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Setting parameters, IMPORTANT

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Installation 5.5.4 Setting parameters The user can specify the optimal operation mode for the user system environments by setting the following parameters with the MODE SELECT or MODE SELECT EXTENDED command: • Error recovery parameter • Disconnection/reconnection parameter • Caching parameter • Control mode parameter With the MODE SELECT or MODE SELECT EXTENDED command, specify 1 for the "SP" bit on CDB to save the specified parameter value on the disk. This enables the IDD to operate by using the parameter value set by the user when power is turned on again. When the system has more than one INIT, different parameter value can be set for each INIT. When the parameters are not set or saved with the MODE SELECT or MODE SELECT EXTENDED command, the IDD sets the default values for parameters and operates when power is turned on or after reset. Although the IDD operations are assured with the default values, the operations are not always optimal for the system. To obtain the best performance, set the parameters in consideration of the system requirements specific to the user. This section outlines the parameter setting procedures. Refer to Chapter 3 of Fibre Channel Interface Specifications for further details of the MODE SELECT and MODE SELECT EXTENDED commands and specifying the parameters. IMPORTANT 1. At factory shipment of the IDD, the saving operation for the MODE SELECT parameter is not executed. So, if the user does not set parameters, the IDD operates according to the default value of each parameter 2. The model select parameter is not saved for each Loop ID of but as the common parameter for all IDs. In the multi-INIT System, parameter setting cannot be changed for each INIT. 3. Once parameters are saved, the saved value is effective as long as next saving operation is executed from the INIT. For example, even if the initialization of the disk is performed by the FORMAT UNIT command, the saved value of parameters described in this section is not affected. 4. When the IDD, to which the saving operation has been executed on a system, is connected to another system, the user must pay attention to that the IDD operates according to the saved parameter value if the saving operation is not executed at installation. 5-12 C141-E133-02EN

Section	Page
Front Cover	1
FOR SAFE OPERATION	2
Revision History	5
Preface	7
Important Alert Items	11
MANUAL ORGANIZATION	13
REFERENCED STANDARDS	15
CONTENTS	17
CHAPTER 1 General Description	25
1.1 Standard Features	26
1.2 Hardware Structure	29
CHAPTER 2 Specifications	33
2.1 Hardware Specifications	33
2.1.1 Model name and part number	33
2.1.2 Function specifications	34
2.1.3 Environmental specifications	36
2.1.4 Error rate	37
2.1.5 Reliability	37
CHAPTER 3 Data Format	41
3.1 Data Space	41
3.1.1 Cylinder configuration	41
3.1.2 Alternate spare area	44
3.1.3 Track format	45
3.1.4 Sector format	47
3.1.5 Format capacity	49
3.2 Logical Data Block Addressing	50
3.3 Defect Management	51
3.3.1 Defect list	51
3.3.2 Alternate block allocation	51
CHAPTER 4 Installation Requirements	57
4.1 Mounting Requirements	57
4.1.1 External dimensions	57
4.1.2 Mounting	59
4.1.3 Notes on mounting	59
4.2 Power Supply Requirements	63
4.3 Connection Requirements	65
4.3.1 Connector	65
4.3.2 Interface connector	65
CHAPTER 5 Installation	67
5.1 Notes on Handling Drives	67
5.2 Setting	69
5.2.1 Loop ID setting	69
5.2.2 Mode settings	69
5.3 Mounting Drives	70
5.3.1 Mounting procedures	70
5.4 Dismounting Drives	71
5.5 Checking Operation after Installation and Preparing the IDD for Use	72
5.5.1 Checking initial operation	72
5.5.2 Checking connection	73
5.5.3 Formatting	76
5.5.4 Setting parameters	78
5.6 Spare Disk Drive	82
CHAPTER 6 Diagnostics and Maintenance	83
6.1 Diagnostics	83
6.1.1 Self-diagnostics	83
6.1.2 Test programs	86
6.2 Maintenance Information	87
6.2.1 Precautions	87
6.2.2 Maintenance requirements	88
6.2.3 Maintenance levels	90
6.2.4 Revision numbers	91
6.2.5 Tools and test equipment	92
6.2.6 Tests	92
6.3 Operation Check	94
6.3.1 Initial seek operation check	94
6.3.2 Operation test	94
6.3.3 Diagnostic test	94
6.4 Troubleshooting Procedures	95
6.4.1 Outline of troubleshooting procedures	95
6.4.2 Troubleshooting with disk drive replacement in the field	95
6.4.3 Troubleshooting at the repair site	97
6.4.4 Troubleshooting with parts replacement in the factory	98
6.4.5 Finding possibly faulty parts	98
CHAPTER 7 Error Analysis	99
7.1 Error Analysis Information Collection	99
7.1.1 Sense data	99
7.1.2 Sense key, sense code, and subsense code	99
7.2 Sense Data Analysis	101
7.2.1 Error information indicated with sense data	101
7.2.2 Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)	102
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error	102
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): fibre channel interface erro	102
CHAPTER 8 Principle of Operation	103
8.1 Outline	103
8.2 Disk Drive Configuration	103
8.2.1 Disks	104
8.2.2 Heads	104
8.2.3 Spindle mechanism	104
8.2.4 Actuator	104
8.2.5 Air filters	104
8.3 Circuit Configuration	105
8.4 Power-On Sequence	107
8.5 Factory-Calibration	108
8.6 Read/Write Circuit	109
8.6.1 Head IC	109
8.6.2 Write circuit	109
8.6.3 Read circuit	111
8.7 Servo Control	111
8.7.1 Servo control circuit	111
8.7.2 Servo format	112
8.7.3 Servo frame format	114
8.7.4 Spindle motor control	114
8.7.5 Voice coil motor control	115
APPENDIX A Locations of Connector	117
A.1 Locations of Connector	118
APPENDIX B Connector Signal Allocation	119
B.1 Interface (FC-SCA) Connector Signal Allocation	120
APPENDIX C Model Names and Product Numbers	121
C.1 Model Names and Product Numbers	122
APPENDIX D Fibre Channel Interface Functions	123
D.1 Fibre Channel Interface Function Specifications	124
Glossary	133
Acronyms and Abbreviations	137
Index	139
READER’S COMMENT FORM	143

