Installation Guide AHA-2840A/2842A High Performance Bus Master VL-to-Fast SCSI Host Adapter with SCSISelect™ R AA AAAA AA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAA AA AHA-2840A/2842A Installation Guide AA AA AA AA AA Part Number: 510590-00, Rev B AA AA AA AA Print Spec Number: 492663-00 AA AA AA AA Current Date: 5/9/96 ECN Date: 6/3/96 AA AA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A
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Default Settings AHA-2840A/2842A host adapters operate correctly with their factory default settings in the majority of PC systems featuring VL-Bus slots.
3 Remove the corresponding expansion board access cover on the computer chassis. 4 Align the bus connector on the bottom of the host adapter with the VL-Bus slot and carefully press it down into the slot. Secure the host adapter bracket to the computer chassis with the screw from the removed expansion slot cover.
if no SCSI hard disk drives are connected to the host adapter, you can reduce bootup time if you disable the host adapter BIOS. Matching I/O Address and Slot Number In EISA/VL-Bus systems, we recommend that the host adapter I/O address match the number of the VL-Bus slot in which the host adapter is installed. (See your PC documentation to determine the slot numbers.
Caution: AHA-2840A/2842A host adapters support only single-ended SCSI devices. Differential SCSI devices may be damaged if connected to the host adapter. The peripheral documentation will tell you whether the device is single-ended or differential. 1 Lay out the cables and find the pin-1 element of each cable and peripheral connector. On internal cables, pin 1 is usually marked with a contrasting color on one edge of the ribbon cable, and a small triangle marks pin 1 on the SCSI connector.
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In most cases your computer, host adapter, and SCSI peripherals are now ready to use. 6 Configuring the Host Adapter Your host adapter includes the built-in, menu-driven SCSISelect configuration utility. SCSISelect lets you change host adapter settings such as interrupt channel and host adapter termination without opening your computer or setting switches. SCSISelect also includes a low-level formatting utility.
If you select Advanced Configuration Options you can view a menu of these advanced options: Data FIFO Threshold, Host Adapter BIOS Enable or Disable, Support Removable Disks under the BIOS as Fixed Disks, Extended BIOS Translation, SCSI Bus Reset at Host Adapter Initialization, and BIOS Support for More than 2 Drives. SCSI Disk Utilities When you select SCSI Disk Utilities from the Main Menu, the SCSI devices installed at SCSI IDs 0 through 7 are displayed (including nondisk devices).
You need additional software, such as Adaptec’s EZ-SCSI, if you want to ■ Remove and insert magneto-optical and other removable media while your computer is running ■ Support more than two hard disk drives under versions of DOS prior to MS-DOS 5.0 ■ Use devices other than hard disk drives, such as SCSI tape drives, CD-ROM drives, scanners, etc.
device. If the system has only SCSI disk drives, check the following: 1 Make sure your computer's CMOS Setup is set to No Drives Installed, as required for SCSI host adapters. 2 Make sure the boot hard disk SCSI ID is 0. The SCSI ID is normally set with jumpers or switches on the drive. 3 If this does not solve the problem, back up all data on the SCSI hard disk and perform a low-level format with the SCSISelect Format Disk option.
Adaptec Technical Support and Services If you have questions about installing or using your Adaptec product, check this installation guide first—you will find answers to most of your questions here. If you need further assistance, please contact us.
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, Inc. 691 South Milpitas Blvd. Milpitas, CA 95035 Copyright © 1993, 1994, 1996, Adaptec, Inc. All rights reserved. Adaptec, the Adaptec logo, AHA, and SCSISelect are trademarks of Adaptec, Inc. which may be registered in some jurisdictions. All other trademarks are owned by their respective owners. Printed in Singapore Stock No.: 510590-00, Rev B MR 5/96 Information subject to change without notice.
