Related Manuals for Black Box SCSI Switch II
Summary of Contents for Black Box SCSI Switch II
- Page 1 © Copyright 1996. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...
- Page 2 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) SUPPORT FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
- Page 3 SCSI SWITCH II TRADEMARKS USED IN THIS MANUAL UL is a registered trademark of Underwriters Laboratories Incorporated. All applied-for and registered trademarks are the property of their respective owners.
- Page 4 FCC STATEMENT FEDERAL COMMUNICATIONS COMMISSION INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is...
- Page 5 SCSI SWITCH II NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
- Page 6 NOM STATEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.
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Page 7: Table Of Contents
SCSI SWITCH II Contents Chapter Page 1. Specifications ..................... 7 2. Introduction ....................8 2.1 The Complete Package ............... 8 2.2 Description ..................9 2.3 Caring for the Switch ................ 10 3. Installation ....................11 3.1 Preinstallation Guidelines ..............11 3.2 Installing the Switch ................ -
Page 8: Specifications
CHAPTER 1: Specifications 1. Specifications ® , CSA, FCC Part A, CE Compliance — Protocol — Synchronous and asynchronous Standards — SCSI-1, SCSI-2, and SCSI-3 Interface — Single-ended Termination — All branches must be terminated externally SCSI ID — None User Controls —... -
Page 9: Introduction
The SCSI Switch II is a SCSI-bus-sharing switch that connects multiple combinations of host and target devices to each other. In situations in which more than one user want to share a SCSI device, the SCSI Switch II eliminates the hazards associated with “hot-swapping” bus cables: Instead of users shutting down a system to plug and unplug cables, the SCSI Switch II switches the SCSI bus between them cleanly and safely. -
Page 10: Description
CHAPTER 2: Introduction 2.2 Description With the SCSI Switch II, you can switch between one “main” SCSI bus and three “branches.” Both the main bus and the branch buses may have any combination of SCSI initiators (host computers) and targets (disk drives, scanners, tape drives, etc). -
Page 11: Caring For The Switch
SCSI SWITCH II 2.3 Caring for the Switch The SCSI Switch II is a completely electronic switch. It has been designed for durability and ease of maintenance, but some care should be taken when handling it. Please do not expose the Switch to high humidity or extreme electrical fields. -
Page 12: Installation
Pin 1 on the cable’s connector goes to Pin 1 on the Switch’s connector. 3.2 Installing the Switch To set up the SCSI Switch II on a desktop or otherwise outside of a system cabinet, follow these steps: 1. Find a clear, uncluttered location away from obvious dangers, such as liquids and high temperatures. -
Page 13: Operation
(labeled Ports A, B, and C) on the SCSI Switch II’s front panel. When you select a new branch, the SCSI Switch II waits to connect to the new branch until it is safe to disconnect from the old branch (data transmission to and from the old branch has stopped). -
Page 14: Troubleshooting
CHAPTER 5: Troubleshooting 5. Troubleshooting If you encounter a problem when you install or operate the SCSI Switch II, please review this section for likely causes and what to do if you eliminate these possibilities but the problem remains. 5.1 Common Problems Problem 1. - Page 15 Problem 3. SCSI Switch II appears to be working, but SCSI device does not respond properly to system: If possible, remove the SCSI Switch II. Then, if the device with the problem is on a branch bus, connect that branch directly to the main bus; if the problem device is on the main bus, either terminate the unterminated end of the main bus or connect the main bus to one of the three branch segments.
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Page 16: Contacting Your Supplier
CHAPTER 5: Troubleshooting 5.2 Contacting Your Supplier If your SCSI Switch II seems to be malfunctioning, do not attempt to alter or repair the unit. Call your supplier. The problem may be solvable over the phone. Before you call, make a record of the history of the problem. Your supplier... -
Page 17: Technical Details
The SCSI Switch II acts as a pass-through switch and introduces no unusual termination effects, so when you plan a system with the SCSI Switch II and three branch buses without independently operating SCSI initiators, handle termination as if the SCSI Switch II is simply another connector. If a branch bus won’t be operating while it’s disconnected from the main bus—it has only... -
Page 18: Termination Exceptions
Normally, termination should be placed at the two very ends of a SCSI bus. For a SCSI Switch II system, this means one terminator at the end of the main bus and one at the end of each branch bus. But if an unselected branch bus can operate on its own, then it must have termination at both of its ends. - Page 19 SCSI rules. This is also not the intended use of the SCSI Switch II. The Switch is designed to support “dead” branches only, in conformance with the nature of the SCSI bus.