Instruction/ maintenance manual of the product DWZZH Compaq
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DWZZH 16-Bit UltraSCSI Hub User’s Guide EK–DWZZH–UG. D01 Compaq Computer Corporation.
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.
Achtung! Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen verantwortlich ist. Attention ! Ceci est un produit de Classe A.
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EK–DWZZH–UG. D01 v Contents Revision Record ……………………………………………………………….. vii About This Guide ………………………………………………………….….. .ix 1 Introducing the DWZZH UltraSCSI Hub 1.
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.................................
EK–DWZZH–UG. D01 vii Revision Record The Revisi on Record provides a concise publi cation history of t his guide. It lists t he guide revision levels and release dates, and summarizes the changes. The following revision history lists all revisions of this publication and their effective dates.
DWZZH 16-Bit UltraSCSI Hub viii EK – DWZZH–UG. D01 EK–DWZZH–UG. D01 October 1998 Change Section 2.1, add CAUTION after Section 2.1. Make minor changes to Section 2.3.3; renumber Section 2.3.3 as Section 2.3. Renumber Sections 2.3, 2.4, 2.5, and 2.
EK–DWZZH–UG. D01 ix About This Guide This chapter tells you what this User’s Guide does, identifies the audience, describes the struct ure and contents (chapter- by-chapter) briefly, and tell s you how to get suppor t and services from Compaq.
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 Hub and lists significant product specifications.
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 was purchased. For Warranty Service See the Warranty Card packaged with the product.
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EK–DWZZH–UG. D01 1–1 1 Introducing the DWZZH UltraSCSI Hub This chapter descr ibes the DWZZH Hub functions and availabl e versions, and list the Hub functional specifications.
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.
Chapter 1. Introducing the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 1–3 Figure 1–2 DWZZH–21 Front Panel NOTE The si ngle–ended s ymbol wit h the downwar d– point ing di amond in Fi gure 1- 2.
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 that contains five differential UltraSCSI bus connectors. CAUTION Connect ing a si ngle- ended bus c able t o any differential connector causes the SCSI bus to fail.
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 ID SCSI Addresses The small UltraSCSI HUB does not use a SCSI ID.
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 Gli.
EK–DWZZH–UG. D01 2–1 2 Using the DWZZH UltraSCSI Hub This chapter discusses fair ar bitrat ion of the SCSI bus by t he 5.25" SBB Hub, describes addressing configurations, tells you how to use the large Hub fr ont panel, and gives guidelines for selecting the SCSI cables.
DWZZH 16–Bit UltraSCSI Hub 2–2 EK–DWZZH–UG. D01 removed from the group and at the next arbitration phase, the remaining highest ID will be serviced. This will continue until all of the IDs in the group have been serviced once. All requests from IDs not contained in the register will be “backed off ” using ID 7.
Chapter 2. Using the DWZZH UltraSCSI Hub EK–DWZZH–UG. D01 2–3 Figure 2–1 DWZZH–05 SCSI ID Assignments C o n tro ll e r P o rt S C S I ID 6 -0 Hos t Por t S C S I ID 1 5 Hos t P or t SCS I I D 1 4 Ho s t Po r t SCSI I D 13 Ho st Po r t SCSI I D 12 S HR- 1 0 6 9 2.
DWZZH 16–Bit UltraSCSI Hub 2–4 EK–DWZZH–UG. D01 Figure 2–2 DWZZH–05 SCSI Narrow ID Assignments C o n tro ll e r P o rt S C S I ID 6 -4 Ho st Po r t S C S I ID 3 Ho st P o rt SCS I I D 2 Ho.
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).
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 Busy Power S HR- 1 0 7 0 Fai r D i sabl e NOTE The black part of the s wit ch i n the di agram indicates the position of the switch.
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 indicates that POWER is applied to the Hub, while the yellow LED indicates that the SCSI bus is BUSY.
DWZZH 16–Bit UltraSCSI Hub 2–8 EK–DWZZH–UG. D01 Table 2-1 Combinations of UltraSCSI Hubs and Devices in StorageWorks Shelves Number of Small Hubs (DWZZH–03/–21) Number of Large Hubs (DWZZH.
EK–DWZZH–UG. D01 3–1 3 SWCC and UltraSCSI Hubs This chapter is intended to provide you with import ant inform ation regarding t he use of StorageWor ks Command Console on SCS I buses t hat have an UltraSCSI Hub. While the informat ion provided here is important , it is essential that you have read the SWCC Manual and Release Notes.
DWZZH 16-Bit UltraSCSI HUB 3–2 EK–DWZZH–UG. D01 This type of configuration would prevent systems with different SCSI IDs from accessing disks ‘ belonging to ’ a particular SCSI ID, which promotes data security between servers on a shared SCSI bus; however, it does not prevent SWCC from performing tasks on those disks.
Chapter3. SWCC and UltraSCSI Hubs EK–DWZZH–UG. D01 3-3 Figure 3-1 Running One SWCC Agent for a Particular Storage Subsystem BA 370 Cabine t wi t h HS Z 70 C o nt rollers Host S y st em Host S y st.
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EK–DWZZH–UG. D01 Glossary–1 Glossary This Glossary includes an alphabetized listing and brief definition of the abbreviations, acronyms, Compaq-specific refer ences, and other technical terms t hat are used in this manual and that may be unfamiliar to the reader.
DWZZH 16–UltraSCSI Hub Glossary–2 EK–DWZZH–UG. D01 host adapter A device that connects the host system I/O bus (for example, a PCI bus) to the storage SCSI bus. A host adapter performs the lower layers of the SCSI protocol and normally operates in the initiator role.
Glossay EK–DWZZH–UG. D01 Glossary–3 SCSI end-bus position The physical location of a controller or a device that contains the SCSI bus termination. SCSI mid-bus position The physical location of a controller or a device that the SCSI bus passes through enroute to the controller or device that contains the SCSI bus termination.
DWZZH 16–UltraSCSI Hub Glossary–4 EK–DWZZH–UG. D01 UltraSCSI An improvement in SCSI technology invented in 1993 by the Compaq Computer Corporation StorageWorks Engineering Group. Subsequently the ANSI SCSI Standards Committee issued standard X3T10 for UltraSCSI.
An important point after buying a device Compaq DWZZH (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Compaq DWZZH yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Compaq DWZZH - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Compaq DWZZH you will learn all the available features of the product, as well as information on its operation. The information that you get Compaq DWZZH will certainly help you make a decision on the purchase.
If you already are a holder of Compaq DWZZH, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Compaq DWZZH.
However, one of the most important roles played by the user manual is to help in solving problems with Compaq DWZZH. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Compaq DWZZH along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
