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5.3 Host Commands
C141-E104-02EN 5-51
At command issuance (I/O registers setting contents)
1F7
H
(CM)11111000
1F6
H
(DH) x L x DV xx
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(FR)
xx
xx
xx
xx
xx
At command completion (I/O registers contents to be read)
1F7
H
(ST) Status information
1F6
H
(DH) x x x DV Max head/LBA [MSB]
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(ER)
Max. cylinder [MSB]/Max. LBA
Max. cylinder [LSB]/Max. LBA
Max. sector/Max. LBA [LSB]
xx
Error information
(18) EXECUTE DEVICE DIAGNOSTIC (X’90’)
This command performs an internal diagnostic test (self-diagnosis) of the device.
This command usually sets the DRV bit of the Drive/Head register is to 0
(however, the DV bit is not checked). If two devices are present, both devices
execute self-diagnosis.
If device 1 is present:
• Both devices shall execute self-diagnosis.
• The device 0 waits for up to 5 seconds until device 1 asserts the PDIAG-
signal.
• If the device 1 does not assert the PDIAG- signal but indicates an error, the
device 0 shall append X’80’ to its own diagnostic status.
• The device 0 clears the BSY bit of the Status register and generates an
interrupt. (The device 1 does not generate an interrupt.)
•
A diagnostic status of the device 0 is read by the host system. When a
diagnostic failure of the device 1 is detected, the host system can read a status
of the device 1 by setting the DV bit (selecting the device 1).
- 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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