User Manual
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C (Page A-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740/2742 Single-Channel AHA-2740T/2742T TwinChannel™ EISA-to-Fast SCSI Host Adapters User's Manual Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
C (Page A-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740/2742 Single-Channel AHA-2740T/2742T TwinChannel™ EISA-to-Fast SCSI Host Adapters User's Manual Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
User Manual
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Printed in Singapore STOCK NO.: 510381-00 Rev. C (Page A-2) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 C LL 9/93 Information subject to change without notice. All rights reserved. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Adaptec and the Adaptec logo are registered trademarks of Adaptec, Inc. Adaptec, Inc. 691 South Milpitas Boulevard Milpitas, CA 95035 Copyright © 1993, Adaptec, Inc.
Printed in Singapore STOCK NO.: 510381-00 Rev. C (Page A-2) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 C LL 9/93 Information subject to change without notice. All rights reserved. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Adaptec and the Adaptec logo are registered trademarks of Adaptec, Inc. Adaptec, Inc. 691 South Milpitas Boulevard Milpitas, CA 95035 Copyright © 1993, Adaptec, Inc.
User Manual
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C (Page 0-i) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740/2742 Single-Channel AHA-2740T/2742T TwinChannel™ EISA-to-Fast SCSI Host Adapters User's Manual v v v v v v v v v v v v Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
C (Page 0-i) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740/2742 Single-Channel AHA-2740T/2742T TwinChannel™ EISA-to-Fast SCSI Host Adapters User's Manual v v v v v v v v v v v v Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
User Manual
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... design without reservation and without the prior written consent of Iomega Corporation. Adaptec and the Adaptec logo are registered trademarks, and AHA, TwinChannel, and PhaseEngine are registered trademarks of this manual to its accuracy, Adaptec, Inc. No part of International Business Machines Corporation. IBM, OS/2, AT...ii) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 MS-DOS is a registered trademark of Adaptec, Inc., 691 South Milpitas Blvd., Milpitas, CA 95035. ii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
... design without reservation and without the prior written consent of Iomega Corporation. Adaptec and the Adaptec logo are registered trademarks, and AHA, TwinChannel, and PhaseEngine are registered trademarks of this manual to its accuracy, Adaptec, Inc. No part of International Business Machines Corporation. IBM, OS/2, AT...ii) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 MS-DOS is a registered trademark of Adaptec, Inc., 691 South Milpitas Blvd., Milpitas, CA 95035. ii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
User Manual
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... dealer or an experienced radio/television technician for a Class B digital device, pursuant to Part 15 of the FCC rules. iii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. If this device must have shielded interface cables. Finally, any interference received..., including interference that may cause harmful interference to radio communications. Each AHA-2740 Series host adapter is equipped with the limits for additional suggestions CAUTION: Only equipment certified to comply with part 15 of...
... dealer or an experienced radio/television technician for a Class B digital device, pursuant to Part 15 of the FCC rules. iii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. If this device must have shielded interface cables. Finally, any interference received..., including interference that may cause harmful interference to radio communications. Each AHA-2740 Series host adapter is equipped with the limits for additional suggestions CAUTION: Only equipment certified to comply with part 15 of...
User Manual
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... About This Chapter 1-1 Overview 1-3 The AHA-2740 Series of Host Adapters 1-3 Features 1-4 Fast Data Transfer Rates 1-4 Maximum Off-loading the Host CPU 1-4 Fully Disk Array Capable 1-5 Advanced Fast SCSI-2 Implementation 1-5 Multiple Device and Applications Support 1-5 Board Layout 1-6 Default Settings 1-7 The On-board Floppy Controller (AHA-2742/2742T Only 1-8 Unpacking and Inspection 1-8 Adaptec Technical Support 1-9 2 Getting Started About This...
... About This Chapter 1-1 Overview 1-3 The AHA-2740 Series of Host Adapters 1-3 Features 1-4 Fast Data Transfer Rates 1-4 Maximum Off-loading the Host CPU 1-4 Fully Disk Array Capable 1-5 Advanced Fast SCSI-2 Implementation 1-5 Multiple Device and Applications Support 1-5 Board Layout 1-6 Default Settings 1-7 The On-board Floppy Controller (AHA-2742/2742T Only 1-8 Unpacking and Inspection 1-8 Adaptec Technical Support 1-9 2 Getting Started About This...
