USER’S REFERENCE SCSI CARD 2940U2W
© 1997 Adaptec, Inc. All rights reserved. Adaptec, and the Adaptec logo are trademarks of Adaptec, Inc. which may be registered in some jurisdictions. Printed in Singapore STOCK NO.: 511795-00, Rev.
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▼ ▼ ▼ ▼ Contents Understanding SCSI 1 SCSI IDs 1 SCAM Protocol 2 Terminating the SCSI Bus 3 Troubleshooting 4 Troubleshooting Checklist 4 Troubleshooting in Windows 95 5 Common Error Messages 9 Using the SCSI Card 2940U2W and SCSI Peripherals 10 Using SCSI Peripherals 10 Hard Disk Drives 10 Scanners 11 SCSI Peripheral Display at Bootup 12 Installing Multiple SCSI Cards 12 Connecting the LED Connector 13 Using SCSI and IDE (or EIDE) Peripherals 14 Replacing a Non-Adaptec SCSI Card with an Adaptec SCSI Ca
SCSI Card 2940U2W User’s Reference SCSI Device Configuration 19 Advanced Configuration Options 20 Using SCSI Disk Utilities 22 Obtaining SCSI Cables and Adapters 23 External Cables 23 External Connector Diagrams 23 Internal Cables 24 Internal Connector Diagrams 24 Cabling Examples 25 Maximum Cable Lengths 27 ❒ iv
Understanding SCSI SCSI (pronounced “scuzzy”) stands for Small Computer Systems Interface. SCSI is an industry standard computer interface for connecting SCSI peripherals (such as a hard disk drive, CD-ROM drive, or scanner) to a common SCSI bus. A SCSI bus is an electrical pathway that consists of a SCSI adapter card (such as the SCSI Card 2940U2W) installed in a computer and one or more SCSI peripherals. SCSI cables are used to connect the peripherals to the SCSI adapter card.
SCSI Card 2940U2W User’s Reference ■ SCSI ID numbers don’t have to be sequential, as long as the SCSI Card 2940U2W and each peripheral has a different number. For example, you can have an internal SCSI peripheral with ID 0, and an external SCSI peripheral with ID 6. Gaps in the sequence of numbers don’t matter. ■ SCSI ID 7 has the highest priority on the SCSI bus. The priority of the remaining IDs, in descending order, is 6 to 0, 15 to 8.
Understanding SCSI Terminating the SCSI Bus To ensure reliable communication on the SCSI bus, the ends of the SCSI bus must be properly terminated. This is accomplished when the peripheral at the end of each cable, or the end of the cable itself, has a terminator installed (or enabled). The peripherals between the ends of each cable must have its terminator removed (or disabled).
SCSI Card 2940U2W User’s Reference Troubleshooting Most problems can be resolved by following the recommendations in Troubleshooting Checklist below. If you still experience problems after following the recommendations, continue with the remainder of this section. Troubleshooting Checklist Most problems with using the SCSI Card 2940U2W result from errors in preparing and connecting peripherals on the SCSI bus. If you have problems, check these items first.
Troubleshooting ■ If there is an option to enable or disable bus mastering for the PCI slots, select Enabled. ■ If there is an option to enable or disable individual PCI slots, be sure the slot in which you install the SCSI Card 2940U2W is Enabled. ■ If your computer has a combination of ISA (or EISA) boards and PCI boards, you may need to mark the IRQs used by ISA/EISA boards as Used so the computer BIOS will not try to assign these IRQs to other PCI boards.
SCSI Card 2940U2W User’s Reference 6 Verify an IRQ is available by viewing resources in System Properties. 7 Verify the Operating System is set to Optimal Performance by checking the Performance tab under System Properties. How can I tell if the SCSI Card 2940U2W software driver is loading properly? 1 Click the Start button, point to Settings, then click Control Panel. 2 Double-click the System icon. 3 Click the Device Manager tab. 4 Double-click the SCSI Controller icon.
Troubleshooting An “X” inside a red circle appears with the SCSI Card 2940U2W software driver in Device Manager. What does this mean? The SCSI Card 2940U2W software driver is disabled and isn’t loading. To enable the driver: 1 Double-click the SCSI Card 2940U2W software driver in Device Manager. 2 Under the General tab, check the Original Configuration (current) box.
SCSI Card 2940U2W User’s Reference 6 Look in the \drivers\storage directory of the Windows 95 CD-ROM (or the root directory of the EZ-SCSI Setup Diskette) and select the model of your SCSI card. How can I check the status of a resource (for example, IRQ, Memory, I/O)? 1 Click the Start button, point to Settings, then click Control Panel. 2 Double-click the System icon. 3 Click the Device Manager tab. 4 Double-click the Computer icon.
