consumption is a factor.

(2) Wide temperature range

The disk drives (the MHJ Series and MHK Series) can be used over a wide temperature range (5°C to 55°C).

(3) Low noise and vibration

In Ready status, the noise of the disk drives (the MHJ Series and MHK Series) is only about 30 dBA (measured at 1 m apart from the drive under the idle mode).

1-2 C141-E088-01EN

1.1.3 Interface

(1) Connection to interface

With the built-in ATA interface controller, the disk drives (the MHJ Series and MHK Series) can be connected to an ATA interface of a personal computer.

(2) 512-KB data buffer

The disk drives (the MHJ Series and MHK Series) uses a 512-KB data buffer to transfer data between the host and the disk media.

In combination with the read-ahead cache system described in item (3) and the write cache described in item (7), the buffer contributes to efficient I/O processing.

(3) Read-ahead cache system

After the execution of a disk read command, the disk drive automatically reads the subsequent data block and writes it to the data buffer (read ahead operation). This cache system enables fast data access. The next disk read command would normally cause another disk access. But, if the read ahead data corresponds to the data requested by the next read command, the data in the buffer can be transferred instead.

1.1 Features

(4) Master/slave

The disk drives (the MHJ Series and MHK Series) can be connected to ATA interface as daisy chain configuration. Drive 0 is a master device, drive 1 is a slave device.

(5) Error correction and retry by ECC

If a recoverable error occurs, the disk drives (the MHJ Series and MHK Series) themselves attempt error recovery. The ECC has improved buffer error correction for correctable data errors.

(6) Self-diagnosis

The disk drives (the MHJ Series and MHK Series) have a diagnostic function to check operation of the controller and disk drives. Executing the diagnostic command invokes self-diagnosis.

(7) Write cache

When the disk drives (the MHJ Series and MHK Series) receive a write command, the disk drives post the command completion at completion of transferring data to the data buffer completion of writing to the disk media. This feature reduces the access time at writing.

C141-E088-01EN 1-3

Device Overview

MHJ2181AT

MHK2060AT

Format Capacity (*1)

18.1 GB

12.0 GB

9.0 GB

6.0 GB

Number of Heads

Number of Cylinders (User)

14,784

Bytes per Sector

Recording Method

16/17 MTR

Track Density

24,300 TPI

Bit Density

383 Kbpi

Rotational Speed

4,200 rpm ± 1%

Average Latency

7.14 ms

Positioning time (read and seek)

• Minimum (Track to Track)

• Average

• Maximum (Full)

1.5 ms (typ.)

Read: 13 ms (typ.)

23 ms (typ.)

Start/Stop time

• Start (0 rpm to Drive Read)

• Stop (at Power Down)

Typ.: 5 sec

Interface

ATA-5 (Max. Cable length: 0.46 m)

Data Transfer Rate

• To/From Media

12.5 to 22.3 MB/s

• To/From Host

66.6 MB/s Max.

(U-DMA mode 4)

Data Buffer Size

512 KB

Physical Dimensions

(Height × Width × Depth)

12.5 mm

100.0 mm

70.0 mm

9.5 mm × 100.0 mm ×70.0 mm

Weight

145 g

98 g

1.2 Device Specifications

1.2.1 Specifications summary

Table 1.1 shows the specfications of the disk drives (MHJ Series and MHK Series).

Table 1.1 Specifications (1/2)

MHK2120AT MHK2090AT

512

3 2

*1: Capacity under the LBA mode.

1-4 C141-E088-01EN

Model

Formatted Capacity

No. of Cylinder

No. of Heads

No. of Sectors

8,455.20 MB

16,383

8,455.20 MB

16,383

8,455.20 MB

16,383

6,007.35 MB

12,416

Model Name

Capacity

(user area)

Mounting screw

Order No.

18.1 GB

M3, depth 3

CA05365-B060

12.0 GB

M3, depth 3

CA05366-B040

9.0 GB

M3, depth 3

CA05366-B030

6.0 GB

M3, depth 3

CA05366-B020

+5 V

Maximum

100 mV (peak to peak)

Frequency

DC to 1 MHz

1.3 Power Requirements

Under the CHS mode (normal BIOS specification), formatted capacity, number of cylinders, number of heads, and number of sectors are as follows.

Table 1.1 Specifications (2/2)

MHJ2181AT MHK2120AT MHK2090AT MHK2060AT

1.2.2 Model and product number

Table 1.2 lists the model names and product numbers of the MHJ Series and MHK Series.