User Manual
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...Physical Interface A-8 Connector A-8 vi Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 0-vi) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740 Series User's Manual SCSI Bus Activity LED Connector 2-14 ...19 Utilities 3-19 Disk Format Utility 3-20 Host Adapter Diagnostic Utility 3-21 4 Troubleshooting About This Chapter 4-1 SCSI Troubleshooting Checklist 4-3 Problems and Solutions 4-4 Conflicts With Other Options 4-7 APPENDICES A Specifications About This Appendix A-1 Technical Information A-3 Product...
...Physical Interface A-8 Connector A-8 vi Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 0-vi) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 AHA-2740 Series User's Manual SCSI Bus Activity LED Connector 2-14 ...19 Utilities 3-19 Disk Format Utility 3-20 Host Adapter Diagnostic Utility 3-21 4 Troubleshooting About This Chapter 4-1 SCSI Troubleshooting Checklist 4-3 Problems and Solutions 4-4 Conflicts With Other Options 4-7 APPENDICES A Specifications About This Appendix A-1 Technical Information A-3 Product...
User Manual
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... C Current Date: 9/1/93 ECN Date: 9/14/93 D-5 Glossary About This Glossary Glossary-1 Glossary Glossary-3 Index Index-1 vii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Table of Contents B I/O Operating Environment About This Appendix B-1 Host ...Windows B-3 C Optimizing Performance About This Appendix C-1 Performance Tips C-3 Enabling Synchronous Negotiation C-3 Disabling the Host Adapter BIOS C-3 Enabling SCSI Bus Parity C-4 Setting Enable Disconnection C-4 Send Start Unit Command C-4 DOS/Windows Performance C-5 D Disk Drives Over 1 Gigabyte About...
... C Current Date: 9/1/93 ECN Date: 9/14/93 D-5 Glossary About This Glossary Glossary-1 Glossary Glossary-3 Index Index-1 vii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Table of Contents B I/O Operating Environment About This Appendix B-1 Host ...Windows B-3 C Optimizing Performance About This Appendix C-1 Performance Tips C-3 Enabling Synchronous Negotiation C-3 Disabling the Host Adapter BIOS C-3 Enabling SCSI Bus Parity C-4 Setting Enable Disconnection C-4 Send Start Unit Command C-4 DOS/Windows Performance C-5 D Disk Drives Over 1 Gigabyte About...
User Manual
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... 2-10 Figure 2-5. Connecting External Cable to Floppy Drive . . . 2-22 Figure 2-14. Connecting Multiple External SCSI Devices. 2-20 Figure 2-12. Connecting a Second Floppy Drive 2-22 Figure 3-1. Selecting Host Adapter SCSI ID 3-9 Figure 3-7. Configuring SCSI Bus Termination 3-12 Figure 3-11. BIOS Configuration Selection 3-13 Figure 3-13. SCSI Device Configuration 3-15 Figure 3-14. Utility Selection 3-20 viii Adaptec AHA-2740 Series...
... 2-10 Figure 2-5. Connecting External Cable to Floppy Drive . . . 2-22 Figure 2-14. Connecting Multiple External SCSI Devices. 2-20 Figure 2-12. Connecting a Second Floppy Drive 2-22 Figure 3-1. Selecting Host Adapter SCSI ID 3-9 Figure 3-7. Configuring SCSI Bus Termination 3-12 Figure 3-11. BIOS Configuration Selection 3-13 Figure 3-13. SCSI Device Configuration 3-15 Figure 3-14. Utility Selection 3-20 viii Adaptec AHA-2740 Series...
User Manual
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...: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 External Connector Pin Assignments A-7 Table A-6. SCSI Device and AHA Configuration 2-9 Table A-1. Table of Contents List of Tables Table 1-1. Output Signals A-4 Table A-3. Output and Input Signals A-8 ix Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Host Adapter Default Settings 1-7 Table 2-1. Input Signals A-5 Table...
...: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 External Connector Pin Assignments A-7 Table A-6. SCSI Device and AHA Configuration 2-9 Table A-1. Table of Contents List of Tables Table 1-1. Output Signals A-4 Table A-3. Output and Input Signals A-8 ix Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Host Adapter Default Settings 1-7 Table 2-1. Input Signals A-5 Table...
