Go  
Home  Support  SCSI Host Adapters  AHA-3940
leftbar
leftbar
AHA-3940
Adaptec's AHA-3940 and AHA-3940W MultiChannel host adapters are designed for use in computers that have 5-volt Peripheral Component Interconnect (PCI) interface slots. Each AHA-3940 and AHA-3940W MultiChannel host adapter has two SCSI channels, each of which functions as an independent host adapter. Channel A has both an internal and an external SCSI connector; Channel B has only an internal SCSI connector. With the AHA-3940, you can connect up to seven 8-bit SCSI devices per channel. With the AHA-3940W, you can connect up to fifteen 16-bit (Wide) SCSI devices per channel.
Small image of the AHA-3940
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

IBM OS

IBM OS-2

Microsoft

Microsoft DOS
Microsoft Windows 2000
Microsoft Windows 3.1x
Microsoft Windows 7
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows Millennium
Microsoft Windows NT
Microsoft Windows Server 2008
Microsoft Windows Vista

Novell NetWare

Novell NetWare Downloads

Unix

SCO Unix
SCO UnixWare

Hardware Installation
How to Install Your Adaptec PCI Card (HTML 80 KB)
PCI Architecture Overview (HTML 80 KB)
Installing Drivers or Software
CD install Netware 401 (HTML 75 KB)
7800 Netware instructions (HTML 87 KB)
7800 Family Manager Set 98 Contents (HTML 74 KB)
Installing 98 driver (HTML 76 KB)
Windows 98 issues (HTML 76 KB)
7800 Miniport Issues in 95 (HTML 76 KB)
Installing Windows NT Driver (HTML 89 KB)
7800 supported adapters (HTML 78 KB)
AIC7870.dsk options (HTML 82 KB)
7800 Netware contents (HTML 77 KB)
7800 issues for Netware (HTML 78 KB)
7800 Netware Notes (HTML 76 KB)
Miniport Options (HTML 76 KB)
2940 WinNT 3.x (HTML 76 KB)
7800 Diskette Contents (HTML 75 KB)
OS/2 driver installation (HTML 75 KB)
UNIX Driver Disk Conversion (HTML 75 KB)
Loading Adaptec DSK Drivers (HTML 78 KB)
netware 3.12 cd install (HTML 75 KB)
7800 UNIX Driver Instructions (HTML 82 KB)
OS/2 driver Notes (HTML 83 KB)
7800 OS/2 diskette (HTML 75 KB)
7800 os/2 issues (HTML 75 KB)
SCO Unix Driver Installation (HTML 81 KB)
Interoperability
7800 FMS Support list (HTML 78 KB)
3940 PCI Bridge List (HTML 83 KB)
Product Documentation
Install Guide for the AHA-3940/3940W (PDF 148 KB)
User Guide for the AHA-3940/3940W (PDF 577 KB)
Use Your Product
SCSI<i>Select</i> User's Guide (HTML 89 KB)
SCSI Terms Explained (HTML 84 KB)
Sense Codes Described (HTML 103 KB)
Number of devices
Up to 7 devices under DOS 5.0 and above

Bus System Interface Type
PCI Local Bus
Data Transfer Rate
20 Mbytes/sec (10 Mbytes/sec per channel) Two channel Fast SCSI-2
Package Contents
AHA-3940 or AHA-3940W PCI MultiChannel host adapterSCSISelect configuration softwareAdaptec EZ-SCSI software for DOS and WindowsAdaptec 7800 Family Manager Set softwareDevice support for hard disk, removable, MO, CD-ROM, Photo CD, tape, DAT, scanner, and Floptical® drivesAdaptec CI/O Single Server software for NetWare network serversSytron's Proserve CX Lite™ - tape backup software for NetWareComplete hardware and software documentationInternal SCSI ribbon cables (external cable not included)
Warranty
5 year

Supported Protocols

8-bit Fast SCSI-2

Advanced SCSI Features

  • Advanced SCSI Programming Interface (ASPI) compliant
  • Multitasking operating system support (through scatter/gather, disconnect/reconnect, tagged command queuing support)
  • Independent negotiation of high-speed data transfers (Fast, Wide, and synchronous) with each device
  • Support for 255 simultaneous active SCSI commands per channel

SCSI channels

Two fully independent PCI SCSI channels bridged to system PCI bus

Electrical drivers

Single-ended and active. Each channel is programmable via SCSISelect

Board Dimensions

6.875" x 4.0"

Power Consumption

5 V +/- 5% at 2.0 amps maximum

Operating Characteristics

32° F to 131° F (0° C to 55° C)10% to 95% Relative Humidity, non condensing

Storage Characteristics

-67° F to 185° F (-65° C to 105° C)
---

rightbar
rightbar