Fujitsu MHW2120BS User Manual Page 145
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5.3 Host Commands
• Current Span under test
As the self-test progress, the device shall modify this value to contain the test span
number currently being tested.
• Feature Flags
Table 5.23 Selective self-test feature flags
Bit Description
0 Vendor specific (unused)
1 When set to one, perform off-line scan after selective test
2 Vendor specific (unused)
3 When set to one, off-line scan after selective test is pending.
4 When set to one, off-line scan after selective test is active.
5...15 Reserved
Bit [l] shall be written by the host and returned unmodified by the device. Bit [3:4]
shall be written as zeros by the host and the device shall modify them as the test
progress.
• Selective Self-test pending time [min]
The selective self-test pending time is the time in minutes from power-on to the
resumption of the off-line testing if the pending bit is set.
C141-E249 5-71
- FOR SAFE OPERATION 2
- Revision History 3
- Preface 5
- Operating Environment 6
- Conventions 6
- Attention 7
- Liability Exception 7
- Important Alert Items 9
- Manual Organization 11
- Contents 13
- Illustrations 19
- CHAPTER 1 Device Overview 23
- 1.1 Features 24
- 1.1.3 Interface 25
- 1.2 Device Specifications 26
- • + 5 V ± 5 % 28
- 1.5 Acoustic Noise 32
- 1.6 Shock and Vibration 32
- 1.7 Reliability 33
- 1.8 Error Rate 34
- 1.9 Media Defects 34
- 1.10 Load/Unload Function 34
- 2.1 Device Configuration 40
- 2.2 System Configuration 41
- 3.1 Dimensions 44
- •m (5kgf•cm) 45
- Mounting screw hole 49
- Cable connection 49
- 3.3.1 Device connector 51
- 4.1 Outline 56
- 4.2 Subassemblies 56
- 4.3 Circuit Configuration 57
- C141-E249 4-5 59
- 4.4 Power-on Sequence 60
- Power-on 61
- 4.5 Self-calibration 62
- 4.6 Read/write Circuit 64
- 4.6.3 Read circuit 65
- 4.6.4 Digital PLL circuit 66
- 4.7 Servo Control 67
- Diameter 70
- 4.7.3 Servo frame format 71
- Theory of Device Operation 72
- (2) Seek operation 72
- 4.7.5 Spindle motor control 73
- CHAPTER 5 Interface 75
- 5.1 Physical Interface 76
- COMRESET/COMINIT 78
- 106.7 ns 78
- 106.7 ns 106.7 ns 78
- 5.1.4 Connector pinouts 84
- 5.1.5 P11 function 85
- 5-12 C141-E249 86
- 5.1.6 Hot Plug 87
- 5.2 Logical Interface 88
- 5.2.1 Communication layers 89
- 5.3 Host Commands 103
- Interface 104
- 5-30 C141-E249 104
- 5.3.2 Command descriptions 106
- Word Value Content 162
- 5-88 C141-E249 162
- C141-E249 5-89 163
- 5.3 Host Commands 163
- C141-E249 5-91 165
- (23) READ BUFFER (X’E4’) 175
- (24) FLUSH CACHE (X’E7’) 176
- (25) WRITE BUFFER (X’E8’) 177
- Bit 0: Reserved 186
- Setup FIS 186
- × 2 minutes 190
- (28) SET FEATURES (X’EF’) 193
- → Low Power Idle 197
- 01h (*1) 198
- (36) SET MAX (X’F9’) 211
- • SET MAX ADDRESS 211
- • Description 217
- (38) READ DMA EXT (X’25’) 218
- Sector offset (7-0) 222
- (43) WRITE DMA EXT (X’35’) 228
- 5.3.3 Error posting 242
- 5.4 Command Protocol 245
- C141-E249 5-173 247
- • WRITE DMA (EXT) (FUA EXT) 250
- C141-E249 5-179 253
- 5-180 C141-E249 254
- C141-E249 5-181 255
- This page is intentionally 256
- blank 256
- CHAPTER 6 Operations 257
- 6.1 Reset and Diagnosis 258
- 6.1 Reset and Diagnosis 259
- earlier than the host) 259
- C141-E249 6-3 259
- 6.1.2 Response to COMRESET 260
- 6.2 Power Save 264
- 6.2.2 Power commands 266
- • READ SECTOR (s) (EXT) 269
- • READ MULTIPLE (EXT) 269
- • READ DMA (EXT) 269
- • READ FP DMA QUEUED 269
- 6.4.2 Caching operation 270
- 273
- Cache valid data 275
- START LBA 275
- LAST LBA 275
- 6.5 Write Cache 276
- IMPORTANT 277
- Glossary 279
- Acronyms and Abbreviations 283
- Comment Form 291
- DISK DRIVES PRODUCT MANUAL 293
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