User’s Guide AHA-2740W/2742W/2744W EISA-to-Fast, Wide SCSI Host Adapters R A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W A AA A A Stock Number: 510647-00, Rev.
Adaptec, Inc. 691 South Milpitas Boulevard Milpitas, CA 95035 Copyright © 1993, 1994, Adaptec, Inc. All rights reserved. Adaptec and the Adaptec logo are registered trademarks of Adaptec, Inc. Printed in Singapore STOCK NO.: 510647-00, Rev. A LL 08/94 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W A AA A A Stock Number: 510647-00, Rev.
▼ ▼ ▼ ▼ AHA-2740W/2742W/2744W EISA-to-Fast, Wide SCSI Host Adapters User’s Guide R A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
Copyright Copyright © 1993, 1994 Adaptec, Inc. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Adaptec, Inc., 691 South Milpitas Blvd., Milpitas, CA 95035. Trademarks Adaptec, the Adaptec logo, AHA, and PhaseEngine are registered trademarks and EZ-SCSI is a trademark of Adaptec, Inc.
Ordering Software and Cables To order Adaptec software and SCSI cables, call 800-442-SCSI (7274), M–F: 6:00 a.m. to 5:00 p.m., Pacific Time. If you are calling from outside the U.S. and Canada, the number is 408-957-SCSI (7274). Literature Hotline To request additional documentation for Adaptec products, call 800-934-2766, M–F: 5:00 a.m. to 6:00 p.m., Pacific Time.
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▼ ▼ ▼ ▼ Table of Contents Preface Inside This Document xi Conventions xii Advisories xiii 1 Introduction About This Chapter 1-1 Overview 1-3 The AHA-2740W/2742W/2744W 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 1-4 Advanced Fast SCSI-2/SCSI-3 Implementation 1-4 Multiple Device and Applications Support 1-5 Configuration Flexibility 1-5 Board Layout 1-6 Default Settings 1-8 The Onboard Floppy Controller (AHA-2742W and AHA-2744W On
AHA-2740W/2742W/2744W User’s Guide 68-pin Internal Connector Only 2-12 68-pin External Connector Only 2-12 68-pin Internal and 68-pin External Connectors 2-13 50-pin Internal Connector Only 2-13 50-pin and 68-pin Internal Connectors 2-14 50-pin Internal and 68-pin External Connectors 2-14 50-pin and 68-pin Internal Connectors, and 68-pin External Connector 2-15 SCSI ID Setting 2-15 Installing the Host Adapter 2-16 Cabling the Host Adapter 2-17 Connecting Standard 8-bit Internal SCSI Devices 2-17 Connecting
Table of Contents Host Adapter SCSI ID 3-8 SCSI Bus Parity Check 3-9 SCSI Selection Timeout 3-10 SCSI Bus Reset at Power-on 3-10 SCSI Bus Termination (AHA-2740W and AHA-2742W Only) 3-11 BIOS and Device Configuration 3-11 BIOS Configuration 3-12 Device Configuration 3-13 Exit SCSI Device Configuration 3-18 Exit the EISA Configuration Utility 3-18 Utilities 3-18 Disk Format Utility 3-19 Disk Format 3-19 Disk Verify 3-19 4 Troubleshooting About This Chapter 4-1 SCSI Troubleshooting Checklist 4-3 Problems and
AHA-2740W/2742W/2744W User’s Guide 50-pin SCSI Connector A-6 68-pin SCSI Connectors A-6 Floppy Disk Interface A-11 Standard Electronic and Physical Interface A-11 Connector A-11 B I/O Operating Environment About This Appendix B-1 Host Adapter Support B-3 DOS/Windows B-3 Adaptec EZ-SCSI B-4 C Optimizing Performance About This Appendix C-1 Performance Tips C-3 Enabling Synchronous Negotiation C-3 Enabling Wide Negotiation C-3 Disabling the Host Adapter BIOS C-4 Enabling SCSI Bus Parity C-4 Setting Enable D
▼ ▼ ▼ ▼ List of Figures Figure 1-1 Board Layout for the AHA-2740W and AHA-2742W 1-6 1-2 Board Layout for the AHA-2744W 1-7 2-1 2-2 Connectors on the Host Adapter 2-8 2-3 2-4 2-5 2-6 2-7 2-8 2-9 2-10 2-11 Pin-1 Orientation on Resistor Networks 2-11 2-12 2-13 2-14 Connecting a Second Internal SCSI Device 2-20 2-15 2-16 2-17 2-18 Connecting a Second Internal Wide SCSI Device 2-22 2-19 2-20 34-pin Floppy Cable to Host Adapter 2-25 Location of Resistor Networks on the AHA-2744W 2-10 Internal Wid
AHA-2740W/2742W/2744W User’s Guide Figure 2-21 2-22 Connecting a Second Floppy Drive 2-26 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 3-9 3-10 3-11 3-12 3-13 3-14 3-15 3-16 Host Adapter Parameters 3-4 SCSI LED Connector 2-27 Interrupt Level Selection 3-5 Bus Release Time Selection 3-6 Data FIFO Threshold Selection 3-6 Host Adapter BIOS Base Address Selection 3-7 Wide SCSI Channel Interface Definitions 3-8 Host Adapter SCSI ID Selection 3-9 SCSI Bus Parity Check Selection 3-9 SCSI Selection Timeout Selection 3-10
▼ ▼ ▼ ▼ Preface Inside This Document This document provides complete instructions on how to install and use the Adaptec AHA-2740W/2742W/ 2744W EISA-to-Fast, Wide SCSI Host Adapters. Chapter 1 Introduction provides general information about the AHA-2740W/2742W/2744W host adapters. The features, board layout, and default settings are included. Chapter 2 Getting Started has the information needed to install the host adapter and SCSI devices.