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Installation

5-12

C141-E133-02EN

5.5.4

Setting parameters

The user can specify the optimal operation mode for the user system environments by setting the

following parameters with the MODE SELECT or MODE SELECT EXTENDED command:

•

Error recovery parameter

•

Disconnection/reconnection parameter

•

Caching parameter

•

Control mode parameter

With the MODE SELECT or MODE SELECT EXTENDED command, specify 1 for the "SP" bit on

CDB to save the specified parameter value on the disk.

This enables the IDD to operate by using the

parameter value set by the user when power is turned on again.

When the system has more than one

INIT, different parameter value can be set for each INIT.

When the parameters are not set or saved with the MODE SELECT or MODE SELECT

EXTENDED command, the IDD sets the default values for parameters and operates when power is

turned on or after reset.

Although the IDD operations are assured with the default values, the

operations are not always optimal for the system.

To obtain the best performance, set the parameters

in consideration of the system requirements specific to the user.

This section outlines the parameter setting procedures.

Refer to Chapter 3 of Fibre Channel Interface

Specifications for further details of the MODE SELECT and MODE SELECT EXTENDED

commands and specifying the parameters.

IMPORTANT

At factory shipment of the IDD, the saving operation for the MODE

SELECT parameter is not executed.

So, if the user does not set parameters,

the IDD operates according to the default value of each parameter

The model select parameter is not saved for each Loop ID of but as the

common parameter for all IDs.

In the multi-INIT System, parameter setting

cannot be changed for each INIT.

Once parameters are saved, the saved value is effective as long as next

saving operation is executed from the INIT.

For example, even if the

initialization of the disk is performed by the FORMAT UNIT command, the

saved value of parameters described in this section is not affected.

When the IDD, to which the saving operation has been executed on a

system, is connected to another system, the user must pay attention to that

the IDD operates according to the saved parameter value if the saving

operation is not executed at installation.