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142 Appendix B
SCSI Connections
Appendix Overview
Appendix Overview
This appendix contains the following main sections:
• SCSI Bus Differences
• SCSI Restrictions
• SCSI Bus Length Constraints
• Assigning SCSI Device IDs
• Connecting to the SCSI Ports
NOTE
When attaching external SCSI devices, be sure to terminate the last device on
the external SCSI bus. The J6000 does note require external SCSI
termination if no external SCSI devices are connected.
SCSI Bus Differences
A SCSI (Small Computer Systems Interface) bus is an IEEE standard bus for connecting a
workstation to internal and external SCSI devices running at different speeds. There may
be one device connected to the external SCSI port, or several SCSI devices may be
daisy-chained together and connected to the external SCSI port. Examples of these SCSI
devices are 4 mm DDS-format tape drives, CD ROM drives, and hard disk drives.
The J6000 has a single dedicated external SCSI bus which supports both low voltage
differential SCSI (LVD) and single-ended SCSI. The J6000 will also support wide (68 pin)
or narrow (50 pin via a 68-50 pin adapter cable) SCSI. The following table shows the
specification differences between these SCSI buses.
NOTE
Do not mix SE and LVD SCSI devices on the same SCSI bus as this can cause
reduction in device performance.
Table B-1. SCSI Bus Differences
SCSI Type Transfer Rate Data Bus
Width
Maximum
Addresses
1
1. Address 7 is reserved for host controller use on all SCSI buses.
Maximum
Cable
Length
SE/LVD Up to 20 MB/sec 8 bits 0 through 6 3.0 meters
(9.84 feet)
VWSE Up to 40 MB/sec. 16 bits 0 through 6;
8 through 15
3.0 meters
(9.84 feet)
LVD Up to 80 MB/sec 16 bits 0 through 6;
8 through 15
12 meters
(39.37 feet)
- Service Handbook 1
- Restricted Rights Legend 2
- Contents 3
- 1 Product Information 9
- Chapter Overview 10
- Product Description 10
- Key Features 12
- Chapter 1 13 13
- Product Information 13
- Front Panel Components 14
- Thumbscrew on the Front Panel 15
- System LCD 15
- Internal Storage Devices 16
- Chapter 1 17 17
- Chapter 1 19 19
- 20 Chapter1 20
- Enter: hpux -lq 20
- Chapter 1 21 21
- Rear Panel Components 23
- Connectors on the Rear Panel 24
- Line Input 25
- Line Output 25
- Headphone Microphone 25
- Memory Slots 27
- 28 Chapter1 28
- Internal Components 28
- Monitors 29
- Keyboard 29
- 30 Chapter1 30
- 2 Configuration 31
- Workstation Configurations 32
- Chapter 2 33 33
- Configuration 33
- I/O Cards 34
- 3 Troubleshooting 35
- Chapter 3 37 37
- Troubleshooting 37
- 38 Chapter3 38
- Chapter 3 39 39
- 40 Chapter3 40
- Dealing with a Boot Failure 41
- Stable Storage 42
- Boot Command Notations 42
- Supported Boot Paths 43
- Selftest Failures 44
- Memory Failures 45
- Chassis Codes 46
- Chapter 3 69 69
- Running ODE-Based Diagnostics 70
- 76 Chapter3 76
- Tools Required 79
- 80 Chapter4 80
- Exploded View Diagram 80
- Chapter 4 85 85
- Front Bezel and Top Cover 86
- Chapter 4 87 87
- Removing the LCD Panel 88
- Chapter 4 89 89
- 90 Chapter4 90
- Internal CD ROM Drive 91
- Power Supply 92
- Chapter 4 93 93
- PCI Cage 94
- 1. Disconnect fan power plug 95
- 2. Remove mounting screw 95
- Removing the System Board 96
- Chapter 4 97 97
- Replacing the System Board 98
- Chapter 4 99 99
- 100 Chapter4 100
- FRU Removal and Replacement 100
- 5 Boot Console Handler 101
- Boot Console Handler Features 103
- Boot Console Menus 105
- Boot Console Handler 106
- 106 Chapter5 106
- Chapter 5 107 107
- 108 Chapter5 108
- Booting the Workstation 109
- 110 Chapter5 110
- Searching for Bootable Media 111
- Resetting the Workstation 112
- Displaying and Setting Paths 113
- The Monitor Command 115
- Setting the Monitor Type 116
- Chapter 5 119 119
- 120 Chapter5 120
- Chapter 5 121 121
- 122 Chapter5 122
- 126 Chapter5 126
- Displaying System Information 127
- Displaying PIM Information 127
- Using Remote Power-On 128
- Setting the Fan Speed 130
- Chapter 5 131 131
- ISL User Commands 133
- 134 Chapter5 134
- 6 Block Diagram 135
- System Board and PCI Board 136
- A Specifications 137
- Environmental Specifications 138
- Vibration 139
- Electrical Specifications 140
- B SCSI Connections 141
- Appendix Overview 142
- SCSI Restrictions 143
- 144 Appendix B 144
- SCSI Connections 144
- Assigning SCSI Device IDs 145
- 146 Appendix B 146
- C Related Documentation 147
- Additional Documentation 148
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