AHA-2740W/2742W/2744W User’s Guide Appendix C Optimizing Performance has various tips on maximizing the performance of your host adapter. Appendix D Disk Drives Over 1 GByte describes Adaptec's extended translation feature which allows you to bypass the DOS 1024 cylinder limit, and supports disk drives up to 8 Gigabytes (GBytes) in size. Conventions The following typographic conventions are used throughout this document. bold Used for keystrokes (.. press the Enter key ..
Preface Advisories Advisories are quick notes that stress an important point or warn of a potential hazard to your system or your data. This document uses three types of advisories: Note: Text set off in this way presents reminders, tips, or suggestions which may simplify the assembly and use of the host adapter. Caution: Failure to observe this type of advisory could result in damage to your system, devices, and/or data. WARNING: Failure to observe this type of advisory could result in personal injury.
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▼ ▼ ▼ ▼ 1 Introduction About This Chapter Read this chapter to find out ■ An overview of the AHA-2740W/2742W/ 2744W EISA-to-Fast SCSI host adapters ■ The features of the AHA-2740W/2742W/ 2744W ■ 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 onboard floppy controller on the AHA-2742W and AHA-2744W 1-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA
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Introduction ▼ ▼ ▼ ▼ 1 Overview This document provides information on how to install and configure the AHA-2740W, AHA-2742W, and AHA-2744W EISA-toFast, Wide SCSI host adapters in an EISA computer system. The AHA-2740W, AHA-2742W and AHA-2744W support 16-bit Wide SCSI via a 68-pin cable. In addition, a 50-pin cable connector is provided to connect 8-bit SCSI devices. The AHA-2742W and AHA-2744W contain an onboard floppy controller.
AHA-2740W/2742W/2744W User’s Guide Like all EISA I/O cards, the AHA-2740W/2742W/2744W does not have jumpers to change various EISA configuration options. These options are changed via the EISA configuration utility provided with every EISA system; however, the AHA-2742W and AHA-2744W do have a single jumper (J1) that is used to enable or disable the onboard floppy controller.
Introduction ■ Concurrent support of Fast SCSI, synchronous and asynchronous devices ■ Concurrent support of both standard and Fast SCSI devices ■ Scatter/Gather operation ■ Fully multitasking/multithreading ■ Tagged queuing support ■ Programmable active SCSI termination ■ Multiple LUN support ■ Parity handling in Data, Message, and Command phases Multiple Device and Applications Support ■ The AHA-2740W/2742W/2744W can be used to install up to 15 SCSI devices ■ The AHA-2742W can be used
AHA-2740W/2742W/2744W User’s Guide Board Layout Figure 1-1 shows the location of the major components on the AHA-2740W and AHA-2742W; the table below provides a description of each component. J1 J2 J3 J4 Pin 1 U1 J5 Pin 1 U7 U3 U11 U12 J6 Figure 1-1.
Introduction Figure 1-1 shows the location of the major components on the AHA-2744W; the table below provides a description of each component. J1 J2 J3 J4 Pin 1 U35 J5 Pin 1 U21 U7 U33 U34 J6 Figure 1-2.
AHA-2740W/2742W/2744W User’s Guide Default Settings Your host adapter is already configured for the majority of EISA class computers. The table below lists the default settings of your host adapter. Refer to Chapter 3, Configuring the Host Adapter for information on changing any of the settings.
Introduction Unpacking and Inspection Your host adapter should be undamaged when you receive it. The carrier or distributor where you purchased the host adapter is responsible for any damage incurred during storage or shipment.
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▼ ▼ ▼ ▼ 2 Getting Started About This Chapter Read this chapter to find out ■ An overview of the steps involved in installing your host adapter ■ A brief discussion about your host adapter and the SCSI bus ■ The instructions an experienced user can use to quickly install the host adapter ■ The instructions a user who is new to SCSI, or has limited experience, can use to install the host adapter and SCSI devices 2-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/274
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Getting Started ▼ ▼ ▼ ▼ 2 Installation Overview This chapter provides instructions that guide you through preparing SCSI devices for installation on the SCSI bus, installing the host adapter in the EISA system, connecting the devices to the SCSI bus, cabling and reassembling the system. For experienced users who are already familiar with SCSI and SCSI installation, refer to Quick Installation on page 2-5 for instructions that allow you to get your host adapter up and running quickly.
