DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) User’s Guide EK–SMDZS-UG.
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.
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 ................................................................................................
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................................
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–UG.
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 unit.
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.
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.
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: 1.1 • DWZZH-S5: A shelf-contained, rack-mountable, 5.
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.
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 host ports.
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 SCSI ID SCSI Addresses Overload Protection DTERMPOWER STERMPOWER Shielding, Enclosure & Connectors Power-Up Reset SCSI Bus Reset Differential SCSI Bus Length Ultra (20 megatransfers per second or 40 MB/s) Data Timing Design 1–4 Specification The small UltraSCSI Hub does not use a SCSI ID.
Chapter 1. Introducing the 16-Bit UltraSCSI Hub (Rack-Mountable) Table 1–1 DWZZH HUB Functional Specifications (Cont’d) Feature Cable Fault Glitch Elimination Specification DIFFSENSE support and port disable on cable fault. 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.
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.
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 SH R-111 0 3. 4. 5. 2–2 Install power cords in power supplies on unit. Attach the cables from your host bus adapters to their respective ports on the DS-DWZZH-09.
Chapter 2. Setting Up the DWZZH-09 Figure 2–3 A Sample Configuration EK–SMDZS–UG.
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.
3 Using the 16-Bit UltraSCSI Hub This chapter discusses fair arbitration of the SCSI bus by the 5.25" SBB Hub. It describes addressing configurations, tells you how to use the large Hub front panel, and gives guidelines for selecting the SCSI cables. UltraSCSI configuration guidelines are documented in EK-ULTRA-CG. These guidelines include a list of all UltraSCSI components and the last few example configurations include an UltraSCSI Hub.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) After all the IDs in the group have been serviced, a new group of IDs will be captured at the next arbitration phase. The fair arbitration algorithm only applies to host port SCSI IDs as defined by the assignment in each configuration. CAUTION Running the UltraSCSI Hub under heavy I/O with Fair Arbitration disabled may result in SCSI bus starvation for hosts with low IDs. 3.
Chapter 3. Using the 16-Bit UltraSCSI Hub Figure 3–1 DWZZH–S5 SCSI ID Assignments C on tro lle r P ort S C S I ID 6-0 H ost P ort S C S I ID 1 3 EK–SMDZS–UG.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) Figure 3-2 DWZZH-09 SCSI ID Assignments Co n trolle r Port SC SI ID 6-0 H ost P ort SC SI ID 1 3 H os t Port S CSI ID 15 Hos t Port SC SI ID 14 Host Port SC SI ID 12 Hos t P ort SCSI ID 11 H o st Po rt SC SI ID 9 H ost Po rt SC SI ID 10 Ho st Po rt S CSI ID 8 S HR-1106 3.3 Front Panel Figures 3-3 and 3-4 show the location of the front panel controls and indicators for the DWZZH-S5 and the DWZZH-09 Hubs.
Chapter 3. Using the 16-Bit UltraSCSI Hub NOTE The black part of the switch in Figure 3-3 indicates the position of the switch. Figure 3–3 DWZZH–S5 Front Panel Fa ir D isa ble P o w er B u sy S H R -10 7 0 EK–SMDZS–UG.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) Figure 3-4 DWZZH-09 Front Panel F a ir D is ab le Fa ir D is a ble P ow er Po w er B us y B us y S H R -1107 3.3.1 Fair ARB Disable The large Hub contains a switch on the front panel that allows the user to disable the Fair ARB feature of the Hub. When Fair ARB is disabled, the Hub services SCSI arbitration cycles in the conventional SCSI priority order.
Chapter 3. Using the 16-Bit UltraSCSI Hub Figure 3–5 DWZZH–S5 SCSI Narrow ID Assignments C on tro lle r P o rt S C S I ID 6-4 H o st P o rt S C S I ID 1 EK–SMDZS–UG.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) Figure 3–6 DWZZH–S5 SCSI Narrow Addressing Jumper W1 (To enable narrow addressing mode, install a jumper at W1 3.4 Determining the Configuration The UltraSCSI Hub is used in end–bus SCSI bus configurations only. The SCSI bus segments require TERMPOWER supplied from the remote connection to enable the SCSI Hub port for that segment. Each port on the UltraSCSI Hub has its own terminators. All SCSI buses are terminated at the physical ends of the bus.
