StorageWorks DWZZH Manual de usuario
DWZZH 16–Bit SCSI Bus Hub
User’s Guide
EK–DWZZH–UG. B01
Digital Equipment Corporation
Maynard, Massachusetts
Second Edition, April 1998
While DIGITAL believes the information included in this publication is correct as of
the date of publication, it is subject to change without notice.
Any changes or modifications made to this equipment may void the user's authority to
operate this equipment.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment and receiver
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected
Consult the dealer or an experienced radio/TV technician for help
This equipment requires the use of shielded SCSI cables such as the Digital Equipment
Corporation BN37A-series.
StorageWorks and the DIGITAL logo are trademarks of Digital Equipment
Corporation.
Copyright © 1998 Digital Equipment Corporation All Rights Reserved
Printed in the USA
EK–DWZZH–UG. B01 iii
Contents
Revision Record…………………………………………………………………v
About This Guide………………………………………………………….…..vii
1 Introducing the 16-Bit SCSI Hub
1.1 SCSI Bus Hub Functions........................................................................................ 1–1
1.2 Product Descriptions.............................................................................................. 1–2
1.2.1 DWZZH 3.5" SBB Hubs .................................................................................. 1–2
1.2.2 DWZZH 5.25" SBB Hubs................................................................................. 1–4
1.2.3 SCSI Bus Components ..................................................................................... 1–5
1.3 Product Specifications............................................................................................ 1–6
2 Using a 16-Bit SCSI Hub
2.1 Large Hub Fair Arbitration..................................................................................... 2–1
2.2 Large Hub Addressing Configurations.................................................................... 2–2
2.3 Front Panel............................................................................................................. 2–4
2.3.1 Fair ARB Disable............................................................................................. 2–4
2.3.2 Indicators......................................................................................................... 2–5
2.3.3 Narrow Addressing Setting............................................................................... 2–5
2.4 Determining the Configuration............................................................................... 2–6
2.5 Selecting the SCSI Cables...................................................................................... 2–6
Glossary
Figures
1–1 DWZZH–21 or DWZZH-03 SCSI Bus Hub............................................................ 1–2
1–2 DWZZH–21 Front Panel ........................................................................................ 1–3
1–3 DWZZH–03 Front Panel ........................................................................................ 1–3
1–4 DWZZH–05 SCSI Bus Hub.................................................................................... 1–4
2–1 DWZZH–05 SCSI ID Assignments ........................................................................ 2–3
2–2 DWZZH Front Panel.............................................................................................. 2–4
2–3 DWZZH–05 SCSI Narrow ID Assignments............................................................ 2–5
2–4 DWZZH–05 SCSI Narrow Addressing Jumper....................................................... 2–6
Tables
1–1 SCSI Bus Hub Functional Specifications................................................................ 1–5
EK–DWZZH–UG. B01 v
Revision Record
The Revision Record provides a concise publication history of this guide. It lists the guide
revision levels and release dates, and summarizes the changes.
The following revision history lists all revisions of this publication and their effective
dates. The publication part number is included in the Revision Level column, with the
last entry denoting the latest revision. This publication supports the DWZZH 16-Bit
SCSI Bus Hub.
Revision Level Date Summary of Changes
EK–DWZZH–UG. A01 October 1997 Original Release.
EK–DWZZH–UG. B01 April 1998 Change title page;
Add Section 1.2.2 describing
DWZZH–05 hub;
Change Chapter 2 title from
“Installing” to “Using” and add
procedures for configuring a SCSI bus
using a DWZZH hub.
EK–DWZZH–UG. B01 vii
About This Guide
This chapter tells you what this User’s Guide does, identifies the audience, describes the
structure and contents (chapter-by-chapter) briefly, and tells you how to get support and
services from DIGITAL.
This User’s Guide describes the purpose, function, operation, and use of the DWZZH
16-Bit SCSI Bus Hub (the DWZZH Hub or the Hub). The DWZZH Hub allows the
connection of up to five ports on one logical SCSI bus.
Visit our Web Site for the Latest Information
Check our web site for the latest drivers, technical tips, and documentation. We
can be found in the technical area of our web page:
http://www.storage.digital.com/
Audience
This guide is intended for end users and for DIGITAL employees responsible for
configuring, installing, and maintaining the StorageWorks subsystem and its
components.
Related Documentation
You should be familiar with the information contained in the following
documentation:
Document Title Order Number
StorageWorks Solutions Configuration Guide EK–BA350–CG
StorageWorks Solutions Shelf and SBB User’s Guide EK–BA350–UG
StorageWorks SBB Shelf I/O Modules EK–SBBIO–UG
StorageWorks UltraSCSI Configuration Guidelines EK–ULTRA–CG
StorageWorks Solutions BA356–SB 16-bit Shelf User’s Guide EK–BA356–UG
DWZZH 16–Bit SCSI Bus Hub
viii EK–DWZZH–UG. B01
Document Structure
This guide contains the following chapters:
Chapter 1. Introducing the DWZZH Hub
This chapter gives brief functional and physical descriptions of the DWZZH Hub
and lists significant product specifications.
Chapter 2. Using the DWZZH Hub
This chapter gives the procedures for configuring a StorageWorks SCSI bus
using a DWZZH Hub.
Glossary
The Glossary defines terms that are used frequently with StorageWorks and SCSI
bus components.
Support and Services
Who to contact in the Americas
Information and Product Questions: Local Sales Office / StorageWorks Hotline
1-800-786-7967
Installation Support: Contact the DIGITAL Distributor where the
Storage Solution was Purchased / Local
DIGITAL Sales Office.
DIGITAL Multivendor Customer Service (MCS)
Installation Contact the DIGITAL Customer Support
Center (CSC).
Warranty Contact the DIGITAL Customer Support
Center (CSC) for warranty service after
solution is installed and operating.
Remedial Contact the DIGITAL Customer Support
Center (CSC)
Note: A Service Contract is recommended
when the equipment is out of warranty.
Contact the local DIGITAL Sales Office.
Customer Support Center (CSC) 1 800-354-9000
About This Guide
EK–DWZZH–UG. B01 ix
Who to contact in Europe
Information and Product Questions, Contact the DIGITAL Distributor or reseller
Installation Support, and Installation: from whom the Storage Solution was
purchased.
For Warranty Service See the Warranty Card packaged with the
product.
For Remedial Service Contact the DIGITAL Distributor or reseller
from whom the Storage Solution was
purchased.
Note: A Service Contract is recommended
when the equipment is out of warranty.
Who to contact in Asia Pacific
For all services, contact the DIGITAL Distributor or reseller from whom the
equipment was purchased.
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