Compaq DWZZH manual Fourth Edition, November

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Fourth Edition, November 1998

While Compaq Computer Corporation believes the information included in this manual is correct as of the date of publication, it is subject to change without notice. Compaq makes no representations that the interconnection of its products in the manner described in this document will not infringe existing or future patent rights, nor do the descriptions contained in this document imply the granting of licenses to make, use, or sell equipment or software in accordance with the description. No responsibility is assumed for the use or reliability of firmware on equipment not supplied by Compaq or its affiliated companies. Possession, use, or copying of the software or firmware described in this documentation is authorized only pursuant to a valid written license from Compaq, an authorized sublicensor, or the identified licensor.

Commercial Computer Software, Computer Software Documentation and Technical Data for Commercial Items are licensed to the U.S. Government with Compaq’s standard commercial license and, when applicable, the rights in DFAR 252.227 7015, “Technical Data-Commercial Items.”

© 1998 Compaq Computer Corporation. All rights reserved. Printed in U.S.A.

Compaq, the Compaq logo, DIGITAL, DIGITAL UNIX, DECconnect, HSZ, HSG, StorageWorks, VMS, OpenVMS Registered in the United States Patent and Trademark Office.

UNIX is a registered trademark in the United States and other countries exclusively through X/Open Company Ltd. Windows NT is a registered trademark of the Microsoft Corporation. Sun is a registered trademark of Sun Microsystems, Inc. Hewlett-Packard, TACHYON, and HP-UX are registered trademarks of the Hewlett-Packard Company. IBM and AIX are registered trademarks of International Business Machines Corporation. All other trademarks and registered trademarks are the property of their respective owners.

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the manuals, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Restrictions apply to the use of the local-connection port on this series of controllers; failure to observe these restrictions may result in harmful interference. Always disconnect this port as soon as possible after completing the setup operation. Any changes or modifications made to this equipment may void the user's authority to operate the equipment.

Warning!

This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

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Contents Dwzzh 16-Bit UltraSCSI Hub Fourth Edition, November Japan Page Contents Figures Cont’d TablesRevision Record Revision Level Date Summary of ChangesEK- DWZZH-UG. D01 Audience About This GuideVisit our Web Site for the Latest Information Related DocumentationSupport and Services Who to contact in the Americas Document StructureWho to contact in Europe Who to contact in Asia PacificPage Introducing the Dwzzh UltraSCSI Hub UltraSCSI Hub FunctionsProduct Descriptions Dwzzh 3.5 SBB HubsDWZZH-21 Front Panel Dwzzh 5.25 SBB Hubs Scsi Bus ComponentsProduct Specifications Lists the functional specifications for the Dwzzh HubDwzzh Hub Functional Specifications Cont’d Feature Using the Dwzzh UltraSCSI Hub Large Hub Fair ArbitrationLarge Hub Addressing Configurations Narrow Addressing Setting DWZZH-05 Scsi ID AssignmentsDWZZH-05 Scsi Narrow ID Assignments W1 To enable narrow addressing mode, install a jumper at W1 Fair Arb Disable Front PanelPlacement of UltraSCSI Hubs IndicatorsDetermining the Configuration Selecting the Scsi CablesNot installed Swcc and UltraSCSI Hubs Agents and StorageDwzzh 16-Bit UltraSCSI HUB DWZZH-05 Page Glossary ControllerSBB Scsi end-bus position Very High Density Cable Interconnect