SCSI-2 Bus Termination Guidelines | HP A165890669 manual

Introduction

SCSI-2 Bus Termination Guidelines

There are certain guidelines to follow when terminating a SCSI-2 bus. These guidelines are:

CAUTION: Unless the SCSI-2 bus is properly terminated, the bus will not operate. Terminators provide impedance matching on SCSI-2 bus signal lines.

•The last device connected to the SCSI-2 bus must be terminated with a SCSI-2 terminator. Use a Hewlett-Packard K2291 50-pin low-density bail-lock active terminator or a Hewlett-Packard C2904A high-density thumbscrew active terminator to terminate the last SCSI-2 option device.

•Any termination on other devices on the bus must be removed. This includes external termination plugged into a SCSI-2 receptacle on the device, or internal resistor packs. (Refer to peripheral device or system configuration manuals for termination information).

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HP A165890669 manual SCSI-2 Bus Termination Guidelines

Contents

HP 4x Speed CD±ROM Disk Drive Users Guide 10 9 8 7 6 5 4 3 2 Contents Maintenance and Troubleshooting Using your CD±ROM Drive Appendix B Scsi Connector Pinout Appendix a Safety and Regulatory Statements Figures Audience Safety and Regulatory Statements Related Manuals Installation Notice Revision History Problems, Questions, and SuggestionsEdition E0895 First Printing Literal values Documentation Conventions Chapter ±1. HP 4x Speed CD±ROM Drive General Description Major Features of the CD±ROM Drive CD±ROM Drive Environmental Requirements TemperatureAltitude Humidity ±2. HP 4x Speed CD±ROM Physical Specifications CD±ROM Drive Physical Specifications Verifying Kit Contents Preparing to Install the CD±ROM DriveTools Required Minimum Requirements Set the SCSI±2 Address Address Jumpers ±3. SCSI±2 Address Settings Etc/ioscan ±d scsi Return Prepare the SystemUsr/sbin/ioscan ±d sdisk Return Ioscan No hardware found # /etc/shutdown ±h Return Single-Ended SCSI-2 Bus Configuration Constraints Type of Device Allowed Single-Ended SCSI-2 DevicesMaximum Number of SCSI-2 Devices per bus SCSI-2 Bus Termination Guidelines Power Off the Workstation and any Peripherals Using Your CD±ROM Drive Scsi ID and Device File Information for HP±UX Your CD±ROM Drive ConfigurationDevice ±1. CD±ROM Drive Controls and Features Controls and Features of the CD±ROM Drive Control/Feature Purpose Media Description Using the CD±ROM Drive ±2. CD±ROM Disc Tray Disc Tray Description Loading a CD±ROM Disc in a Horizontally Mounted Drive Unloading a CD±ROM Disc in a Horizontally Mounted Drive ±5. Inserting a CD±ROM Disc Vertical Mount Loading a CD±ROM Disc in a Vertically Mounted Drive ±10 Unloading a CD±ROM Disc in a Vertically Mounted Drive Mkdir /cdrom Return Mounting a CD±ROM Disc±11 Cd /cdrom Return Unmounting a CD±ROM Disc±12 ±13 ±14 Reading the Busy Light Maintenance and Troubleshooting Caring for the CD±ROM Discs Check the Address Settings for Single±Ended Drives TroubleshootingEtc/ioscan Return Screen similar to the following appears Usr/sbin/ioscan ±d sdisk Return Check the Hardware Installation Recheck the Address Settings # man cstm Return # man mstm Return # man xstm Return Verify the System Operation using SupportWave Following screen appears Cstm verify all Return When you see the prompt shown above, type the following Field Replaceable Units Removal and Replacement ProceduresRemoving and Replacing the CD±ROM Drive Description Part Number CD±ROM Drive A4325±60001 Appendix a Federal Communications Commission FCC Emissions RegulationsCanadian Department of Communications CDC Acoustics Emissions Regulations ComplianceRegulation On Noise Declaration For Machines ±3. Gsgv Electrostatic Discharge ESD Precautions Laserturvallisuus Loukan 1 Laserlaite Klass 1 Laser Apparat Laser Safety Statement For U.S.A. Only IEC 825 Class Laser Labels Warnung Appendix B Order Number A1658±90669 Edition E0895