Fujitsu MHL2300AT, MHM200AT, MHM2100AT, MHM215OAT !", , # #

4.7 Servo Control

C141-E104-02EN 4-19

Figure 4.8 Physical sector servo configuration on disk surface

W/R Recovery

Servo Mark

Gray Code

W/R Recovery

Servo Mark

Gray Code

W/R Recovery

Servo Mark

Gray Code

Erase Servo A Erase Servo A

Servo B Erase Servo B Erase

Servo C Erase Servo C

Erase Servo D Erase

PAD

CYLn + 1 CYLn CYLn – 1 (n: even number)

Diameter

direction

Circumference

Direction

Erase: DC erase

area

OGB

Data area

IGB

expand

Servo frame

(66 servo frames per revolution)

Contents

Main FOR SAFE OPERATION Page Revision History Page Preface Overview of Manual Conventions for Alert Messages Operating Environment Attention Page Page Important Alert Items Important Alert Messages Page Manual Organization Page Contents CHAPTER 1 Device Overview....................................................................... 1-1 CHAPTER 2 Device Configuration................................................................ 2-1 CHAPTER 3 Installation Conditions..............................................................3-1 CHAPTER 4 Theory of Device Operation......................................................4-1 Page Page Page Illustrations Figures Tables Page CHAPTER 1 Device Overview 1.1 Features 1.1.1 Functions and performance 1.1.2 Adaptability 1.1.3 Interface Device Overview 1-4 C141-E104-02EN 1.2 Device Specifications 1.2.1 Specifications summary 1.2.2 Model and product number 1.3 Power Requirements Page 1.4 Environmental Specifications 1.5 Acoustic Noise 1.6 Shock and Vibration 1.7 Reliability 1.8 Error Rate 1.9 Media Defects Page 2.1 Device Configuration Page 2.2 System Configuration 2.2.1 ATA interface 2.2.2 1 drive connection 2.2.3 2 drives connection Page Page Page Page Page 3.2 Mounting Page Page Page Page 3.2 Mounting C141-E104-02EN 3-9 Figure 3.7 Handling cautions 3.3 Cable Connections 3.3.1 Device connector 3.3.2 Cable connector specifications 3.3.3 Device connection 3.4 Jumper Settings 3.4.2 Factory default setting 3.4.3 Master drive-slave drive setting 3.4.4 CSEL setting Page Page CHAPTER 4 Theory of Device Operation 4.1 Outline 4.2 Subassemblies 4.2.1 Disk 4.2.2 Head 4.2.3 Spindle 4.2.4 Actuator 4.2.5 Air filter 4.3 Circuit Configuration Page Theory of Device Operation HDIC 4-6 C141-E104-02EN Figure 4.3 Circuit Configuration Printed Circuit Board 4.4 Power-on Sequence 4.5 Self-calibration 4.5.1 Self-calibration contents 4.5.2 Execution timing of self-calibration 4.5.3 Command processing during self-calibration 4.6 Read/write Circuit 4.6.1 Read/write preamplifier (HDIC) 4.6.2 Write circuit Theory of Device Operation 4-12 C141-E104-02EN Figure 4.5 Read/write circuit block diagram 4.6.3 Read circuit 4.6.4 Digital PLL circuit 4.7 Servo Control 4.7.1 Servo control circuit Page Page 4.7.2 Data-surface servo format !" # # Page 4.7.4 Actuator motor control 4.7.5 Spindle motor control Page Page CHAPTER 5 Interface 5-2 C141-E104-02EN 5.1 Physical Interface IDD 5.1.1 Interface signals Figure 5.1 shows the interface signals. Figure 5.1 Interface signals 5.1.2 Signal assignment on the connector Page Page 5.2 Logical Interface 5.2.1 I/O registers 5.2.2 Command block registers Page Page Page Page 5.2.3 Control block registers 5.3 Host Commands 5.3.1 Command code and parameters Page 5.3.2 Command descriptions Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 5.3.3 Error posting 5-84 C141-E104-02EN Table 5.15 Command code and parameters (2 of 2) 5.4 Command Protocol 5.4.1 Data transferring commands from device to host Page 5.4.2 Data transferring commands from host to device Page 5.4.3 Commands without data transfer 5.4.4 Other commands 5.4.5 DMA data transfer commands Page 5.5 Ultra DMA Feature Set 5.5.1 Overview 5.5.2 Phases of operation Page 5.5.3 Ultra DMA data in commands Page Page Page Page 5.5.4 Ultra DMA data out commands Page Page Page Page Page 5.5.6 Series termination required for Ultra DMA Page Page Page 5-110 C141-E104-02EN 5.6.3 Transfer of Ultra DMA data C141-E104-02EN 5-111 5-112 C141-E104-02EN Table 5.18 Ultra DMA data burst timing requirements (2 of 2) Page Page C141-E104-02EN 5-115 5.6.3.5 Device terminating an Ultra DMA data in burst Note: The definitions for the STOP, HDMARDY- and DSTROBE signal Figure 5.15 Device terminating an Ultra DMA data in burst 5-116 C141-E104-02EN 5.6.3.6 Host terminating an Ultra DMA data in burst Note: The definitions for the STOP, HDMARDY- and DSTROBE signal Figure 5.16 Host terminating an Ultra DMA data in burst C141-E104-02EN 5-117 5.6.3.7 Initiating an Ultra DMA data out burst Page Page 5-120 C141-E104-02EN 5.6.3.10 Host terminating an Ultra DMA data out burst Figure 5.20 Host terminating an Ultra DMA data out burst C141-E104-02EN 5-121 5.6.3.11 Device terminating an Ultra DMA data in burst Figure 5.21 Device terminating an Ultra DMA data out burst 5.6.4 Power-on and reset Page 6.1 Device Response to the Reset 6.1.1 Response to power-on 6.1 Device Response to the Reset Figure 6.1 Response to power-on C141-E104-02EN 6-3 6.1.2 Response to hardware reset 6.1.3 Response to software reset 6.1.4 Response to diagnostic command 6.2 Address Translation 6.2.1 Default parameters 6.2.2 Logical address 6.3 Power Save 6.3.1 Power save mode Page 6.3.2 Power commands 6.4 Defect Management 6.4.1 Spare area 6.4.2 Alternating defective sectors Page 6.5 Read-Ahead Cache 6.5.1 Data buffer configuration 6.5.2 Caching operation Page 6.5.3 Usage of read segment Page Page Page Page Page 6.6 Write Cache Page Page Glossary Page Page Page Acronyms and Abbreviations Page Comment Form