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ATTO Technology, Inc.
ATTO SCSI Sidekick
Single-Ended to Single-Ended (USUS) &
Differential to Single-Ended (UDUS)
User's Manual
Copyright © 1997 ATTO Technology, Incorporated. All rights reserved. All brand or product names
are trademarks of their respective holders. No part of this manual may be reproduced in any form or
by any means without the expressed written permission of ATTO Technology, Inc.
Rev. 11/97
Document Control Number: PRMA - 0150- 000MD
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Table of Contents
Related Manuals for ATTO Technology SCSI Sidekick
Summary of Contents for ATTO Technology SCSI Sidekick
- Page 1 Differential to Single-Ended (UDUS) User’s Manual Copyright © 1997 ATTO Technology, Incorporated. All rights reserved. All brand or product names are trademarks of their respective holders. No part of this manual may be reproduced in any form or by any means without the expressed written permission of ATTO Technology, Inc.
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Page 3: Table Of Contents
ABLE ONTENTS Chapter 1: Welcome................1 Unpacking ....................1 About This Manual..................1 What is ATTO SCSI Sidekick?..............1 SCSI Converter ..................1 SCSI Bus Extender ..................1 SCSI Bus Isolator ..................2 ATTO SCSI Sidekick .................. 2 Plug and Play ..................... 2 Chapter 2: Theory of Operation ............3... -
Page 5: Chapter 1: Welcome
SCSI devices on the same SCSI domain. SCSI Bus Extender ATTO SCSI Sidekick also serves as a SCSI bus extender providing you with the ability to extend your SCSI cable lengths. ATTO SCSI Sidekick receives and regenerates the ATTO SCSI Sidekick (USUS/UDUS) User’s Manual... -
Page 6: Scsi Bus Isolator
SCSI Bus Isolator ATTO SCSI Sidekick also has the ability to isolate the SCSI bus. In many workgroup environments, the entire system is forced to shut down to remove a SCSI device. In the event you need to upgrade or remove a device from the system, ATTO SCSI Sidekick allows you to disconnect the device from the host without interruption or downtime. -
Page 7: Chapter 2: Theory Of Operation
SCSI ID. This frees all of the SCSI IDs for devices connected to your system. One of the main features of ATTO SCSI Sidekick is that it allows you to combine differential and single-ended devices on a SCSI domain. By segmenting the SCSI bus and regenerating the SCSI signal, you can mix single-ended and differential SCSI devices on a SCSI domain. -
Page 8: Chapter 3: Cable And Termination
SCSI device chain. The devices at both ends of any SCSI chain must be terminated in order for the SCSI bus to function correctly. To terminate your ATTO SCSI Sidekick simply place a terminator on the open port on each side of the unit. Be sure to use a single-ended terminator on the single-ended side of the unit and a differential terminator on the differential side of the unit. -
Page 9: Chapter 4: Hardware Installation
Terminate the upper port on the same side of the ATTO SCSI Sidekick. Connect the lower connector on the other side of the ATTO SCSI Sidekick to the SCSI device. (If the SCSI device is differential, be sure to connect it to the differential side of the ATTO SCSI Sidekick.) - Page 10 UltraSCSI limitations. ATTO’s Differential to Single-Ended ATTO SCSI Sidekick allows for you to combine differential and single-ended devices on a SCSI domain. Notice that the distance between the host computer and ATTO SCSI Sidekick (25 meters for differential interface) is different from the distance between the ATTO SCSI Sidekick and the device (1.5 meters for single-ended interface).
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Page 11: Chapter 5: Troubleshooting
Chapter 3. Improper termination can be the cause of many problems. • Verify that all of the devices attached to the ATTO SCSI Sidekick have unique SCSI IDs. Remember that the ATTO SCSI Sidekick does NOT occupy a SCSI ID. -
Page 12: Appendix A: Radio & Television Interference
The equipment described in this manual generates and uses radio frequency energy. If the ATTO SCSI Sidekick is not installed and used properly, that is, in strict accordance with the manufacturer’s instruction, it may cause interference with radio and television reception. -
Page 13: Appendix B: Specifications
Humidity ..........10-90% Non-condensing Length ............ 4.625” Width ............. 4.500” Height ............ 1.875” Power Requirements: DC ............ +5V @ 2A, (USUS) +5V @ 3A, (UDUS) AC............. +110V Operating Environments • OS Independent ATTO SCSI Sidekick (USUS/UDUS) User’s Manual Page 9... -
Page 14: Appendix C: Sample Configurations
AMPLE ONFIGURATIONS In addition to extended cable lengths, ATTO SCSI Sidekick also expands configuration options by allowing users to: place a "full load" of devices on both sides, mix 8-bit and 16-bit devices, or connect single-ended and differential devices on the same bus. - Page 15 For drive towers, ATTO SCSI Sidekick allows the maximum number of devices - with extended cable lengths, and without signal degradation or loss: Figure C-2: ATTO SCSI Sidekick With Tower Configurations ATTO SCSI Sidekick (USUS/UDUS) User’s Manual Page 11...
- Page 16 By cascading ATTO SCSI Sidekick, you help eliminate downtime by connecting additional storage devices to a host without the UltraSCSI device limitation and cabling hassles. If you wish to upgrade your storage or a storage device fails and you need to take it off-line, the isolate switch allows you to remove it without disrupting your work.
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Page 17: Appendix D: Ultrascsi Limitations
Due to the electrical noise incurred with high-speed data transfer rates, UltraSCSI has cabling and device limitations. ATTO SCSI Sidekick was engineered to address this issue. Using a ATTO SCSI Sidekick in your configuration will help eliminate the cabling and device limitations. -
Page 18: Appendix E: Atto's Product Line
• ATTO ExpressRAID Fibre Channel Solutions Fibre Channel Host Adapters • ATTO ExpressPCI FC Family Fibre Channel Hub • ATTO AccelNet FC Fibre Channel Bridge & Converter • ATTO FibreBridge RAID Software • ATTO ExpressRAID Page 14 ATTO Technology, Inc. -
Page 19: How To Contact Atto Technology, Inc
Amherst, New York 14228 (716) 691-1999 • voice (716) 691-9353 • fax (716) 691-9403 • BBS http://www.attotech.com ATTO Technology can also be reached via e-mail at the following addresses: Sales Support: sls@attotech.com Technical Support: techsupp@attotech.com ATTO SCSI Sidekick (USUS/UDUS) User’s Manual... - Page 20 Page 16 ATTO Technology, Inc.