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DWZZH 16–Bit UltraSCSI
Hub (Rack-Mountable)
User’s Guide
EK–SMDZS-UG. B01
Compaq Computer Corporation
Houston, Texas
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Second edition, November 1998 This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) This device must accept any interference that may cause undesirable operation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, ma
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Contents Revision Record…………………………………………………………………v About This Guide………………………………………………………….…..vii 1 Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) 1.1 UltraSCSI Hub Features..........................................................................................1–1 1.2 Product Descriptions...............................................................................................1–2 1.2.1 DWZZH-S5 .........................................................................................
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DWZZH 16-Bit UltraSCSI Hub (Rack-Mountable) Figures 1–1 DWZZH–S5 ...........................................................................................................1–2 1–2 DWZZH–09............................................................................................................1–3 2–1 Attach Tri–Link to Cable ........................................................................................2–1 2–2 Install Tri–Link and Cable in Storage Ports of SBBs........................
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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 UltraSCSI Bus Hub. Revision Level Date Summary of Changes EK–SMDZS–
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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 COMPAQ. This User’s Guide describes the purpose, function, operation, and use of the DWZZH 16-Bit UltraSCSI Rack-Mountable Hub (the DWZZH Hub or the Hub). The DWZZH Hub allows the connection of up to five ports on one logical SCSI bus on the DWZZH-S5 model and up to nine on the DWZZH-09
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DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) Shared Storage Solutions Using UltraSCSI Hubs EK-SMA21-AN Shared Storage for Windows NT Using UltraSCSI Hubs EK-SMA17-AN Shared Storage for OpenVMS Using UltraSCSI Hubs EK-SMA19-AN Shared Storage for DIGITAL UNIX Using UltraSCSI Hubs EK-SMA20-AN Shared Storage for Sun Solaris Using UltraSCSI Hubs EK-SMA18-AN Document Structure This guide contains the following chapters: Chapter 1. Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) This chapter give
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About This Guide Getting Help If you have a problem and have exhausted the information in this guide, you can get further information and other help in the following locations. Compaq Web Site The Compaq Web Site has information on this product as well as the latest drivers and Flash ROM images. You can access the Compaq Web Site by logging on to the Internet at http://www.compaq.com. Telephone Numbers For the name of your nearest Compaq Authorized Reseller: In the United States, call 1-800-345-
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1 Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) This chapter gives a brief physical description and describes the functions and functional specifications of the DWZZH-S5 and DWZZH-09 UltraSCSI Hubs. The series of DWZZH Hubs are SCSI–2 and draft SCSI–3 (ANSI X379.2/91– 10R3) compliant capable with data transfer rates of up to 40 Mbytes per second. The two versions of these Hubs are: • DWZZH-S5: A shelf-contained, rack-mountable, 5.25" SBB (large) Hub with four host ports and one storage
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DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable) 1.2 Product Descriptions 1.2.1 DWZZH-S5 A DWZZH-S5 large UltraSCSI Hub (See Figure 1-1) consists of two 180W power supplies, three bulkhead covers, a personality card cover, and a DWZZH-05 SBB mounted within a shelf. This model is rack-mountable, in either a horizontal or vertical position. Termination is provided by each of the host ports. A feature of the DWZZH-S5 Hub is that it is upgradeable from a five port Hub to a nine port Hub with the purc
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Chapter 1. Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) 1.2.2 DWZZH-09 The DWZZH -09 is made up of two large Hubs connected by a 0.5m VHDCI cable (BN 37A-0E). A tri-link attached to the DWZZH-A5 portion of the Hub allows the attachment of a storage device up to 25 meters away from the Hub. The Hub provides radial connectivity by allowing the user to connect up to eight host bus adapters from any number of distributed systems to the DWZZH-09. Termination is provided by each of the hos
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DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable) 1.3 Product Specifications Table 1-1 lists the functional specifications for the DWZZH Hub. Table 1–1 UltraSCSI Hub Functional Specifications Feature Specification SCSI ID The small UltraSCSI Hub does not use a SCSI ID. SCSI Addresses The large UltraSCSI Hub uses SCSI ID 7 for arbitration, when the fair arbitration option is enabled. Overload Protection TERMPOWER is not supplied by the UltraSCSI Hub. DTERMPOWER Internal TERMPOWER is protected v
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Chapter 1. Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) 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 due to wired-OR glitches on the BSY line. Termination Differential Termination for 16-bit operation. Service There are no user serviceable functions on these products. Contact Dig
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2 Setting Up the DWZZH-09 This chapter gives instructions for setting up and configuring the DWZZH-09 Hub. 2.1 Set Up DWZZH-09 1. After removing the unit from the box, shipping material, and plastic bag, set it in a secure place or mount in a rack. 2. Remove the following parts from the shipping bag: • 0.5m Cable, P/N BN37A-0E • Tri-link NOTE If you do not have all of the above listed parts, contact your sales representative. 2.1.1 Install 0.5m Cable in DWZZH-09 1. Attach the 0.5m cable to the
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DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) 2. Install and secure tri-link in storage port of right-hand SBB (-A5). Then install and secure the opposite end of the cable in the storage port of the left hand SBB (-05), Figure 2-2. Figure 2-2 Install Tri-link and Cable in Storage Ports of SBBs SHR-1110 3. Install power cords in power supplies on unit. 4. Attach the cables from your host bus adapters to their respective ports on the DS-DWZZH-09. Refer to Chapter 3, Figure 3-2 for the SCSI ID port
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Chapter 2. Setting Up the DWZZH-09 Figure 2–3 A Sample Configuration EK–SMDZS–UG. B01 2–3
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DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) 2.2 Configuration Note According to the UltraSCSI Configuration Guidelines (included in your purchase), the maximum allowable cable distance for an UltraSCSI Domain is 74 meters. Each element, including the DWZZH-09 has an associated relative cable distance value associated. Cables count as their specified distance, (including the 0.5 meter jumper cable between the SBB Hubs); but each DWZZH SBB counts as an 18.5 meter cable equivalent. This means that