Table 1.2 Model names and product numbers

MHJ2181AT MHK2120AT MHK2090AT

16 63 16 63 16 63 15 63

MHK2060AT

1.3 Power Requirements

(1) Input Voltage

• + 5 V ± 5 %

(2) Ripple

C141-E088-01EN 1-5

Device Overview

Typical RMS Current

Typical Power (*3)

MHJ Series

MHK Series

MHJ Series

MHK Series

Spin up (*1)

0.9 A

4.5 W

Idle

170 mA

0.85 W

R/W (on track) (*2)

460 mA

2.3 W

Seek (*5)

460 mA

2.3 W

Standby

56 mA

0.28 W

Sleep

20 mA

0.1 W

Energy

Consumption

Efficiency (*4)

0.047 W/GB

0.071 W/GB

(3) Current Requirements and Power Dissipation

Table 1.3 lists the current and power dissipation.

Table 1.3 Current and power dissipation

— —

*1 Current at starting spindle motor.

*2 At 30% disk accessing.

*3 Power requirements reflect nominal values for +5V power.

*4 Energy Consumption Efficiency =

Idle power dissipation / Total record capacity (GB)

*5 The seek average current is specified based on three operations per 100

msec.

(4) Current fluctuation (Typ.) at +5V when power is turned on

1-6 C141-E088-01EN

Figure 1.1 Current fluctuation (Typ.) at +5V when power is turned on

(5) Power on/off sequence

Item

Specification

Temperature

• Operating

• Non-operating

• Thermal Gradient

5°C to 55°C (ambient)

5°C to 60°C (disk enclosure surface)

40°C to 6

20°C/h or less

Humidity

• Operating

• Non-operating

• Maximum Wet Bulb

8% to 90% RH (Non-condensing)

5% to 95% RH (Non-condensing)

29°C (Operating)

40°C (Non-operating)

Altitude (relative to sea level)

• Operating

• Non-operating

300 to 3,000 m

300 to 12,000 m

The voltage detector circuits (the MHJ Series and MHK Series) monitor +5 V. The circuits do not allow a write signal if either voltage is abnormal. These prevent data from being destroyed and eliminates the need to be concerned with the power on/off sequence.

1.4 Environmental Specifications

Table 1.4 lists the environmental specifications.

Table 1.4 Environmental specifications

1.4 Environmental Specifications

–

– –

5°C

C141-E088-01EN 1-7

Device Overview

Item

Specification

Sound Pressure

• Idle mode (DRIVE READY)

30 dBA typical at 1 m

Item

Specification

Vibration (swept sine, one octave per minute)

• Operating

• Non-operating

5 to 500 Hz, 1.0G 0-peak (MHJ series)

5 to 400 Hz, 1.0G 0-peak (MHK series)

(without non-recovered errors) (9.8 m/s

0-peak)

5 to 500 Hz, 5G 0-peak (MHJ series)

5 to 400 Hz, 5G 0-peak (MHK series)

(no damage) (49 m/s

0-peak)

Shock (half-sine pulse)

• Operating

• Non-operating

150G 0-peak (1,470 m/s

0-peak)

2 ms duration (without non-recovered errors)

700G 0-peak (6,860 m/s

0-peak)

1 ms duration (no damage)

120G 0-peak (1,176 m/s

0-peak)

11 ms duration (no damage)

1.5 Acoustic Noise

Table 1.5 lists the acoustic noise specification.

Table 1.5 Acoustic noise specification

Note:

Measure the noise from the cover top surface.

1.6 Shock and Vibration

Table 1.6 lists the shock and vibration specification.

Table 1.6 Shock and vibration specification

1-8 C141-E088-01EN

1.7 Reliability

Conditions of 300,000 h

Power-on time

250H/month or less 3000H/years

or less

Operating time

20% or less of power-on time

CSS operations

50/day or less

Total 50,000 or less

Power on/off

1/day or more needed.

Environment

5 to 55°C/8 to 90%

But humidity bulb temperature

29°C or less

(1) Mean time between failures (MTBF)

MTBF is defined as follows:

Total operation time in all fields

MTBF= (H)

number of device failure in all fields (*1)

1.7 Reliability

*1 “Disk drive defects” refers to defects that involve repair, readjustment, or

replacement. Disk drive defects do not include failures caused by external factors, such as damage caused by handling, inappropriate operating environments, defects in the power supply host system, or interface cable.

(2) Mean time to repair (MTTR)

The mean time to repair (MTTR) is 30 minutes or less, if repaired by a specialist maintenance staff member.

(3) Service life

In situations where management and handling are correct, the disk drive requires no overhaul for five years when the DE surface temperature is less than 48°C. When the DE surface temperature exceeds 48°C, the disk drives requires no overhaul for five years or 20,000 hours of operation, whichever occurs first. Refer to item (3) in Subsection 3.2 for the measurement point of the DE surface temperature. Also the operating conditions except the environment temperature are based on the MTBF conditions.

(4) Data assurance in the event of power failure

Except for the data block being written to, the data on the disk media is assured in the event of any power supply abnormalities. This does not include power supply abnormalities during disk media initialization (formatting) or processing of defects (alternative block assignment).

C141-E088-01EN 1-9

+ 197 hidden pages