Scsi Bus Differences, Fast, Wide Dif Ferential | Compaq C180, C240

SCSI Connections

SCSI Bus Differences

SCSI Bus Differences

A Small Computer Systems Interface (SCSI) bus is an IEEE standard bus for connecting your workstation to internal and external devices (SCSI devices) running at different speeds, singly or in combination. Examples of these SCSI devices are 4-mm DDS-format tape drives, CD-ROM drives, and Win- chester hard disk drives.

There are two types of SCSI buses available with this workstation - a nar- row, single-ended SCSI bus (SE SCSI), and a fast, wide differential SCSI bus (FWD SCSI) (on C160/C180/C200-upgrade), or an ultra wide single- ended SCSI bus (Ultra Wide-SE) (C200/C240/C360 only). Table 19 shows the speciﬁcation differences between these SCSI buses, and Table 20 shows the SCSI addresses, ID numbers, and arbitration priorities for each.

CAUTION:Do not mix single-ended and fast, wide devices on any one bus type. Doing this will

			cause a system failure.
Table 19			SCSI Bus Differences

			Data Bus	Maximum	Maximum	Device	Controller
	Transfer Rate		Data Bus	Maximum	Maximum	Physical	Embedded
	Transfer Rate		Width	Addresses*	Cable Length	Physical	Embedded
			Width	Addresses*	Cable Length	Location	or Plugable
						Location	or Plugable

	Narrow Single-
	Ended		8 bits	8	6.0 meters	Internal and	Embedded
			8 bits	8	6.0 meters	Internal and	Embedded
	Up to 5 Mbytes				(19.6 feet)	external
	per second

	Fast, Wide Dif-
	ferential		16 bits	16	25 meters	Internaland	Embedded
			16 bits	16	25 meters	Internaland	Embedded
	Up to 20 Mbytes				(82 feet)	external
	per second

153

Image 171

Compaq C180, C240, C200, C360, C160 manual Scsi Bus Differences, Fast, Wide Dif Ferential

