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Fujitsu MHE2064AT User Manual Page 64
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4.6 Read/write Circuit
C141-E057-01EN
4-
11
Figure 4.4
Read/write circuit block diagram
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MHE2064AT, MHE2043AT
1
MHF2043AT, MHF2021AT
1
DISK DRIVE
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
27
1.5 Acoustic Noise
30
1.6 Shock and Vibration
30
1.7 Reliability
31
1.8 Error Rate
32
1.9 Media Defects
32
C141-E057-01EN 2-1
34
2.1 Device Configuration
34
2.2 System Configuration
34
3.1 Dimensions
41
3.1 Dimensions
42
C141-E057-01EN 3-3
42
3.2 Mounting
43
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-E057-01EN 3-13
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
4.3 Circuit Configuration
58
C141-E057-01EN 4-5
58
4.4 Power-on Sequence
59
4.5 Self-calibration
60
• The power is turned on
61
4.6 Read/write Circuit
62
4.6.2 Write circuit
63
4.6 Read/write Circuit
64
C141-E057-01EN 4-11
64
4.6.3 Read circuit
65
4.6.4 Digital PLL circuit
66
4.7 Servo Control
67
Servo frame
69
(60 servo frames
69
4.7.3 Servo frame format
71
4.7.4 Actuator motor control
72
4.7.5 Spindle motor control
73
CHAPTER 5 Interface
76
5.1 Physical Interface
77
5.2 Logical Interface
81
5.2.1 I/O registers
82
5.2.2 Command block registers
83
5.3 Host Commands
88
5.3.2 Command descriptions
91
→ with Retry
96
→ without Retry
96
(CM) 1 1 1 1 0 1 0 0
124
• Data format version number
135
• Attribute ID
135
• Status Flag
136
• Current attribute value
136
• Raw attribute value
136
• Current segment pointer
137
• Check sum
138
• Insurance failure threshold
138
• SECURITY SET PASSWORD
141
• SECURITY UNLOCK
141
• SECURITY DISABLE PASSWORD
141
• SECURITY ERASE UNIT
141
5.3.3 Error posting
146
5.4 Command Protocol
148
5.4.4 Other commands
153
5.5 Ultra DMA Feature Set
155
5.5.2 Phases of operation
156
5.6 Timing
170
Interface
171
5-96 C141-E057-01EN
171
5.6 Timing
172
C141-E057-01EN 5-97
172
5-98 C141-E057-01EN
173
5.6.5 Power-on and reset
186
CHAPTER 6 Operations
188
6.1.1 Response to power-on
189
C141-E057-01EN 6-3
190
6 seconds
193
6.2 Address Translation
194
6.2.2 Logical address
195
6.3 Power Save
196
6.4 Defect Management
198
6.4.1 Spare area
199
6.5 Read-Ahead Cache
201
− WRITE SECTOR(S)
202
− WRITE DMA
202
− WRITE MULTIPLE
202
− READ SECTOR (S)
202
− READ DMA
202
6.5.3 Usage of read segment
203
Empty areaMis-hit data
205
Start LBALast LBA
205
Read-ahead data
205
Start LBA
208
Last LBA
208
6.6 Write Cache
209
• WRITE SECTOR(S)
210
• WRITE MULTIPLE
210
• WRITE DMA
210
Glossary
212
Acronyms and Abbreviations
216
Comment Form
223
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