AHA-2740W/2742W/2744W User’s Guide The Host Adapter and the SCSI Bus The AHA-2740W/2742W/2744W acts on your computer's behalf as the host to your suite of SCSI devices. Each chain of SCSI peripheral devices and their host adapter work together, and is referred to as a SCSI bus. When connecting SCSI devices to the SCSI bus, consider the following: ■ Each AHA-2740W/2742W/2744W installed in your system can be used to form a SCSI bus consisting of up to 15 internal and external SCSI devices.
Getting Started Quick Installation The following installation procedures are intended to help experienced users quickly install the AHA-2740W/2742W/2744W into an EISA computer system. If you are new to computer peripheral installation or would like more information, refer to the more comprehensive instructions and illustrations found in Installation on page 2-8.
AHA-2740W/2742W/2744W User’s Guide Install Your Host Adapter and Peripherals Once the SCSI bus is properly terminated and each SCSI device is set to a unique SCSI ID, you can physically install your host adapter and SCSI devices. WARNING: Turn OFF and disconnect power to the system and external equipment before removing the chassis cover or attempting any motherboard modifications. 1 Turn power OFF, unplug your computer and remove the cover.
Getting Started To connect additional internal Wide SCSI devices, you will need to obtain a 68-pin SCSI ribbon cable with enough 68-pin connectors to accommodate all of your internal Wide SCSI devices. 5 To connect external 16-bit Wide SCSI devices, use a 68-pin shielded cable with 68-pin P-cable connectors to connect the first external Wide SCSI device to the external Wide SCSI connector on the host adapter.
AHA-2740W/2742W/2744W User’s Guide EISA system from the diskette that came with your host adapter to either the bootable ECU diskette or to the directory on your hard disk where the utility is located. 3 Select the option in the ECU that allows you configure the EISA slot in which the host adapter is installed. 4 Configure the host adapter parameters.
Getting Started Termination on the SCSI Bus To reduce signal reflections on the SCSI bus, the device connected at the end of each SCSI connector must have a set of resistors called terminators either installed or enabled. All other SCSI devices installed between the last device and the host adapter must have their terminators either removed or disabled. In addition, termination on the host adapter itself must be properly configured.
AHA-2740W/2742W/2744W User’s Guide For the AHA-2740W and AHA-2742W, host adapter termination is determined by which SCSI connectors have SCSI devices connected, is software selectable only, and is done through your computer’s EISA configuration utility. Refer to Chapter 3, Configuring the Host Adapter for instructions. The table below describes the possible configurations for host adapter termination.
Getting Started Install1 Remove Low High None From RN1 to RN12 OFF OFF ON ON OFF ON RN1, RN2, RN9, RN10, RN11, and RN12 None with 10-pin 330 ohm bussed RNs. RN3, RN4, RN5, RN6, RN7, and RN8 with 10-pin 150 ohm isolated RNs. RN9 and RN12 with 330 ohm bussed RNs. RN1, RN2, RN4, RN5, RN7, RN8, RN10, and RN11 RN3 and RN6 with 150 ohm isolated RNs. 1 RN1, RN2, RN9, RN10, RN11, and RN12 are 330 ohm resistor networks. RN3, RN4, RN5, RN6, RN7, and RN8 are 150 ohm resistor networks.
AHA-2740W/2742W/2744W User’s Guide 68-pin Internal Connector Only When only the 68-pin internal connector has SCSI devices connected, the last SCSI device must be terminated. The host adapter low and high bytes must be set to ON. Host Adapter Termination Low High ON ON Termination Enabled No Termination Figure 2-4. Internal Wide SCSI Devices Only 68-pin External Connector Only When only the 68-pin external connector has SCSI devices connected, the last SCSI device must be terminated.
Getting Started 68-pin Internal and 68-pin External Connectors When both the 68-pin internal and external connectors have SCSI devices connected, the last SCSI device connected to each connector must be terminated. The host adapter low and high bytes must be set to OFF. Host Adapter Termination Low High OFF OFF Termination Enabled No Termination No Termination No Termination Termination Enabled Figure 2-6.
AHA-2740W/2742W/2744W User’s Guide 50-pin and 68-pin Internal Connectors When both the 50-pin and 68-pin internal connectors have SCSI devices connected, the last SCSI device connected to each connector must be terminated. The host adapter low byte must be set to OFF and the high byte set to ON. Host Adapter Termination Low High OFF ON Termination Enabled No Termination No Termination Termination Enabled Figure 2-8.
Getting Started 50-pin and 68-pin Internal Connectors, and 68-pin External Connector This is an invalid setup; only two of the three SCSI connectors can have SCSI devices connected at any one time. Note: Any configuration utilizing all three SCSI connectors will result in an improperly terminated SCSI bus. SCSI ID Setting Each SCSI device (including the host adapter) located on the SCSI bus must be set to a unique SCSI ID.
AHA-2740W/2742W/2744W User’s Guide ■ SCSI ID 1 is best reserved for a second hard disk drive. ■ If you are installing more than one SCSI host adapter, each adapter implements a different SCSI bus, so SCSI IDs can be reused. Changing the SCSI ID setting for the host adapter is software selectable only, and is done through your computer’s EISA configuration utility. Refer to Chapter 3, Configuring the Host Adapter for instructions.
