1
Introduction
The AHA
®
-2920C host adapter provides a powerful multitasking
interface between your computer’s PCI bus and SCSI devices (disk
drives, CD-ROM drives, scanners, tape drives, removable-media
drives, etc.). You can connect up to seven 8-bit SCSI devices to your
host adapter. The following figure shows the major components of the
AHA-2920C host adapter
The AHA-2920C host adapter provides a powerful multitasking
interface between your computer’s PCI bus and internal and external
SCSI devices (disk drives, CD-ROM drives, tape drives, removable-
media drives, etc.). The host adapter supports SCSI Configured
AutoMatically (SCAM), which automatically assigns SCSI IDs to
SCAM compatible devices. The figure below identifies the major com-
ponents of the AHA-2920C host adapter.
With the Adaptec software drivers, you can use AHA-2920C host
adapters in computers running DOS/Windows
®
, OS/2,
Windows
®
95, Windows NT™, UNIX, and NetWare.
J3
50-pin Internal SCSI Connector
SCSI Terminator Chips
External LED
Connector
EEPROM
BIOS
40 Mhz Clock
Crystal
SCSI Chip
50-pin High-Density External
SCSI-2 Connector
Contents
Installation
Installing the Host Adapter . . . . . 2
Installing Internal SCSI Devices . 3
Installing External SCSI Devices . 4
Installing Software . . . . . . . . . . . . 5
Helpful Hints
Configuring SCSI Devices . . . . . . 5
Configuring Disk Drives . . . . . . . 6
Installing Multiple Adapters . . . . 6
Using SCSISelect . . . . . . . . . . . . . . 6
Troubleshooting Checklist . . . . . 10
Common Problems and
Solutions . . . . . . . . . . . . . . . . . . 11