User Manual
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..., provides general information about the Adaptec AHA-2740 Series of the host adapter and its connectors, which allows you how to contact Adaptec Technical Support. Appendix B, I /O Operating Environment Software is used to configure your host adapter. Appendix C, Optimizing Performance, has various tips on maximizing the performance of EISA-to-Fast SCSI Host Adapters. Chapter 2, Getting Started...
..., provides general information about the Adaptec AHA-2740 Series of the host adapter and its connectors, which allows you how to contact Adaptec Technical Support. Appendix B, I /O Operating Environment Software is used to configure your host adapter. Appendix C, Optimizing Performance, has various tips on maximizing the performance of EISA-to-Fast SCSI Host Adapters. Chapter 2, Getting Started...
User Manual
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... in (.. Conventions The following typographic conventions are used for acronyms, such as shown ( .. select Backup Device and ..). Hexadecimal Numbers Are followed by an 'h', e.g., 330h. xii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. The Index helps you must be typed exactly as SCSI and CD-ROM.
... in (.. Conventions The following typographic conventions are used for acronyms, such as shown ( .. select Backup Device and ..). Hexadecimal Numbers Are followed by an 'h', e.g., 330h. xii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. The Index helps you must be typed exactly as SCSI and CD-ROM.
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... advisory is a visual alarm. WARNING This type of advisory could result in damage to observe this type of a potential hazard to the user. Ì xiii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Caution Failure to your system, devices, and/or data. C (Page 0-xiii) Print Spec Number: 491709-00 Rev...
... advisory is a visual alarm. WARNING This type of advisory could result in damage to observe this type of a potential hazard to the user. Ì xiii Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Caution Failure to your system, devices, and/or data. C (Page 0-xiii) Print Spec Number: 491709-00 Rev...
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C (Page 1-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 1-1 1 Introduction About This Chapter Read this chapter to find out: • An overview of the AHA-2740 Series of EISA-to-Fast SCSI host adapters • The features of the AHA-2740 Series • The layout of the host adapter and all its major components • The default settings of the host adapter and how to disable or enable the on-board floppy controller • How to get help from Adaptec Technical Support Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
C (Page 1-1) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 1-1 1 Introduction About This Chapter Read this chapter to find out: • An overview of the AHA-2740 Series of EISA-to-Fast SCSI host adapters • The features of the AHA-2740 Series • The layout of the host adapter and all its major components • The default settings of the host adapter and how to disable or enable the on-board floppy controller • How to get help from Adaptec Technical Support Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev.
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...AHA-2740 and AHA-2742 support a single SCSI channel (SCSI Channel A), while the AHA-2740T and AHA-2742T support Adaptec's TwinChannel (SCSI Channel A and SCSI Channel B) architecture. The AHA-2740 Series of data transfer available for all four host adapters are referred to as the AHA-2740/2742 host adapter; These transfers are the same except when regarding the on-board floppy controller...configure the AHA™-2740 and AHA-2742 single-channel, and the AHA-2740T and AHA-2742T TwinChannel™ EISA-to-Fast SCSI host adapters in multi-tasking operating systems. Adaptec AHA-2740 Series ...
...AHA-2740 and AHA-2742 support a single SCSI channel (SCSI Channel A), while the AHA-2740T and AHA-2742T support Adaptec's TwinChannel (SCSI Channel A and SCSI Channel B) architecture. The AHA-2740 Series of data transfer available for all four host adapters are referred to as the AHA-2740/2742 host adapter; These transfers are the same except when regarding the on-board floppy controller...configure the AHA™-2740 and AHA-2742 single-channel, and the AHA-2740T and AHA-2742T TwinChannel™ EISA-to-Fast SCSI host adapters in multi-tasking operating systems. Adaptec AHA-2740 Series ...
User Manual
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... are of the SCSI drives on -board floppy controller. Like all SCSI protocol • Low SCSI processing overhead • Bus master DMA implementation • Task scheduling and message-based communication • Programmable interrupts • 32-, 16-, and 8-bit host bus data transfer 1-4 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. however, the AHA-2742/2742T...