Getting Started Note: EISA boards require firmer seating than typical ISA expansion boards. Make sure the host adapter is fully seated in its slot. Cabling the Host Adapter The AHA-2740W/2742W/2744W has three cable connectors for connecting SCSI devices: two for connecting internal SCSI devices and one for connecting external SCSI devices. The two internal SCSI connectors consist of a 50-pin and 68-pin connector. The single external connector consists of a 68-pin connector.
AHA-2740W/2742W/2744W User’s Guide attached to the remaining connectors. Up to seven internal 8-bit devices can be connected to the 50-pin SCSI connector. Note: Only two of the three SCSI connectors on the AHA-2740W/2742W/2744W can have devices connected at any one time. The total number of SCSI devices that can be connected to the host adapter is 15.
Getting Started 1 Connect one end of the 50-pin SCSI ribbon cable to the 50-pin internal SCSI connector on the host adapter. Colored Stripe 50-pin SCSI Ribbon Cable Pin 1 Internal SCSI Connector Figure 2-10. 50-pin SCSI Ribbon Cable to Host Adapter 2 Connect the other end of the 50-pin SCSI ribbon cable to the SCSI connector on the internal SCSI device. Pin 1 Colored Stripe Internal SCSI Device Figure 2-11.
AHA-2740W/2742W/2744W User’s Guide 3 To connect a second internal SCSI device, plug the middle connector of the SCSI ribbon cable to the SCSI connector on the second internal SCSI device. Pin 1 Colored Stripe To Host Adapter Internal SCSI Device To 1st Internal SCSI Drive Figure 2-12.
Getting Started Note: Only two of the three SCSI connectors on the AHA-2740W/2742W/2744W can have devices connected at any one time. The total number of SCSI devices that can be connected to the host adapter is 15. To connect internal Wide SCSI devices, follow these steps: 1 Connect one end of the 68-pin Wide SCSI ribbon cable to the internal 68-pin Wide SCSI connector on the host adapter. 68-pin Wide SCSI Ribbon Cable Figure 2-13.
AHA-2740W/2742W/2744W User’s Guide 2 Connect the other end of the 68-pin Wide SCSI ribbon cable to the connector on the internal Wide SCSI device. Figure 2-14. 68-pin Internal Cable to Internal Wide SCSI Device 3 To connect two or more internal Wide SCSI devices to a SCSI bus, obtain a 68-pin Wide SCSI ribbon cable with enough connectors to accommodate all of your internal Wide SCSI devices. Connect each Wide SCSI device to the additional connectors.
Getting Started back of the external device allows another cable to connect it with the second device in the chain. Up to 15 external Wide SCSI devices can be connected to the 68-pin external connector. Note: Only two of the three SCSI connectors on the AHA-2740W/2742W/2744W can have devices connected at any one time. The total number of SCSI devices that can be connected to the host adapter is 15.
AHA-2740W/2742W/2744W User’s Guide 2 Connect the other end of the 68-pin external cable to either one of the SCSI connectors on the Wide SCSI device. 68-pin External Wide SCSI Cable External Wide SCSI Device Figure 2-17. 68-pin External Cable to Wide SCSI Device 3 To connect subsequent external Wide SCSI devices, obtain additional external cables and chain each device to the previous device until all external SCSI devices have been connected. 68-pin External Wide SCSI Cables Figure 2-18.
Getting Started Connecting Floppy Drives (AHA-2742W and AHA-2744W Only) Floppy disk drives are connected to the host adapter by a 34-pin floppy ribbon cable with a 34-pin header connector. Up to two floppy diskette drives can be connected to the host adapter. Note: If you are not using the floppy controller on the AHA-2742W and AHA-2744W, be sure to disable it by removing the jumper connector on jumper J1.
AHA-2740W/2742W/2744W User’s Guide 2 Connect the other end of the 34-pin floppy ribbon cable to the connector on the first floppy drive (Drive A). Pin 1 Colored Stripe Floppy Diskette Drive Figure 2-20. 34-pin Floppy Cable to First Floppy Drive 3 To connect a second floppy drive, plug the middle connector of the floppy ribbon cable to the connector on the second floppy drive (Drive B). Pin 1 Colored Stripe To Host Adapter Floppy Diskette Drive To 1st Floppy Drive Figure 2-21.
Getting Started SCSI Bus Activity LED Connector Most computer systems have a disk drive activity light, usually an LED (Light Emitting Diode) on the front panel. If you connect your system's LED cable to the host adapter, the LED will light to indicate data transfer on the SCSI bus. Note: If you connect your computer's LED to the host adapter, the LED will no longer indicate non-SCSI disk activity. So you may not want to use this feature if you are running non-SCSI disk drives.
AHA-2740W/2742W/2744W User’s Guide Before Rebooting Your System Before rebooting your system and configuring your host adapter, make sure the following is completed: 1 The SCSI bus is properly terminated. 2 Each SCSI device on the SCSI bus is set to a unique SCSI ID (0-15 for Wide SCSI devices and the host adapter; 0-7 for standard 8-bit SCSI devices). 3 The host adapter is firmly seated in the host computer's EISA slot.