4 Installing the DWZZH-09 Upgrade Kit This chapter gives instructions for installing a DWZZH-09 Upgrade Kit in a DWZZH-S5. It is possible to upgrade a DWZZH-S5, five port Hub to a DWZZH-09, with the purchase and installation of the DWZZH-09 Upgrade Kit. This kit contains (See Figure 4-1): • One DWZZH-A5 5.25" SBB • 0.5m Cable, BN37A-0E • Tri-link, H8861-AA • Bulkhead Cover Figure 4-1 DWZZH-09 Upgrade Kit Contents S H R -1113 EK–SMDZS–UG.
DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable) NOTE If the kit that you received does not include all items listed above, contact your sales representative. 4.1 Install Upgrade 1. Remove DWZZH-A5 SBB from packaging. 2. Remove three bulkhead covers from the right-hand side of the DWZZH-S5 unit. 3. Slide the DWZZH-A5 SBB into the right-hand slots in shelf, where covers were just removed. See Figure 4-2. 4. Install personality card cover in unit. Figure 4-2 Install DWZZH-A5 SBB in Shelf SHR-1114 4.1.
Chapter 4. Installing DWZZH-09 Upgrade Kit Figure 4-3 Attach Tri-link to Cable SH R-1109 2. Install and secure tri-link in storage port of right-hand SBB. Then install and secure the opposite end of the cable in the storage port of the left hand SBB, Figure 4-4. Figure 4-4 Install Tri-link and Cable in Storage Ports of SBBs SH R-1110 3. Install power cords in power supplies on unit. EK–SMDZS–UG.
5 SWCC and UltraSCSI Hubs This chapter is intended to provide you with important information regarding the use of StorageWorks Command Console on SCSI buses that have an UltraSCSI Hub. While the information provided here is important, it is essential that you have read the SWCC Manual and Release Notes. 5.1 Agents and Storage It is highly recommended that you only run one SWCC agent on one of the servers that can access a particular storage subsystem behind the DS-DWZZH-09 UltraSCSI Hub.
DWZZH 16-Bit UltraSCSI HUB (Rack-Mountable) 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.
A Removable Parts of the DWZZH-S5 and DWZZH-09 This Appendix identifies the parts that can be removed and replaced from the DWZZH-S5/-09 16-Bit UltraSCSI Rack-mountable Hubs. The following lists and illustrations identify the removable parts of the DWZZH-S5 and DWZZH-09 Hubs and are intended for reference purposes. See Figures A-1 and A-2. Table A-1 Removable Parts of the DWZZH-S5 Part Number DS-DWZZH-05 DS-BA35X-HH DS-BA356-SG Description UltraSCSI Hub Assy., 0SE & 5 Diff.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) Figure A-1 Removable Parts of the DWZZH-S5 S H R -1111 Figure A-2 Removable Parts of the DWZZH-09 S H R -111 2 A–2 EK–SMDZS–UG.
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 this manual and that may be unfamiliar to the reader. adapter See SCSI bus converter. building block shelf See SBB shelf. controller A hardware/firmware device that manages communications on behalf of host systems over the SCSI bus to devices, such as the HSC-series, HSJ-series, and HSZ-series controllers.
DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable) initiator A SCSI device that requests another device on the bus to perform an operation. Any device on the bus can be an initiator or a target. logical bus A single-ended, physical bus connected to a differential, physical bus by a SCSI bus converter. personality module The BA356 module that interfaces the SCSI-bus to the BA356 shelf. physical bus Two SCSI terminators separated by cables, connectors, and/or the backplane circuitry.
Glossary SCSI cable A 68-conductor (34 twisted pairs) cable used for differential bus connections. single-ended SCSI bus A bus in which each signal’s logic level is determined by the voltage of a single wire in relation to ground. Small Computer System Interface See SCSI. StorageWorks The Compaq set of enclosure products that allows customers to design and configure their own storage subsystem. Components include power, packaging, and interconnections in a StorageWorks shelf.