... are of the SCSI drives on -board floppy controller. Like all SCSI protocol • Low SCSI processing overhead • Bus master DMA implementation • Task scheduling and message-based communication • Programmable interrupts • 32-, 16-, and 8-bit host bus data transfer 1-4 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. however, the AHA-2742/2742T...
User Manual
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... array vendors Advanced Fast SCSI-2 Implementation • Concurrent support of Fast SCSI, synchronous and asynchronous devices • Concurrent support of both standard and Fast SCSI devices • Scatter/Gather operation • Simultaneous Target/Initiator • Fully multitasking/multithreading • Uses the superior SCSI-2 (Alternative 1) ... AHA-2740/2742 can be used to install up to seven SCSI devices • The AHA-2740T/2742T can be used to install up to 14 SCSI devices • The AHA-2742/2742T can be used to install up to two floppy diskette drives 1-5 Adaptec AHA-2740 ...
... array vendors Advanced Fast SCSI-2 Implementation • Concurrent support of Fast SCSI, synchronous and asynchronous devices • Concurrent support of both standard and Fast SCSI devices • Scatter/Gather operation • Simultaneous Target/Initiator • Fully multitasking/multithreading • Uses the superior SCSI-2 (Alternative 1) ... AHA-2740/2742 can be used to install up to seven SCSI devices • The AHA-2740T/2742T can be used to install up to 14 SCSI devices • The AHA-2742/2742T can be used to install up to two floppy diskette drives 1-5 Adaptec AHA-2740 ...
User Manual
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...Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 1-6) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 J1 U1 J2 U2 J4 J3 U5 PIN 1 PIN 1 PIN 1 J5 U9 U10 J6 Figure 1-1. Table 1-1 provides a description of the major components on the host adapter; AHA-2740... Series User's Manual • The AHA-2740 Series BIOS fully supports the extended parti- tioning capabilities of DOS 3.3 for up to two drives and ...
...Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 1-6) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 J1 U1 J2 U2 J4 J3 U5 PIN 1 PIN 1 PIN 1 J5 U9 U10 J6 Figure 1-1. Table 1-1 provides a description of the major components on the host adapter; AHA-2740... Series User's Manual • The AHA-2740 Series BIOS fully supports the extended parti- tioning capabilities of DOS 3.3 for up to two drives and ...
User Manual
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...Components Description External LED Connector Floppy Connector (AHA-2742/2742T only) SCSI Channel A Internal Connector Floppy Enable Jumper (AHA-2742/2742T only) SCSI Channel B Internal Connector (AHA-2740T/2742T only) SCSI Channel A External Connector Floppy Controller (AHA-2742/2742T only) RAM Host Adapter ... 256 milliseconds Enabled Enabled Enabled Disabled Boot Device Only 1-7 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Refer to Chapter 3, Configuring the Host Adapter for information on SCSI Bus Termination Extended Translation for the majority of your host ...
...Components Description External LED Connector Floppy Connector (AHA-2742/2742T only) SCSI Channel A Internal Connector Floppy Enable Jumper (AHA-2742/2742T only) SCSI Channel B Internal Connector (AHA-2740T/2742T only) SCSI Channel A External Connector Floppy Controller (AHA-2742/2742T only) RAM Host Adapter ... 256 milliseconds Enabled Enabled Enabled Disabled Boot Device Only 1-7 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. Refer to Chapter 3, Configuring the Host Adapter for information on SCSI Bus Termination Extended Translation for the majority of your host ...
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...your existing floppy controller; C (Page 1-8) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Before handling the host adapter, always ground yourself by touching the system chassis of damage, return the host adapter to your computer. 1-8 Adaptec AHA-2740 Series User's... for any damage incurred during storage or shipment. In case of your distributor; AHA-2740 Series User's Manual The On-board Floppy Controller (AHA-2742/2742T Only) The on-board floppy controller on the AHA-2742/2742T is enabled by default and is controlled by Jumper J4. •...
...your existing floppy controller; C (Page 1-8) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 Before handling the host adapter, always ground yourself by touching the system chassis of damage, return the host adapter to your computer. 1-8 Adaptec AHA-2740 Series User's... for any damage incurred during storage or shipment. In case of your distributor; AHA-2740 Series User's Manual The On-board Floppy Controller (AHA-2742/2742T Only) The on-board floppy controller on the AHA-2742/2742T is enabled by default and is controlled by Jumper J4. •...