Fujitsu MHE2064AT User Manual Page 23
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Device Overview
1-2 C141-E057-02EN
1.1 Features
1.1.1 Functions and performance
The fillowing features of the MHE Series and MHF Series are described.
(1) Compact
The MHE2064AT and MHE2043AT have 3 disks, and its height is 12.5 mm
(0.492 inch). The MHF2043AT and MHF2021AT have 1 disk or 2 disks of 65
mm (2.5 inches) diameter, and its height is 9.5 mm (0.374 inch).
(2) Large capacity
The disk drive can record up to 2.16 GB (formatted) on one disk using the (16/17)
EPR4ML recording method and 14 recording zone technology. The MHE Series
and MHF Series
have a formatted capacity of 6.49 GB (MHE2064AT), 4.32 GB
(MHE2043AT), 4.32 GB (MHF2043AT), 2.16 GB (MHF2021AT) respectively.
(3) High-speed Transfer rate
The disk drives (the MHE Series and MHF Series) have an internal data rate up to
13.6 MB/s. The disk drive supports an external data rate up to 33.3 MB/s (U-
DMA mode 2).
(4) Average positioning time
Use of a rotary voice coil motor in the head positioning mechanism greatly
increases the positioning speed. The average positioning time is 13 ms (at read).
1.1.2 Adaptability
(1) Power save mode
The power save mode feature for idle operation, stand by and sleep modes makes
The disk drives (the MHE Series and MHF Series) ideal for applications where
power consumption is a factor.
(2) Wide temperature range
The disk drives (the MHE Series and MHF Series) can be used over a wide
temperature range (5°C to 55°C).
(3) Low noise and vibration
In Ready status, the noise of the disk drives (the MHE Series and MHF Series) is
only about 30 dBA (measured at 1 m apart from the drive under the idle mode).
- 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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