▼ ▼ ▼ ▼ 3 Configuring the Host Adapter About This Chapter Read this chapter to find out ■ The steps involved in configuring your host adapter with the EISA configuration utility provided with your EISA system ■ The host adapter parameters that can be configured ■ The options available to configure the host adapter BIOS and the devices connected to the host adapter ■ The utilities available in the EISA configuration utility 3-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A A
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Configuring the Host Adapter ▼ ▼ ▼ ▼ 3 The EISA Configuration Utility All EISA machines are shipped with a bootable EISA configuration diskette that contains a software program generally known as the EISA Configuration Utility (ECU). This utility is used to automate the configuration of the motherboard and all option boards installed in your EISA system. The ECU must be run every time an adapter card is physically added, removed, or moved. The ECU operates on the information provided by the .
AHA-2740W/2742W/2744W User’s Guide Place the bootable EISA configuration diskette in an operative drive and reset the system to boot from this diskette. If you have the ECU installed on your hard disk, reboot your system and run it from your hard disk. After booting with the host adapter installed, ignore any error that indicates that an unknown board has been detected in the system. Copy Configuration and Overlay Files The !adp7771.cfg configuration file and adp7770.
Configuring the Host Adapter Configure the Host Adapter Parameters Use the cursor keys and/or function keys as instructed on the screen's menu to move between each parameter, or to select and configure each parameter. Interrupt Level Select Interrupt Level to configure the interrupt channel (IRQ) used by the host adapter. Figure 3-2 displays your choices. The default setting is IRQ 11.
AHA-2740W/2742W/2744W User’s Guide Bus Release Time Select Bus Release Time to configure the amount of time, in BCLKS (Bus Clocks), the host adapter will continue to transfer data after being pre-empted in Bus Master mode. Figure 3-3 displays your choices. The default setting is 44 BCLKS. Normally 44 BCLKS is optimum; however, if multiple bus master cards are installed in the system, you may want to lower the value to free the EISA bus sooner.
Configuring the Host Adapter Host Adapter BIOS Base Address Select Host Adapter BIOS Base Address to configure the BIOS base address for the host adapter, or to disable the host adapter BIOS. Figure 3-6 displays your choices. The default setting is a base address of D8000h. When choosing the base address, verify that there is no conflict with other devices using the same address–often the configuration utility will notify you if there is a conflict.
AHA-2740W/2742W/2744W User’s Guide Wide SCSI Channel Interface Definitions Select Wide SCSI Channel Interface Definitions to display the following screen. Only one function displays and no other choices are available. Wide SCSI Channel Interface Definitions SCSI Channel Interface ( ) Wide Channel, Differential SCSI [Select=ENTER] [Cancel=ESC] Figure 3-6.
Configuring the Host Adapter If two host adapters are installed, each would have its own SCSI bus, thus each host adapter would still be set to SCSI ID 7. Refer to SCSI ID Setting on page 2-15 for additional information on SCSI ID. Wide SCSI Channel Interface Definitions Host Adapter SCSI ID ( ( ( ( ( ( ( ( ( ( [Select=ENTER] )7 )6 )5 )4 )3 )2 )1 )0 ) 15 ) 14 [Cancel=ESC] Figure 3-7.
AHA-2740W/2742W/2744W User’s Guide SCSI Selection Timeout Select SCSI Selection Timeout to configure the time, in milliseconds, used by the host adapter during the SCSI Selection phase. Figure 3-9 displays your choices. The default setting is 256 milliseconds. Lowering the SCSI Selection Timeout will speed up SCSI bus scans considerably; however, before lowering this value, make sure that all the devices on the SCSI bus can respond to the shorter selection time.
Configuring the Host Adapter SCSI Bus Termination (AHA-2740W and AHA-2742W Only) Select SCSI Bus Termination to configure SCSI termination on the host adapter. Figure 3-11 displays your choices. The default setting is ON for both the Low and High byte. Host adapter termination is determined by which SCSI connectors on the AHA-2740W/2742W have SCSI devices connected. Refer to Termination on the SCSI Bus on page 2-9 for configuration options.
AHA-2740W/2742W/2744W User’s Guide BIOS Configuration BIOS Configuration allows you to configure the host adapter BIOS. Figure 3-13 displays your choices. Use the cursor keys to move between options. To toggle values for each option, press the Enter key. BIOS Configuration This configuration will affect BIOS only. ( ( ( ) Support Removable Disks as Fixed Disk .......Boot Device Only ) Extended Translation for Drives > 1 GByte ............... Enabled ) Support More than two drives .........................
Configuring the Host Adapter Extended Translation for Drives > 1 GByte This option allows you to enable or disable extended translation for SCSI hard disks with a capacity greater than 1 GByte. The default setting is enabled. Appendix D, Disk Drives Over 1 GByte discusses the extended translation feature in detail.
AHA-2740W/2742W/2744W User’s Guide Use the cursor keys to move between options. To toggle values for each option, press the Enter key. Configuration Setting for SCSI Devices (1x16) Channel A Device ID #0 #1 #2 #3 #4 #5 #6 #7 Enable Disconnection Initiate Sync Negotiation Maximum Sync Xfer Rate Initiate Wide Negotiation Include in BIOS Scan Error if Device Not Found Send Start Unit Command yes yes 10.0 yes yes no no yes yes 10.0 yes yes no no yes yes 10.0 yes yes no no yes yes 10.
