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Adaptec's Fastest EISA SCSI I/O solution ever for servers and performance workstations. The AHA-2742 is a bus mastering EISA-to-Fast SCSI host adapter with a floppy controller. It supports seven SCSI devices internally and/or externally.
Small Image of AHA-2742
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

Installing Drivers or Software
cd install netware 401 (html 69 kb)
cdrom in dos (html 69 kb)
loading adaptec dsk drivers (html 71 kb)
netware 3.12 cd install (html 68 kb)
Product Documentation
User Manual for the AHA-2740/2742 (PDF 495 KB)
Install Guide for the AHA-2740/2742 (PDF 64 KB)
Use Your Product
scsi terms explained (html 77 kb)
sense codes described (html 96 kb)
Supported Operating Systems
IBM OS/2 1.3x
IBM OS/2 2.x
Microsoft MS-DOS 3.x
Microsoft MS-DOS 4.x
Microsoft MS-DOS 5.x
Microsoft MS-DOS 6.x
Microsoft Windows 3.10
Microsoft Windows 95
Microsoft Windows 95a
Microsoft Windows 95b
Microsoft Windows 95c
Microsoft Windows for Workgroups 3.11
Microsoft Windows NT 3.51
Microsoft Windows NT 4.0
Novell NetWare 3.10
Novell NetWare 3.11
Novell NetWare 3.12
Novell NetWare 3.2
Novell NetWare 4.0
Novell NetWare 4.01
Novell NetWare 4.10
Novell NetWare 4.11
Novell NetWare 4.12
Novell NetWare 4.20
SCO Unix
Number of devices
7 SCSI devices

Bus System Interface Type

32-bit EISA
External Connectors
50-pin high density
Internal Connectors
50-pin standard
Data Transfer Rate
Up to 33 MBytes/sec bus master DMA transfer rate burst on the EISA bus, up to 2 MBytes/sec asynchronous, 5 MBytes/sec synchronous
10 MBytes/sec fast synchronous (Fast SCSI) on the SCSI bus
System Requirements
IBM compatible PC with an available EISA slot
Package Contents
AHA-2742 Host Adapter
Configuration Software
Installation Guide
5 years

Floppy Support

The AHA-2742 does provide floppy support

Board Dimensions

7" x 5"(17.8 cm x 12.7 cm)

Power Consumption

+5.0 +/= 0.25 Volts at 2.0 amps maximum

Operating Characteristics

0°C to 55°(32°F to 131°F)
10% to 95% non-condensing relative humidity

Storage Characteristics

-40°C to 75°C (-40°F to 167°F)

MTBF (mean time between failures, Bellcore)

110,000 hours