Contents

HP Part No. A4200-90050 Edition E1298 Model C160 / C180 / C200 / C240 / C360 Owner’s Guide HEWLETT-PACKARD Warranty Statement Iii Page Contents Contents Using Your 3.5-Inch Floppy Disk Drive Using Your Digital Data Storage DDS Tape Drive Safety and Regulatory Statements Solving Problems Emissions Regulations Compliance Acoustics Changing Your Workstation’s Hardware Conﬁguration Scsi Connections Replacing the Battery Changing Your Monitor Type Determining Scsi Bus Length Boot Console Interface Xii Preface Safety and Regulatory Statements AudienceRelease Documents Revision History Related Manuals Literal values Documentation Conventions Problems, Questions, and Suggestions Xviii Product Information Product Information Product Description EISA/GSC System Power Switch System Unit Front Panel ControlsSystem Unit Front Panel Controls System LEDs Power LED Next to the system LEDs are the following audio controls Audio Controls CD-ROM Drive Controls and Features Storage Device Controls and Features Control/Feature Purpose CD-ROM Drive Controls and Features DDS-DC Later Model Drive Controls and Indicators DDS-DC Early Model Drive Controls and Indicators Tape Clean Floppy Drive Controls and Features Floppy Drive Controls and Features System Unit Rear Panel Connectors System Unit Rear Panel Connectors Pullout CardSecurity Loop Audio Connectors Max Output Level/Impedance Signal to NoiseAudio Electrical Speciﬁcations Frequency Response Input Sensitivity/Impedance PS/2 Keyboard and Mouse Connectors HP Parallel I/O ConnectorNetwork Connectors Serial I/O Pins Pin No Signal Description Serial Input/Output Connectors Scsi Connectors Power Cord ConnectorTOC Button Monitors Pointing Devices Keyboard Operating System Overview Using Your CD-ROM Drive Using Your CD-ROM Drive CD-ROM Drive CD-ROM Drive and CD-ROM Media Descriptions Controls and Features CD-ROM Drive Operating Controls and Features Caring for CD-ROM Discs CD-ROM Media CD-ROM Disc Tray Operating the CD-ROM DriveLoading and Unloading a CD-ROM in the Disc Tray Disc Tray Description Placing a CD-ROM Disc in a Horizontally Mounted Drive Loading a CD-ROM Disc in a Horizontally Mounted Drive Removing a CD-ROM Disc From a Horizontally Mounted Drive Unloading a CD-ROM Disc in a Horizontally Mounted Drive Releasing the Disc Holder Retainers Loading a CD-ROM Disc in a Vertically Mounted Drive Placing a CD-ROM Disc in a Vertically Mounted Drive Removing a CD-ROM Disc From a Vertically Mounted Drive Unloading a CD-ROM Disc in a Vertically Mounted Drive Usr/sbin/ioscan -d sdisk Return Verifying the CD-ROM Drive Operation Mounting a CD-ROM Disc Using SAM Mounting and Unmounting a CD-ROM DiscSam Return Peripheral Devices SystemsFrom the Actions menu, click on Add a Hard Disk Drive Floppy, and Hard Disks Unmounting a CD-ROM Disc Using SAM Reading the Busy Light Defective disc Troubleshooting Troubleshooting Using Your Digital Data Storage DDS Tape Drive Using Your Digital Data Storage DDS Tape Drive DDS-2 DDS Tape Drive Tape Drives Meter DDS Tape Drive and Data Cassette DescriptionsDDS Drive Storage Capacities DDS-2 Drive Controls and Indicators Controls and Indicators DDS-DC Early Model Tape Drive LED Display Codes LEDs LED Warning Conditions DDS-DC Later Model and DDS-2 Tape Drive LED Display Codes Media Life Data Cassettes Media Restrictions Cleaning the Tape Heads Setting the Write-Protect Tab on a DDS Tape Setting the Write-Protect Tab on a Data Cassette Operating the DDS Tape Drive Loading and Unloading a Data CassetteLoading and Unloading a Data Cassette Usr/sbin/ioscan -d stape Verifying the DDS Tape Drive Operation Using Device Files Writing to a Data Cassette Archiving Data Restoring Files from a Data Cassette to Your System Listing the Files on a Data CassetteTar -tvf /dev/rmt/devicefile Man tar Further Command Information Ordering Information Using Your 3.5-Inch Floppy Disk Drive Using Your 3.5-Inch Floppy Disk Drive Using the Floppy Diskette Setting the Write-Protect Tab on a DisketteSetting the Write-Protect Tab on a Floppy Diskette Inserting and Removing a Floppy Diskette Inserting and Removing a Diskette Verifying the Floppy Drive Configuration Operating the Floppy DriveIoscan From the Actions menu, click on View More Information Mediainit -i 2 devicefile Formatting a New Diskette Transferring Data To and From a Floppy Diskette Saving Files to a Floppy DisketteRestoring Files from a Floppy Diskette to Your System Tar -tvf deviceﬁle Listing the Files on a Floppy Diskette For More Information Configuring the Floppy Driver Troubleshooting Solving Problems Solving Problems Problem Solution Common Problems and SolutionsProblems with Powering Up the System Power -up Problems Problems Loading and Booting the Operating System Problems Loading and Booting the Operating System Problems with the 802.3 Network Problems with the 802.3 Network Problems Using a Hard Disk Drive Problems Using a Hard Disk Drive Problems Using the CD-ROM Drive Problems Using the CD-ROM Drive Problems Using the DDS Tape Drive Problems Using the DDS Tape Drive Problems Using the Floppy Disk Drive Problems Using the Floppy Disk Drive System Unit Front Panel LEDs LED Error Codes Likely cause SIMMs or processor LED Error Codes Dealing with a Boot Failure Man cstm Man mstm Man