Page 2 - Fourth Edition, November 1998
Fourth Edition, November 1998 While Compaq Computer Corporation believes the information included in this manual is correctas of the date of publication, it is subject to change without notice. Compaq makes norepresentations that the interconnection of its products in the manner described in this do...
Page 5 - Contents; Revision Record..........................................................................; Introducing the DWZZH UltraSCSI Hub
EK–DWZZH–UG. D01 v Contents Revision Record……………………………………………………………….. vii About This Guide………………………………………………………….….. .ix 1 Introducing the DWZZH UltraSCSI Hub 1.1 UltraSCSI Hub Functions ...................................................................................... 1–1 1.2 Product Descriptio...
Page 6 - Tables
DWZZH 16-Bit UltraSCSI Hub vi EK–DWZZH–UG. D01 Figures (Cont’d) 3–1 Running One SWCC Agent for a Particular Storage Subsystem ............................. 3–3 Tables 1–1 DWZZH Hub Functional Specifications.................................................................. 1–5 2–1 Combinations of Ult...
Page 7 - Revision Record; Revision Level
EK–DWZZH–UG. D01 vii Revision Record The Revision Record provides a concise publication history of this guide. It lists the guiderevision levels and release dates, and summarizes the changes. The following revision history lists all revisions of this publication and theireffective dates. The publica...
Page 9 - About This Guide; Visit our Web Site for the Latest Information; Document Title; EK–SBBIO–UG
EK–DWZZH–UG. D01 ix About This Guide This chapter tells you what this User’s Guide does, identifies the audience, describes thestructure and contents (chapter-by-chapter) briefly, and tells you how to get support andservices from Compaq. This User’s Guide describes the purpose, function, operation, ...
Page 10 - Document Structure; This guide contains the following chapters:; Chapter 1. Introducing the DWZZH UltraSCSI Hub; Support and Services
DWZZH 16–Bit UltraSCSI Hub x EK–DWZZH–UG. D01 Document Structure This guide contains the following chapters: Chapter 1. Introducing the DWZZH UltraSCSI Hub This chapter gives brief functional and physical descriptions of the DWZZH Huband lists significant product specifications. Chapter 2. Using the...
Page 11 - Who to contact in Europe; Who to contact in Asia Pacific
About This Guide EK–DWZZH–UG. D01 xi Who to contact in Europe Information and Product Questions, Contact the Compaq Distributor or reseller Installation Support, and Installation: from whom the Storage Solution waspurchased. For Warranty Service See the Warranty Card packaged with theproduct. For Re...
Page 13 - UltraSCSI Hub Functions; Extend the maximum length of a SCSI bus.
EK–DWZZH–UG. D01 1–1 1 Introducing the DWZZH UltraSCSI Hub This chapter describes the DWZZH Hub functions and available versions, and list theHub functional specifications. The series of DWZZH Hubs are SCSI–2 and draft SCSI–3(ANSI X379.2/91–10R3) compliant 16-bit converters capable of data transferr...
Page 14 - Product Descriptions; CAUTION
DWZZH 16-Bit UltraSCSI Hub 1–2 EK–DWZZH–UG. D01 1.2 Product Descriptions There are two classes of DWZZH Hubs: 3.5" SBB Hubs, and 5.25" SBB Hubs. 1.2.1 DWZZH 3.5" SBB Hubs The DWZZH small UltraSCSI Hub (Figure 1-1) comes in two versions. • DWZZH-21 contains two single–ended UltraSCSI conn...
Page 15 - Figure 1–2 DWZZH–21 Front Panel; Figure 1–3 DWZZH–03 Front Panel; NOTE
Chapter 1. Introducing the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 1–3 Figure 1–2 DWZZH–21 Front Panel NOTE The single–ended symbol with the downward–pointing diamond in Figure 1-2 indicates that thelower two connectors are single–ended UltraSCSIconnections, while the differential symbol with theright–...
Page 16 - EK–ULTRA–CG, for a complete list of the available cables.
DWZZH 16-Bit UltraSCSI Hub 1–4 EK–DWZZH–UG. D01 1.2.2 DWZZH 5.25" SBB Hubs The DWZZH large UltraSCSI Hub (Figure 1-4) comes in a single version thatcontains five differential UltraSCSI bus connectors. CAUTION Connecting a single-ended bus cable to anydifferential connector causes the SCSI bus to...
Page 17 - Product Specifications; Table 1-1 lists the functional specifications for the DWZZH Hub.; Table 1–1 DWZZH Hub Functional Specifications
Chapter 1. Introducing the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 1–5 1.3 Product Specifications Table 1-1 lists the functional specifications for the DWZZH Hub. Table 1–1 DWZZH Hub Functional Specifications Feature Specification SCSI IDSCSI Addresses The small UltraSCSI HUB does not use a SCSI ID. Th...
