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5.4 Command Protocol
C141-E104-02EN 5-87
Note that the host does not need to read the Status register for the
reading of a single sector or the last sector in multiple-sector
reading. If the timing to read the Status register does not meet
above condition, normal data transfer operation is not guaranteed.
When the host new command even if the device requests the data
transfer (setting in DRQ bit), the correct device operation is not
guaranteed.
Figure 5.4 Protocol for command abort
5.4.2 Data transferring commands from host to device
The execution of the following commands involves Data transfer from the host to
the drive.
• WRITE SECTOR(S)
• WRITE LONG
• WRITE BUFFER
• WRITE VERIFY
• SECURITY DISABLE PASSWORD
• SECURITY ERASE UNIT
• SECURITY SET PASSWORD
• SECURITY UNCLOK
The execution of these commands includes the transfer one or more sectors of
data from the host to the device. In the WRITE LONG command, 516 bytes are
transferred. Following shows the protocol outline.
- MHL2300AT, MHM2200AT 1
- MHM2150AT, MHM2100AT 1
- DISK DRIVES 1
- PRODUCT MANUAL 1
- FOR SAFE OPERATION 2
- Revision History 4
- Overview of Manual 6
- Operating Environment 7
- Attention 7
- Liability Exception 8
- Important Alert Items 10
- Manual Organization 12
- Contents 14
- Illustrations 19
- CHAPTER 1 Device Overview 22
- 1.1 Features 23
- 1.1.3 Interface 24
- 1.2 Device Specifications 25
- 1.3 Power Requirements 26
- 1.5 Acoustic Noise 29
- 1.6 Shock and Vibration 29
- 1.7 Reliability 30
- 1.8 Error Rate 31
- 1.9 Media Defects 31
- C141-E104-02EN 2-1 32
- 2.1 Device Configuration 32
- 2.2 System Configuration 32
- 3.1 Dimensions 39
- 3.1 Dimensions 40
- C141-E104-02EN 3-3 40
- 3.2 Mounting 41
- 3.2 Mounting 46
- C141-E104-02EN 3-9 46
- Figure 3.7 Handling cautions 46
- 3.3 Cable Connections 47
- 3.3.3 Device connection 48
- 3.4 Jumper Settings 49
- 3.4.2 Factory default setting 50
- 3.4.4 CSEL setting 51
- 3.4 Jumper Settings 52
- C141-E104-02EN 3-15 52
- 4.1 Outline 55
- 4.2 Subassemblies 55
- 4.2.3 Spindle 56
- 4.2.4 Actuator 56
- 4.2.5 Air filter 56
- 4.3 Circuit Configuration 57
- Theory of Device Operation 59
- 4-6 C141-E104-02EN 59
- 4.4 Power-on Sequence 60
- 4.5 Self-calibration 61
- • The power is turned on 62
- 4.6 Read/write Circuit 63
- 4.6.2 Write circuit 64
- 4-12 C141-E104-02EN 65
- 4.6.3 Read circuit 66
- 4.6.4 Digital PLL circuit 67
- 4.7 Servo Control 68
- 4.7.3 Servo frame format 73
- 4.7.4 Actuator motor control 74
- 4.7.5 Spindle motor control 75
- CHAPTER 5 Interface 78
- 5.1 Physical Interface 79
- − assertion of RESET- signal 81
- 5.2 Logical Interface 83
- 5.2.1 I/O registers 84
- 5.2.2 Command block registers 85
- 5.3 Host Commands 90
- 5.3.2 Command descriptions 93
- Password information 124
- (CM) 11110100 132
- • Data format version number 146
- • Attribute ID 146
- • Current attribute value 147
- • Raw attribute value 147
- • Self test execution status 147
- • Error logging capability 148
- • Check sum 149
- • Error data 150
- • Status 150
- • Self test log 1 to 21 151
- • Self test index 151
- • SECURITY SET PASSWORD 155
- • SECURITY UNLOCK 155
- • SECURITY DISABLE PASSWORD 155
- • SECURITY ERASE UNIT 155
- 5.3.3 Error posting 160
- Interface 161
- 5-84 C141-E104-02EN 161
- 5.4 Command Protocol 162
- IMPORTANT 163
- 5.4.4 Other commands 167
- 5.5 Ultra DMA Feature Set 169
- 5.5.2 Phases of operation 170
- 5.6 Timing 184
- 5-108 C141-E104-02EN 185
- 5.6 Timing 186
- C141-E104-02EN 5-109 186
- C141-E104-02EN 5-111 188
- 5-112 C141-E104-02EN 189
- 5.6.4 Power-on and reset 199
- CHAPTER 6 Operations 200
- 6.1.1 Response to power-on 201
- C141-E104-02EN 6-3 202
- 6.2 Address Translation 206
- 6.2.2 Logical address 207
- 6.3 Power Save 208
- 6.4 Defect Management 210
- 6.4.1 Spare area 211
- 1234567 505 506 212
- 1234567 505 506(unused) 212
- 6.5 Read-Ahead Cache 213
- • READ SECTOR (S) 214
- 6.5.3 Usage of read segment 215
- 6.6 Write Cache 221
- Glossary 224
- Acronyms and Abbreviations 228
- Comment Form 230
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