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The AHA-2840A host adapter combines the power of the Video Electronics Standards Association (VESA) local bus (VL-Bus) and Adaptec's SCSI technology to give you a potent combination of I/O performance and connectivity. VL-Bus takes advantage of a wider, faster pipeline between your system's CPU and peripheral devices. This adapter supports 8-bit SCSI via internal and external 50-pin connectors. No floppy support is available.
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DownloadsDocumentationTechnical Specifications

Note: Only drivers that are not included or embedded within a supported operating system are listed below. To see a complete list of supported operating systems see the Product Specifications

Select your operating system or software below

Bios Updates and Other Downloadable Files

Bios Updates and Other Downloads




Microsoft Windows NT

Novell NetWare

Novell NetWare Downloads


SCO Unix

Hardware Installation
2840 hang fix (html 68 kb)
Installing Drivers or Software
cd install netware 401 (html 68 kb)
cdrom in dos (html 68 kb)
unix driver disk conversion (html 69 kb)
loading adaptec dsk drivers (html 71 kb)
netware 3.12 cd install (html 68 kb)
Product Documentation
Install Guide for the AHA-2840A/2842A (PDF 145 KB)
Use Your Product
scsi<i>select</i> user's guide (html 83 kb)
scsi terms explained (html 77 kb)
sense codes described (html 96 kb)
Number of devices
7 SCSI devices

Bus System Interface Type

32 Bit for VL (VESA Local Bus) based computers
External Connectors
50-pin high density
Internal Connectors
Data Transfer Rate
Up to 40 MBytes/sec on the VL-BusUp to 10 MBytes/sec synchronous Fast SCSI data rate
Package Contents
AHA-2840A adapterAdaptec EZ-SCSI v3.1 (for DOS/Windows)ASW-7700 v2.02Internal SCSI ribbon cable and documentation

Board Dimensions

9.8" L x 0.44" W x 3.75"H
Standard VL-Bus compatible form factor

Power Consumption

+5.0 +/- 0.25 Volts at 2.0 Amps maximum

Operating Characteristics

32° to 131° F (0° to 55° C)

Storage Characteristics

-40° to 167° F (-40° to 75°C)