Configuring the Host Adapter overhead. In multidevice environments, disconnect should normally be enabled to take advantage of the disconnect/reconnect feature. If a particular SCSI device does not support disconnect/reconnect, then Enable Disconnection should be disabled (set to no). If a particular SCSI device does support disconnect/reconnect, then Enable Disconnection should be enabled (set to yes). Most SCSI devices today do support disconnect/reconnect.
AHA-2740W/2742W/2744W User’s Guide then the value selected here will be the maximum rate that the host adapter will accept. In most cases, the maximum value of 10.0 MBytes/sec can be used. If the drive is not a Fast SCSI drive and cannot support the fast data transfer rates, it can negotiate for a slower rate (this is standard SCSI protocol). However, if a drive cannot accept values greater than 5.
Configuring the Host Adapter Caution: If a removable media SCSI device is controlled by the host adapter BIOS, do not remove the media while the system is powered-on or data loss could occur! The host adapter BIOS does not support removability while the system is turned on. If removability is desired while the system is powered-on, the removable media device should be installed with device drivers and not the host adapter BIOS.
AHA-2740W/2742W/2744W User’s Guide Note: If many drives are set to yes for the SCSI Start Unit Command, system boot time will vary depending on how long each drive takes to spin up. Exit SCSI Device Configuration When configuration of SCSI devices is complete, press Esc to Exit SCSI Device Configuration; you will be prompted to either save or abandon device configurations, as shown in Figure 3-15.
Configuring the Host Adapter Disk Format Utility This utility allows you to low-level format your SCSI disk and/or verify disk media for defects. Note: When migrating hard disk drives and/or removable media drives from other manufacturers host adapters, the Disk Format Utility should be run to low-level format your drive. Disk Format Your fixed disk media must be low-level formatted before you can use your operating system's partitioning and file preparation commands, such as MS-DOS fdisk and format.
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▼ ▼ ▼ ▼ 4 Troubleshooting About This Chapter Read this chapter to find out ■ How to use the troubleshooting checklist to diagnose problems that may occur when you install a host adapter in your system ■ Problems you may encounter and how to fix them ■ How to resolve conflicts with other options 4-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
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AHA-2740W/2742W/2744W User’s Guide If your problem is still not resolved, continue with the next section. Problems and Solutions The screen is difficult to read when I run the ECU. Try pressing F5 to toggle the display between color and monochrome modes. This may enable you to read the screen more easily. I installed the host adapter, and my computer will not boot from the SCSI disk drive. If both SCSI and non-SCSI disk drives are installed, then the nonSCSI disk drive is always the boot device.
Troubleshooting When I tried to use the format/verify utility on a disk device, I got an Unexpected SCSI Command Failure pop-up box with a lot of error information. What does this mean? This probably means that the utility encountered a problem with the disk device or the media and therefore cannot run. The following information appears in the pop-up window: ■ SCSI Target ID of the device ■ SCSI CDB Sent (e.g., 2F 00 00 00 00 00 00 08 00 00) ■ Host Adapter Status (e.g.
AHA-2740W/2742W/2744W User’s Guide My computer locks up when I press Esc to exit the ECU. If this happens, turn your machine off and then on to reboot. Any settings you changed before you tried to exit the program have been registered in the EEPROM and will not be lost. One of the SCSI devices on my system does not allow termination to be disabled. How can I attach it to the SCSI bus? You might be able to attach this device on the end of the SCSI bus so you do not need to disable termination on it.
▼ ▼ ▼ ▼ A Specifications About This Appendix Read this appendix to find out ■ Technical specifications of the AHA-2740W/2742W/2744W, EISA interface, SCSI interface, and floppy disk interface ■ Pin assignments for the internal and external SCSI connectors A-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
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Specifications ▼ ▼ ▼ ▼ A Technical Information The basic technical specifications of the host adapter are described below. If you need more detailed information, contact Adaptec's Literature Hotline at the phone number listed on page iii. Product Specifications Physical Dimensions Length: Width: Height: 8.5 inches 0.625 inches 5.0 inches Standard EISA-compatible form factor Power Requirements +5.0 +/- 0.25 Volts at 2.
AHA-2740W/2742W/2744W User’s Guide Extended Industry-Standard Architecture Interface Driver Output Signals: VOL 0 volts minimum IOL 24 mA VOH 2.4 volts minimum IOH 8 mA 0.4 volts maximum 5.25 volts maximum Receiver Input Signals: VIL 0.8 volts maximum VIH 2.0 volts minimum SCSI Interface Electrical Interface These are the specifications listed in ANSI X3.131-1986 for singleended and differential operation. Single-ended Output Signals All signals use open-collector or three-state drivers.
Specifications Single-ended Input Signals SCSI inputs meet the following electrical characteristics on each signal, including both receivers and passive drivers: Signal Definition Characteristics VIL Low-level input voltage 0.0 to 0.8 volts DC (signal true) VIH High-level input voltage 2.0 to 5.25 volts DC (signal false) IIL Low-level input current -0.4 to 0.0 mA at V1=0.5 volts DC IIH High-level input current 0.0 to 0.1 mA at V1=2.7 volts DC Minimum input hysteresis = 0.2 volts DC.
