Compaq S5 manual Scsi cable

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Glossary

SCSI cable

A 68-conductor (34 twisted pairs) cable used for differential bus connections.

single-ended SCSI bus

A bus in which each signal’s logic level is determined by the voltage of a single wire in relation to ground.

Small Computer System Interface

See SCSI.

StorageWorks

The Compaq set of enclosure products that allows customers to design and configure their own storage subsystem. Components include power, packaging, and interconnections in a StorageWorks shelf. SBBs and array controllers are integrated therein to form level enclosures to house the shelves. Standard mounting devices for SBBs are also included.

StorageWorks building block

See SBB.

target

A SCSI device that performs an operation requested by an initiator. Any device on the bus can be an initiator or a target.

target ID

See SCSI device ID.

termpower

Is an electrical current that is limited by self-resetting fuses.

UltraSCSI

Is an improvement in SCSI technology that was developed by the StorageWorks Engineering Group at Compaq Computer Corporation , and subsequently standardized by the ANSI SCSI committee (X3T10), which increases the maximum transfer rate on the SCSI bus from 10 MHz to 20 MHz (for a Wide SCSI bus this means an increase in maximum bus bandwidth from 20 MB/sec to 40 MB/sec).

EK–SMDZS–UG. B01

Glossary–3

Image 39 Contents
Dwzzh 16-Bit UltraSCSI Hub Rack-Mountable Second edition, November Japanese Vcci StatementContents Tables FiguresRevision Level Date Summary of Changes Revision RecordPage About This Guide AudienceRelated Documentation Introducing the 16-Bit UltraSCSI Hub Rack-Mountable Document StructureGetting Help Page Introducing the 16-Bit UltraSCSI Hub Rack-Mountable UltraSCSI Hub FeaturesDWZZH-S5 Product Descriptions DWZZH-S5DWZZH-09 DWZZH-09Lists the functional specifications for the Dwzzh Hub Product SpecificationsDwzzh HUB Functional Specifications Cont’d Page Setting Up the DWZZH-09 Set Up DWZZH-09Install 0.5m Cable in DWZZH-09 Install Tri-link and Cable in Storage Ports of SBBs A Sample Configuration Maximum Allowable Cable Distances Configuration NoteLarge Hub Fair Arbitration Using the 16-Bit UltraSCSI HubNarrow Addressing Setting Large Hub Addressing ConfigurationsDWZZH-S5 Scsi ID Assignments DWZZH-09 Scsi ID Assignments Front PanelDWZZH-S5 Front Panel Indicators Fair ARB DisableDWZZH-S5 Scsi Narrow ID Assignments Selecting the Scsi Cables Determining the ConfigurationDWZZH-09 Upgrade Kit Contents Installing the DWZZH-09 Upgrade KitInstall 0.5m Cable Install UpgradeInstall power cords in power supplies on unit Page Agents and Storage Swcc and UltraSCSI HubsRunning One Swcc Agent for a Particular Storage Subsystem Part Number Description Removable Parts of the DWZZH-S5 and DWZZH-09Figure A-1 Removable Parts of the DWZZH-S5 Controller GlossarySBB Scsi cable