Troubleshooting Common Error Messages The following messages may appear at bootup: “Device connected, but not ready” The host received no answer when it requested data from an installed SCSI peripheral. ■ ■ Run SCSISelect® and set the Send Start Unit Command to Yes for the particular SCSI peripheral. Make sure the drive is set to spin up when the power is switched on. (See the documentation for the peripheral.
SCSI Card 2940U2W User’s Reference Using the SCSI Card 2940U2W and SCSI Peripherals This section provides useful information on using the SCSI Card 2940U2W and your SCSI peripherals. For specific information, refer to the documentation that came with your SCSI peripheral. Using SCSI Peripherals Hard Disk Drives ■ Every SCSI hard disk drive must be physically low-level formatted, partitioned, and logically formatted before it can be used to store data.
Using the SCSI Card 2940U2W and SCSI Peripherals Ultra2 Hard Disk Drives ■ We recommend keeping your Ultra2 hard disk drives separate from your non Ultra2 peripherals. Connecting a non Ultra2 hard disk drive to the Ultra2 connector on the SCSI Card 2940U2W causes the Ultra2 SCSI segment of the SCSI bus to drop down to Ultra SCSI performance levels (40 MBytes/sec). ■ Do not connect your Ultra2 hard disk drives to connectors other than the Ultra2 connectors on the SCSI Card 2940U2W.
SCSI Card 2940U2W User’s Reference SCSI Peripheral Display at Bootup At bootup, each peripheral attached to the SCSI Card 2940U2W is identified by SCSI ID, name, the SCSI segment to which it is attached (Ultra2 or Fast/Ultra), and the mode (LVD-Ultra2 or SEUltra) in which it is running.
Using the SCSI Card 2940U2W and SCSI Peripherals ■ If you have two or more SCSI cards, enable the BIOS on the boot SCSI card only; disable the BIOS on the remaining SCSI cards. Connecting the LED Connector (Optional feature) Most computers have an LED disk activity light on the front panel.
SCSI Card 2940U2W User’s Reference Using SCSI and IDE (or EIDE) Peripherals ■ All Adaptec SCSI cards can coexist with another controller (IDE, EIDE, RLL, etc.) installed in the computer. ■ If you have both an IDE hard disk drive and a SCSI hard disk drive, the IDE drive is typically the boot drive. In this case, disable the BIOS on the SCSI card (see Advanced Configuration Options on page 20).
Configuring the SCSI Card 2940U2W with SCSISelect Configuring the SCSI Card 2940U2W with SCSISelect SCSISelect, included with the SCSI Card 2940U2W, enables you to change SCSI settings without opening the computer or handling the card. SCSISelect also enables you to low-level format or verify the disk media of your SCSI hard disk drives. Table 1 lists the available and default settings for each SCSISelect option. Note: The default settings are appropriate for most systems.
SCSI Card 2940U2W User’s Reference Table 1.
Configuring the SCSI Card 2940U2W with SCSISelect Note: If you have difficulty viewing the display, press F5 to toggle between color and monochrome modes. (This feature may not work on all monitors.) Exiting SCSISelect Follow these steps to exit SCSISelect: 1 Press Esc until a message prompts you to exit (if you changed any settings, you are prompted to save the changes before you exit). 2 At the prompt, select Yes to exit, then press any key to reboot the computer.
SCSI Card 2940U2W User’s Reference ■ Host Adapter SCSI Termination—Determines the termination setting for the SCSI card. The default setting for both the Ultra2-LVD/SE connector and Fast/Ultra-SE connector is Automatic. We recommend that you leave this setting at Automatic. If you want to manually change this setting for the Fast/Ultra-SE connector, Table 2 lists the recommended configurations. Table 2.
Configuring the SCSI Card 2940U2W with SCSISelect SCSI Device Configuration Note: To configure settings for a SCSI peripheral, you must know its SCSI ID (see Using SCSI Disk Utilities on page 22). ■ Initiate Sync Negotiation—When set to Yes, initiates synchronous data transfer negotiation (Sync Negotiation) between the peripheral and SCSI card. Leave this setting set to Yes unless any attached SCSI peripheral connected to the SCSI card does not support synchronous negotiation.
SCSI Card 2940U2W User’s Reference Advanced Configuration Options Note: Do not change the Advanced Host Adapter Settings unless absolutely necessary. ■ Plug-and-Play SCAM Support—When set to Enable, the SCSI card automatically assigns SCSI IDs to SCSI peripherals that support the SCAM protocol (see SCSI IDs on page 1). The default is Disable, but you can set it to Enable even if you have a non-SCAM peripheral.