AHA-2740W/2742W/2744W User’s Guide 50-pin SCSI Connector The 50-pin internal SCSI connector must be an unshrouded 50-pin header, compatible with unshielded Alternative 1 connector, as specified in ANSI X3.131-1986. Table A-1 lists the pin assignments for the 50-pin single-ended connector. Table A-3 lists the pin assignments for the 50-pin differential connector. 68-pin SCSI Connectors The 68-pin internal Wide SCSI connector is a high-density unshielded (Alternative 1) connector.
Specifications Table A-1.
AHA-2740W/2742W/2744W User’s Guide Table A-2.
Specifications Table A-3.
AHA-2740W/2742W/2744W User’s Guide Table A-4.
Specifications Floppy Disk Interface Standard Electronic and Physical Interface Driver Output Signals: VOL 0 volts minimum 0.5 volts maximum VOH Open collector 5.25 volts maximum IOL 60 mA IOH 0.1 mA Receiver Input Signals: VT- 1.0 volts maximum VT+ 1.4 volts minimum Tied to +5 volt supply through 150 ohm resistors. Schmitt Trigger with 0.8-volt hysteresis. Connector The floppy disk interface connector should be an unshrouded 34-pin header.
▼ ▼ ▼ ▼ B I/O Operating Environment About This Appendix Read this appendix to find out ■ If embedded support for your host adapter is available with your operating system ■ Whether or not you need additional software for your host adapter in the DOS/ Windows environment ■ Information on Adaptec's EZ-SCSI I/O Operating Environment Software that makes driver installation easier than ever before B-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide
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I/O Operating Environment ▼ ▼ ▼ ▼ B Host Adapter Support You may not need to install additional environment software in order to use your host adapter. Adaptec is working with major operating system suppliers to provide embedded support in their operating systems. Please contact Adaptec or your operating system vendor for information on the current schedule for I/O Operating Environment Software support.
AHA-2740W/2742W/2744W User’s Guide Adaptec EZ-SCSI If you are running MS-DOS or MS-DOS with Windows, Adaptec EZ-SCSI I/O Operating Environment Software makes driver installation easier than ever before. Adaptec EZ-SCSI is a menudriven software package that configures your operating environment automatically. Adaptec EZ-SCSI has a number of utility programs including afdisk and scsifmt, which are used to partition and format SCSI disk devices.
▼ ▼ ▼ ▼ C Optimizing Performance About This Appendix Read this appendix to find out ■ How to optimize your system's performance after installing the host adapter C-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
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Optimizing Performance ▼ ▼ ▼ ▼ C Performance Tips The AHA-2740W/2742W/2744W is designed to maximize the performance of your SCSI devices and computer. The following tips will help you take full advantage of the host adapter's advanced design features. Enabling Synchronous Negotiation Synchronous Negotiation is enabled (set to yes) by default on the AHA-2740W/2742W/2744W.
AHA-2740W/2742W/2744W User’s Guide Disabling the Host Adapter BIOS Disabling the host adapter BIOS saves you 16 KBytes of memory address space and can also shorten boot-up time by as much as 60 seconds. See BIOS Configuration on page 3-12. You should disable the host adapter BIOS if the peripherals on the SCSI bus (for example, CD-ROM drives) are all controlled by device drivers and do not require BIOS control.
Optimizing Performance Send Start Unit Command is disabled (set to no) by default. Check your hardware documentation before you enable (set to yes) this option to make sure your devices support it. Then change the switch or jumper settings on the device to enable the option. To enable/ disable Send Start Unit Command, See Device Configuration on page 3-13. Try enabling Send Start Unit Command for one peripheral at a time, rebooting each time to make sure each SCSI device works properly.
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▼ ▼ ▼ ▼ D Disk Drives Over 1 GByte About This Appendix Read this appendix to find out ■ An overview of extended translation and the DOS 1 GByte limit ■ When to use the extended translation feature ■ Questions and answers about extended translation D-1 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
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Disk Drives Over 1 GByte ▼ ▼ ▼ ▼ D Extended Translation (Using DOS 5.0) Adaptec host adapters have always supported the full range of disk drive sizes under all major operating systems. As disk drives have recently grown beyond 1 GByte in fo(t)-15(n Tcı˝t)-21(e in)-2.(D c Tcı˝tpaciin)-2.y(s)4(, s)-1 (e in)as- D-3 A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AHA-2740W/2742W/2744W User’s Guide A AA A A Stock Number: 510647-00, Rev.
AHA-2740W/2742W/2744W User’s Guide Drives With Mixed Partitions Do not use extended translation on drives formatted with two or more partitions for different operating systems. Use standard translation. The sum of the DOS partitions will be less than 1 GByte. Partitions for UNIX and NetWare can be larger than 1 GByte when using standard translation. Note: UNIX is understood to be AT&T®/USL all versions, SCO® v3.2.4 (or later) and ISC v3.0 (or later).