Page 18 - Table 1–1 DWZZH Hub Functional Specifications (Cont’d)
DWZZH 16-Bit UltraSCSI Hub 1–6 EK–DWZZH–UG. D01 Table 1–1 DWZZH Hub Functional Specifications (Cont’d) Feature Specification Cable Fault DIFFSENSE support and port disable on cable fault Glitch Elimination 100% glitch free operation during power-up BUSY GLITCH trap eliminates cable length constraint...
Page 19 - Using the DWZZH UltraSCSI Hub; Large Hub Fair Arbitration
EK–DWZZH–UG. D01 2–1 2 Using the DWZZH UltraSCSI Hub This chapter discusses fair arbitration of the SCSI bus by the 5.25" SBB Hub, describesaddressing configurations, tells you how to use the large Hub front panel, and givesguidelines for selecting the SCSI cables. UltraSCSI Configuration guidel...
Page 20 - Large Hub Addressing Configurations
DWZZH 16–Bit UltraSCSI Hub 2–2 EK–DWZZH–UG. D01 removed from the group and at the next arbitration phase, the remaining highestID will be serviced. This will continue until all of the IDs in the group have beenserviced once. All requests from IDs not contained in the register will be“backed off ” us...
Page 21 - Figure 2–1 DWZZH–05 SCSI ID Assignments; Narrow Addressing Setting
Chapter 2. Using the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 2–3 Figure 2–1 DWZZH–05 SCSI ID Assignments C o n tr o lle r P o r t S C S I ID 6 - 0 H o s t P o r t S C S I ID 1 5 H o s t P o r t S C S I I D 1 4 H o s t P o r t S C S I ID 1 3 H o s t P o r t S C S I ID 1 2 S H R - 1 0 6 9 2.3 Narrow Addr...
Page 22 - Figure 2–2 DWZZH–05 SCSI Narrow ID Assignments
DWZZH 16–Bit UltraSCSI Hub 2–4 EK–DWZZH–UG. D01 Figure 2–2 DWZZH–05 SCSI Narrow ID Assignments C o n tr o lle r P o r t S C S I ID 6 - 4 H o s t P o r t S C S I ID 3 H o s t P o r t S C S I I D 2 H o s t P o r t S C S I ID 1 H o s t P o r t S C S I ID 0 S H R - 1 0 7 1
Page 23 - Figure 2–3 DWZZH–05 SCSI Narrow Addressing Jumper; W1 (To enable narrow addressing mode, install a jumper at W1)
Chapter 2. Using the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 2–5 Figure 2–3 DWZZH–05 SCSI Narrow Addressing Jumper W1 (To enable narrow addressing mode, install a jumper at W1)
Page 24 - Front Panel; Figure 2–4 DWZZH–05 Front Panel
DWZZH 16–Bit UltraSCSI Hub 2–6 EK–DWZZH–UG. D01 2.4 Front Panel Figure 2-4 shows the location of the front panel controls and indicators. Figure 2–4 DWZZH–05 Front Panel B u s y P o w e r S H R - 1 0 7 0 F a ir D is a b l e NOTE The black part of the switch in the diagramindicates the position of th...
Page 25 - Determining the Configuration
Chapter 2. Using the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 2–7 2.4.2 Indicators The large Hub has two indicators on the front panel. The green LED indicatesthat POWER is applied to the Hub, while the yellow LED indicates that the SCSIbus is BUSY. 2.5 Determining the Configuration The UltraSCSI Hub is...
Page 27 - SWCC and UltraSCSI Hubs; Agents and Storage
EK–DWZZH–UG. D01 3–1 3 SWCC and UltraSCSI Hubs This chapter is intended to provide you with important information regarding the use ofStorageWorks Command Console on SCSI buses that have an UltraSCSI Hub. Whilethe information provided here is important, it is essential that you have read the SWCCMan...
Page 31 - Glossary
EK–DWZZH–UG. D01 Glossary–1 Glossary This Glossary includes an alphabetized listing and brief definition of the abbreviations,acronyms, Compaq-specific references, and other technical terms that are used in thismanual and that may be unfamiliar to the reader. adapter See SCSI bus converter. building...
Page 34 - UltraSCSI; VHDCI; Very High Density Cable Interconnect
DWZZH 16–UltraSCSI Hub Glossary–4 EK–DWZZH–UG. D01 UltraSCSI An improvement in SCSI technology invented in 1993 by the Compaq Computer CorporationStorageWorks Engineering Group. Subsequently the ANSI SCSI Standards Committee issuedstandard X3T10 for UltraSCSI. The UltraSCSI improvements over Fast SC...
