Scsi Bus Differences | HP visualize J6000 work stations manual

SCSI Connections

SCSI Bus Differences

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 buswhich 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.

CAUTION Do not mix SE and LVD SCSI devices on the same SCSI bus as this can cause reduction in device performance.

Table C-1. SCSI Bus Differences

			Maximum	Maximum
SCSI Type	Transfer Rate	Data Bus	Addresses1	Cable
		Width		Length

NSE	Up to 20 MB/sec	8 bits	0 through 6	3.0 meters
				(9.84 feet)

UWSE	Up to 40 MB/sec	16 bits	0 through 6	3.0 meters
			8 through 15	(9.84 feet)

LVD	Up to 80 MB/sec	16 bits	0 through 6	12 meters
			8 through 15	(39.37 feet)

1. Address 7 is reserved for host controller use on all SCSI buses.

CAUTION A narrow SCSI device can not be placed between two wide devices.

Appendix C

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Image 135

HP visualize J6000 work stations manual Table C-1. Scsi Bus Differences

Contents

Technical Reference Restricted Rights Legend Contents Boot Console Handler System Upgrades Contents Block Diagram Regulatory StatementsSpeciﬁcations Related Documentation Scsi Connections Contents Safety and Regulatory Statements Installation NoticeRelated Manuals Documentation Conventions Problems, Questions, and SuggestionsElectrostatic Discharge ESD Precautions Revision History LVD Product Information Net Dimensions and Weights Chapter OverviewProduct Description Weight Net Weights for the J6000 Workstations Key Features Monitors Currently Supported Optional Graphics Cards Currently Supported Front Panel Components Power Switch System LCD Thumbscrew on the Front Panel Hard Disk Drives Internal Storage Devices Replacing a Failed Disk Drive Hot-Plug Process Volume Description Hot-Plug ExampleExample Conﬁguration Step Hot-Plug Procedure Ioscan /dev/dsk/c2t5d0 Mkboot /dev/rdsk/c2t5d0 CD ROM Drive Optional Feature Purpose Rear Panel Components System Unit Rear Panel Connectors Connectors on the Rear Panel Scsi Connectors Audio ConnectorsAudio Electrical Speciﬁcations Audio Electrical Speciﬁcations VRMs System Board Internal Components Voltage Regulator Modules VRMs MicroprocessorsPCI Cage CD ROM and Hard Disk Drive Bays Mouse Site Preparation and InstallationMonitors Keyboard Monitors Troubleshooting Flowcharts for Troubleshooting Introduction to Troubleshooting Main Flowchart for Troubleshooting Console Troubleshooting Flowchart Bootable Device Troubleshooting Flowchart HP-UX Troubleshooting Flowchart Special Considerations Dealing with a Boot Failure Searching for Bootable Media Boot Command NotationsStable Storage Intermediate System Loader ISL Environment Supported Boot Paths Selftest Failures Identifying LCD-Indicated Conditions Memory Failures Message Description Chassis CodesChassis Codes for J6000 Workstations Ostat Code CPU n detected an unexpected data CPU n is starting its external interrupt CPU n is starting its TLB translation Eeprom CPUn invoke LDB CPU n is starting the low-level debugger FRU CPU n is starting its data cache miss Try to ﬁnd a single memory bank to use Dimm table is full--cannot add new Insufﬁcient error-free memory to Memory ECC test failed to detect Multiple memory errors detected Cannot load Iodc entryio for boot USB keyboard Serial port 1 failed to initialize as a Monarch CPU is starting the late Look for built-in graphics card Lpmc Transfer of Control caused entry to PCI data parity error. I/O error log word PCI device asserted SERR# multiple While processing another Hpmc Messages similar to the following appear Running System Veriﬁcation Tests Eeprom Running ODE-Based Diagnostics Interpreting the System Board LEDs Using the System Board LEDs for TroubleshootingLED Name LED’s Color Description When On Interpreting the LED Information VRM0 Blink Sequences for the Fans LED Troubleshooting with System Board LEDs Solutions for the Non-Default LED StatesLED Name1 Non-Default Solution State VRM0 OFF Short Using the System Board LEDs for Troubleshooting System Upgrades Workstation Conﬁgurations Tools Required Electrostatic Discharge ESD Precautions System Upgrades Prerequisite for the System Upgrade Procedures Front Bezel and Top Cover Removing the Top Cover Hard Disk Drive Conﬁguration Installing and Removing the Hard Disk Drives Installing and Removing an Internal CD ROM Drive Installing and Removing Memory DIMMsJ6000 Memory Conﬁguration Memory Loading Sequence in the J6000 Installing an I/O Card Installing and Removing an I/O Card PCI Slot Information for I/O Cards Boot Console Handler Boot Console Handler Boot Console Handler Features Accessing the Boot Console Handler Reset Boot Console Menus Or modify processor boot ID ALL Clearpim Booting the Workstation ISL Searching for Bootable Media Then type the following at the prompt Resetting the Workstation Path Type Device Displaying and Setting PathsSystem Paths Mnemonic Style Notation 100 Monitor Command Displaying and Setting the Monitor Type Displaying the Current Monitor Conﬁguration Setting the Monitor Type Monitor Information Setting the Monitor Type at Power On Changing the Console to an External Terminal Troubleshooting Monitor Problems Memory Information Memory Status Table Displaying the Current Memory Conﬁguration Hversion Sversion Displaying the Status of the I/O Slots Setting the Auto Boot and Auto Search Flags Displaying and Setting the Security Mode To enable fastboot, type the following Displaying and Setting Fastboot Mode Displaying the LAN Station Address Displaying PIM Information Displaying System Information Press Type Description Using Remote Power-On Troubleshooting Hint for an Unresponsive RPC Setting the Fan Speed Rack-Mount Fan SpeedDesk-Side Fan Speed Configuration Menu Enter command FanChoice DeskSide Initial System Loader ISL Environment Invoking ISL from the Boot Console Handler ISL User Commands 120 Block Diagram System Board and PCI Board Block Diagram of the J6000’s System Board and PCI Board Regulatory Statements 124 Federal Communications Commission FCC Electromagnetic Compatibility 126 Regulation on Noise Declaration for Machines Laser Safety Statement for a Class 1 Laser ProductOptical and Acoustical Statements Visible LED Statement Optical and Acoustical Statements 128 Speciﬁcations Environmental Speciﬁcations Vibration Shock Input Power Electrical SpeciﬁcationsJ6000 Scsi Connections Appendix Overview Table C-1. Scsi Bus Differences Scsi Bus Differences Scsi Restrictions CablesTerminators Scsi Conﬁguration Constraints Scsi Bus Length Constraints SE Scsi Bus LengthLVD Scsi Bus Length Assigning Scsi Device IDs Assigning Internal Scsi Device IDs Assigning External Scsi Device IDs Related Documentation Site Preparation Guide Installation Poster and Getting Started GuideParts and Replacement Guide Additional Documentation