▼ ▼ ▼ ▼ Glossary A Adaptec EZ-SCSI A user-friendly software program that automatically installs software drivers for SCSI devices such as fixed disks and CD-ROM drives on a PC. Adaptec EZ-SCSI copies the required software programs to the PC's fixed disk and edits the configuration files so the host adapter can access the devices. Advanced SCSI Programming Interface See ASPI. AIC-7770 Adaptec's single-chip EISA-toFast SCSI host adapter. ASPI Advanced SCSI Programming Interface.
AHA-2740W/2742W/2744W User’s Guide adapter boards, and video adapters. Expansion devices use the bus to send data to and receive data from the PC's CPU or memory. ISA, EISA, and Micro Channel® are the major bus standards used in PCs. Bus Device Reset A SCSI message that clears all pending activity in the SCSI peripheral device target to which it is addressed.
Glossary are loaded into memory at boot time. Differential A term referring to the electrical characteristics of the signals used on the SCSI bus interface. Differential signals occupy two conductors with a positive (+) and negative (-) polarity component of the signal. This minimizes the effect of common mode signal noise and allows the SCSI bus to operate reliably over greater distances at a higher speed.
AHA-2740W/2742W/2744W User’s Guide F Host Adapter FIFO First In/First Out. A queuing order in which items are removed from the queue for execution in the same order in which they are placed in the queue. An integrated circuit that buffers data in such a manner that each byte placed in the buffer is removed from the buffer in the same order. Firmware The software that controls and manages the host adapter.
Glossary ISA Industry Standard Architecture expansion bus. A type of computer bus used in most PCs. ISA enables expansion devices like network cards, video adapters, and modems to send data to and receive data from the PC's CPU and memory 16 bits at a time. Expansion devices are plugged into sockets in the PC's motherboard. ISA is sometimes called the AT bus, because it was originally introduced with the IBM PC-AT in 1983. K KByte Kilobyte. A measure of computer storage. One KByte equals 1024 bytes.
AHA-2740W/2742W/2744W User’s Guide devices it requests data from the first device, which temporarily disconnects from the SCSI bus while it is seeking the data. During this delay the system requests data from the second device, and while that device disconnects from the bus to seek the data, the first device starts sending the requested data over the bus, etc. The AHA-2740W/ 2742W/2744W and all other Adaptec host adapters fully support multithreaded I/O.
Glossary configuration. The bus may include both internal and external SCSI devices. In systems that have more than one host adapter, each adapter has its own separate SCSI bus. SCSI Device A device such as a host adapter board, fixed disk drive, or CDROM drive that conforms to the SCSI interface standard and is attached to a SCSI bus cable. The device may be an initiator, a target, or capable of both types of operation.
AHA-2740W/2742W/2744W User’s Guide negotiated, synchronous data transfer parameters remain unchanged until certain reinitialization activities occur. Wide Data Transfer Negotiation When SCSI devices negotiate to transfer 16-bit data at the transfer rate. Word T A 2-byte (16-bit) unit of data. Tagged Queuing A SCSI-2 feature that allows the SCSI device to queue return data commands in a different order than requested by the SCSI host adapter, thereby increasing performance.
▼ ▼ ▼ ▼ Index !adp7771.
AHA-2740W/2742W/2744W User’s Guide location 2-8 P-cable 2-6 standard internal 8-bit SCSI 1-6, 2-4, 2-6, 2-8, 2-13, A-6 CPU 1-3, 1-4 D Data FIFO threshold 1-8, 3-6 Data transfer 1-3, 1-4, 3-16 Default settings 1-8 Device driver software 3-16 Disconnect/reconnect 3-14, C-4 Disk array 1-4 Disk device booting from 4-4 formatting B-4 removable B-3 DOS B-3, C-5 copy command 3-4 fdisk command D-4 E ECU see EISA configuration utility EISA bus 1-3 EISA configuration diskette 2-8, 3-4 EISA configuration utility 1-4
Index preparing your devices 2-5 standard 8-bit SCSI devices 2-6, 2-18 wide SCSI devices 2-6, 2-20, 2-23 Interrupt level 1-8, 3-5 see also IRQ IRQ 1-8, 3-5, 4-6 J Jumper 1-4 floppy enable 1-4, 1-6, 1-7 J1 1-4, 1-6, 1-7, 1-8 L LED connector 1-6, 1-7, 2-8, 2-27 Low-level format 3-19, 4-4 M Multiple host adapters 2-4 O Operating environment B-1 configuring automatically B-4 Optimizing performance C-1 P Parameters 2-8, 3-5 Parity 1-8, 3-9, C-4 Partitions D-4 Performance tips C-3 PhaseEngine 1-3 Power requi
AHA-2740W/2742W/2744W User’s Guide T Task scheduling 1-4 Termination see SCSI termination Transfer rate see Data transfer Translation schemes 3-13 Troubleshooting 4-1, 4-3 U Unpacking and inspecting 1-9 Utilities 3-18 Adaptec EZ-SCSI B-4 disk format 3-19, 4-4 low-level format 3-19, 4-4, 4-5, D-1 W Wide negotiation 3-16 Wide SCSI external cable 2-23 external connector 1-6, 1-7, 2-8 installation 2-20 internal cable 2-20 internal connector 1-6, 1-7, 2-8 Windows B-3, C-5 Index-4 A AAAAAAAAAAAAAAAAAAAAAAAAA