xstm Running System Verification Tests Cstm verify all Cstm Running System Veriﬁcation Tests Safety and Regulatory Statements Safety and Regulatory Statements Declaration of Conformity Declaration of Conformity Special Video Configuration Statements For EN55022 or Cispr 22 ApplicationsFor FCC Applications Federal Communications Commission FCC Emissions Regulations Vcci Class B ITE Japan Korea RRL EMI Class a Emissions Regulations Compliance Electrostatic Discharge ESD Precautions AcousticsRegulation On Noise Declaration For Machines -3. Gsgv Safety Statement Visible LEDs Laser Safety Statement U.S.A. Only Safety and Regulatory Statements Safety and Regulatory Statements Changing Your Workstation’s Hardware Configuration Also, read the ESD Precautions in Appendix a of this guide Usr/sbin/ioscan -f Checking the Scsi IDs 102 Preparing Your Workstation Removing the Floor Stand Installing Storage Devices Single-Ended Scsi Devices Preparing to Install Your Storage DeviceConfiguring your Storage Device Default Scsi IDs Ultra or Fast, Wide Scsi Devices 107 Removing the Storage Tray Storage Device Cable Routing Removing a Disk Filler Panel Installing a CD-ROM or a DDS-Format Tape Drive 110 Installing a Floppy Drive Installing a Floppy Drive Installing a Hard Disk Drive in Position Installing a Hard Disk Drive in Position Removing the Disk Interconnect Board Installing a Hard Disk Drive in Position 3 or Position Installing a Hard Disk Drive Installing the Disk Interconnect Board Replacing the Storage Tray Installing the Storage Tray Assembly 119 Configuring a Hard Disk Drive 121 Removing Main Tray Assembly Removing the Main Tray Assembly 123 Replacing the Main Tray Assembly Replacing the Main Tray Assembly 125 Installing Additional Memory C160/C180/C200/C240/C360 Memory Module Location Installing Memory Modules 129 Rotating the Eisa Fan Installing the Egram Enhanced Graphics RAM Module C160/C180 Removing the Eisa Slider and Retainer Installing the Egram Module Rotating the Eisa Fan Installing an Option Board Installing the Eisa Retainer and Eisa Slider Securing the Fan Option Slots from Outside the System Unit Installing an EISA, PCI, or GSC Option Board Graphics Adapter Considerations Special Video Configuration Statements Graphics Paths Graphics Configuration Restrictions 140 Installing the Option Board Rotating the FanRemoving the Eisa Retainer Removing the Eisa Slider and Blank Plate 143 144 145 Removing the Battery Replacing the Battery 147 Setting the Monitor Type from the Boot Console Interface Setting the Monitor Type at Power OnChanging Your Monitor Type Changing the Console to External Terminal 150 Scsi Connections 152 Fast, Wide Dif Ferential Scsi Bus Differences 154 Address 7 is reserved for host controller use on all buses Priority Address Scsi Cables Scsi Restrictions 157 Connectors and Terminators Maximum Number of NSE Scsi Devices Scsi Configuration ConstraintsNarrow, Single-ended Scsi Bus Configuration Constraints NSE Scsi Bus Conﬁguration Constraints Fast, Wide, Differential Scsi Bus Configuration Constraints Ultra, Wide-SE Scsi Bus Configuration ConstraintsUltra, Wide-SE Scsi Bus Conﬁguration Constraints Narrow, Single-Ended Scsi Bus Length Determining Scsi Bus Length Bus Length Worksheet for Narrow Single-Ended Scsi Bus Fast, Wide Differential Scsi Bus Length 164 Ultra, Wide, Single-Ended Scsi Bus Length Subtotals Total Ultra, Wide SE Scsi Bus Length = Assigning Scsi Device IDs 168 Narrow Single-Ended Scsi Device IDs External Device Drives Internal Device Drives Fast, Wide Differential Scsi Device Drives and Device ID Fast, Wide Differential Scsi IDs C160/C180/C200 Upgrades Ultra, Wide SE Scsi Device Drives and Device ID Ultra, Wide Scsi IDs Connecting to the Scsi Ports Rear Panel Scsi Connectors without TerminatorsSystem Scsi Port Connection 173 174 Boot Console Interface 176 Boot Console Interface Features 178 179 180 181 To access the boot console interface, follow these steps Accessing the Boot Console Interface Booting Your Workstation ISL hpux /stand/vmunix.prev Ctrl Searching for Bootable Media Resetting Your Workstation Displaying and Setting Paths Type Speciﬁcation Format Mnemonic Style Notation Displaying and Setting the Monitor Type Monitor CommandMonitor Displaying the Current Monitor Configuration Setting the Monitor Type 192 To restart the monitor selection process, press TAB 194 Displaying the Current Memory Configuration Memory Information Sample Detailed Memory Configuration Table SPA Group 197 Displaying the Status of the System I/O Setting the Auto Boot and Auto Search Flags Autosearch searches for devices in the following order Displaying and Setting the Security Mode SecureSecure on Secure off To enable fastboot, type the following at the prompt Displaying and Setting the Fastboot Mode Displaying the LAN Station Address AUTOdetect Configure and Display LAN Settings 205 Displaying System Information Displaying PIM Information 208 Glossary Bootstrap service See boot Glossary 211 212 Iconify See iconize 214 Mouse pointer See pointer Option See command option Scsi See Small Computer System In- terface Root See superuser System name See internet protocol address Working directory See current work- ing directory Utility See utility program 219 220 Index 222 223 224