Configuring the SCSI Card 2940U2W with SCSISelect ■ Boot Only—Only the removable-media drive designated as the boot device is treated as a hard disk drive. ■ All Disks—All removable-media drives supported by the BIOS are treated as hard disk drives. ■ Disabled— No removable-media drives are treated as hard disk drives. Software drivers are required because the drives are not controlled by the BIOS.
SCSI Card 2940U2W User’s Reference Using SCSI Disk Utilities To access the SCSI disk utilities, follow these steps: 1 Select the SCSI Disk Utilities option from the menu that appears after starting SCSISelect. SCSISelect scans the SCSI bus (to determine the devices installed) and displays a list of all SCSI IDs and the devices assigned to each ID. (See SCSI Peripheral Display at Bootup on page 12 for a definition of the messages displayed.
Obtaining SCSI Cables and Adapters Obtaining SCSI Cables and Adapters High-quality cables are required in high-performance SCSI systems to ensure data integrity. Adaptec provides the highest quality SCSI cables and adapters designed specifically for use with Adaptec SCSI cards. For purchasing information, contact Adaptec at 1-800-442-SCSI (7274), Monday to Friday, from 6 a.m. to 5 p.m. (Pacific Time). External Cables Table 3.
SCSI Card 2940U2W User’s Reference Figure 5. Ultra2 and High-Density 68-pin Internal Cables Table 4. Internal Cables Description Part Number 3 position (2 peripherals + adapter card), standard 50-pin Internal Ultra SCSI (1 m) ACK-INT3-PNP 5 position (4 peripherals + adapter card), standard 50-pin Internal Ultra SCSI (1.5 m) ACK-INT5-PNP 5 position (4 peripherals + adapter card), High-Density 68-pin Internal Ultra2 SCSI (1.
Obtaining SCSI Cables and Adapters Cabling Examples High-density 68-pin Internal Ultra2 SCSI Cable Built-in Terminator Ultra2 Peripheral Ultra2 Peripheral Ultra2 Peripheral Ultra2 Peripheral SCSI Card 2940U2W Figure 8.
SCSI Card 2940U2W User’s Reference Fast/Ultra Narrow Peripheral (Terminated) High-density 68-pin Internal Ultra2 SCSI Cable Built-in Terminator Ultra2 Peripheral Ultra2 Peripheral Ultra2 Peripheral Standard 50-pin Internal-toHigh-density 50-pin External Ultra SCSI Cable Ultra2 Peripheral SCSI Card 2940U2W Fast/Ultra Narrow Peripheral Fast/Ultra Narrow Peripheral Figure 12.
Obtaining SCSI Cables and Adapters Maximum Cable Lengths The total length of cabling (internal and external) on the SCSI bus may not exceed the maximum lengths listed in Table 5. Table 5. Maximum Cable Lengths Maximum Cable Length Data Transfer Rate Maximum Peripherals Supported 12 m (29.4 ft) Ultra2 (80 MBytes/sec)1 15 3 m (9.8 ft) Fast SCSI (10 MBytes/sec) 7 3 m (9.8 ft) Wide SCSI (20 MBytes/sec) 15 3 m (9.8 ft) Ultra SCSI (40 MBytes/sec for 16-bit, 20 MBytes/sec for 8-bit) 4 1.5 m (4.
Copyright © 1997 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, AIC, EZ-SCSI, SpeedFlex, and SCSISelect are trademarks of Adaptec, Inc. which may be registered in some jurisdictions.
Federal Communications Commission Radio Frequency Interference Statement WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 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. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
Adaptec Software License Agreement In return for acquiring a license to use the software (“Software”) and related documentation, you agree to the following terms and conditions: 1 License: This Agreement grants you, the Licensee, a license to: a use the Software on a single computer system which incorporates an Adaptec SCSI Card, or in the case of a multi-user or networked system which permits access to the Software by more than one user at the same time, at a single working location.
9 Export: You acknowledge that the laws and regulations of the United States restrict the export and re-export of the Software. You agree that you will not export or re-export the Software or media in any form without the appropriate United States and foreign government approval. 10 U.S.
Limited 5-Year Warranty Adaptec, Inc. (“Adaptec”) warrants to the purchaser of this product that it will be free from defects in material and workmanship for a period of five (5) years from the date of purchase. If the product should become defective within the warranty period, Adaptec, at its option, will repair or replace the product, or refund the purchaser’s purchase price for the product, provided it is delivered at the purchaser’s expense to an authorized Adaptec service facility or to Adaptec.
