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Track format, At the cylinder switching location, like the head switching location

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5.99 msec Servo frame n = 305 (zone 0) ~ 494 (zone 17) Figure 3.4 Track format (2) Track skew and cylinder skew To avoid waiting for one turn involved in head and cylinder switching, the first logical data block in each track is shifted by the number of sectors (track skew and cylinder skew) corresponding to the switching time. Figure 3.5 shows how the data block is allocated in each track. At the head switching location in a cylinder, the first logical data block in track t + 1 is allocated at the sector position which locates the track skew behind the sector position of the last logical data block sector in track t. At the cylinder switching location, like the head switching location, the first logical data block in a cylinder is allocated at the sector position which locates the cylinder skew behind the last logical sector position in the preceding cylinder. The last logical sector in the cylinder is allocated when formatting, and is an unused spare sector. 3 - 6 C141-E128-01EN

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
REVISION RECORD	3
PREFACE	5
Important Alert Items	8
CONTENTS	11
FIGURES	15
TABLES	17
CHAPTER 1 GENERAL DESCRIPTION	19
1.1 Standard Features	20
1.2 Hardware Structure	23
1.3 System Configuration	26
CHAPTER 2 SPECIFICATIONS	29
2.1 Hardware Specifications	29
2.1.1 Model name and part number	29
2.1.2 Function specifications	30
2.1.3 Environmental specifications	32
2.1.4 Error rate	33
2.1.5 Reliability	33
2.2 SCSI Function Specifications	35
CHAPTER 3 DATA FORMAT	37
3.1 Data Space	37
3.1.1 Cylinder configuration	37
3.1.2 Alternate spare area	40
3.1.3 Track format	41
3.1.4 Sector format	43
3.1.5 Format capacity	45
3.2 Logical Data Block Addressing	46
3.3 Defect Management	47
3.3.1 Defect list	47
3.3.2 Alternate block allocation	47
CHAPTER 4 INSTALLATION REQUIREMENTS	53
4.1 Mounting Requirements	53
4.1.1 External dimensions	53
4.1.2 Mounting	56
4.1.3 Notes on mounting	56
4.2 Power Supply Requirements	60
4.3 Connection Requirements	63
4.3.1 68 pin connector 16-bit SCSI model (MP model)	63
4.3.2 SCA2 type SCSI model (MC model)	71
4.3.3 Cable connector requirements	72
4.3.4 External operator panel (MP model)	74
CHAPTER 5 INSTALLATION	75
5.1 Notes on Handling Drives	75
5.2 Connections	77
5.3 Setting Terminals	79
5.3.1 SCSI ID setting (MP model only)	80
5.3.2 Each mode setting (MP model only)	81
5.3.3 Mode settings	83
5.4 Mounting Drives	84
5.4.1 Check before mounting	84
5.4.2 Mounting procedures	84
5.5 Connecting Cables	85
5.6 Confirming Operations after Installation and Preparation for use	86
5.6.1 Confirming initial operations	86
5.6.2 Checking SCSI connection	87
5.6.3 Formatting	90
5.6.4 Setting parameters	92
5.7 Dismounting Drives	96
5.8 Spare Disk Drive	96
CHAPTER 6 DIAGNOSTICS AND MAINTENANCE	97
6.1 Diagnostics	97
6.1.1 Self-diagnostics	97
6.1.2 Test programs	100
6.2 Maintenance Information	101
6.2.1 Precautions	101
6.2.2 Maintenance requirements	102
6.2.3 Maintenance levels	104
6.2.4 Revision numbers	105
6.2.5 Tools and test equipment	106
6.2.6 Tests	106
6.3 Operation Check	108
6.3.1 Initial seek operation check	108
6.3.2 Operation test	108
6.3.3 Diagnostic test	108
6.4 Troubleshooting Procedures	109
6.4.1 Outline of troubleshooting procedures	109
6.4.2 Troubleshooting with disk drive replacement in the field	109
6.4.3 Troubleshooting at the repair site	111
6.4.4 Troubleshooting with parts replacement in the factory	112
6.4.5 Finding possibly faulty parts	112
CHAPTER 7 ERROR ANALYSIS	113
7.1 Error Analysis Information Collection	113
7.1.1 Sense data	113
7.1.2 Sense key, sense code, and subsense code	113
7.2 Sense Data Analysis	115
7.2.1 Error information indicated with sense data	115
7.2.2 Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)	116
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error	116
7.2.4 Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00), (B-4D-xx) and (B-4E-00): SCSI interface error	116
CHAPTER 8 PRINCIPLE OF OPERATION	117
8.1 Outline	117
8.2 Disk Drive Configuration	117
8.2.1 Disks	118
8.2.2 Heads	118
8.2.3 Spindle mechanism	118
8.2.4 Actuator	118
8.2.5 Air filters	118
8.3 Circuit Configuration	119
8.4 Power-On Sequence	121
8.5 Factory-Calibration	122
8.6 Read/Write Circuit	123
8.6.1 Head IC	123
8.6.2 Write circuit	123
8.6.3 Read circuit	125
8.7 Servo Control	125
8.7.1 Servo control circuit	125
8.7.2 Servo format	126
8.7.3 Servo frame format	128
8.7.4 Spindle motor control	128
8.7.5 Voice coil motor control	129
APPENDIX A LOCATIONS OF CONNECTORS AND SETTING TERMINALS	131
A.1 Locations of Connectors (MAN series MC model)	132
A.2 Locations of Connectors and Setting Terminals (MAN series MP model)	133
APPENDIX B SETTING TERMINALS	135
B.1 Setting Terminals (MP model only)	136
APPENDIX C CONNECTOR SIGNAL ALLOCATION	137
C.1 SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI	138
C.2 SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI	139
APPENDIX D MODEL NAMES AND PRODUCT NUMBERS	141

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C141-E128-01EN

3 - 6

n = 305 (zone 0) ~ 494 (zone 17)

5.99 msec

Servo frame

Figure 3.4

Track format

(2)

Track skew and cylinder skew

To avoid waiting for one turn involved in head and cylinder switching, the first logical data block

in each track is shifted by the number of sectors (track skew and cylinder skew) corresponding to

the switching time.

Figure 3.5 shows how the data block is allocated in each track.

At the head switching location in a cylinder, the first logical data block in track t + 1 is allocated at

the sector position which locates the track skew behind the sector position of the last logical data

block sector in track t.

At the cylinder switching location, like the head switching location, the first logical data block in a

cylinder is allocated at the sector position which locates the cylinder skew behind the last logical

sector position in the preceding cylinder.

The last logical sector in the cylinder is allocated when

formatting, and is an unused spare sector.