Adaptec AHA-2940U2/U2W - Ultra2 SCSI Driver Download

Adaptec Drivers

The AHA-2940U2/U2W - Ultra2 SCSI is a disk drive controller manufactured by Adaptec. This driver fixes problems with drive not found, slow or unreliable data transfer, intermittent connection or hardware conflicts. This driver - "" - has been downloaded 7,355 times and is rated 5 out of 5 stars based on 55 reviews. It has been installed successfully by our users on PCs running Windows Vista and Windows XP. The total disk space used for this update is 674.0 KB.

55 Ratings (see all reviews)

Supported Models

Adaptec AIC-7870 PCI SCSI Controller

Adaptec AIC-755x PCI SCSI Controller

Adaptec AHA-2930CU PCI SCSI Controller

Adaptec AHA-2930UW PCI SCSI Controller

Adaptec AHA-2940/AHA-2940W PCI SCSI Controller

Adaptec AHA-2940AU PCI SCSI Controller

Adaptec AHA-2940U/AHA-2940UW PCI SCSI Controller



Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows NT4, Windows 95

File Name


3.7 (2000-10-01) via .inf
3.10 (2000-08-08) via .inf
4.2 (2001-02-21) via .inf
4.2 (2001-02-21) via .inf

Additional Notes


and other cards !

Uploaded By

seb (DG Member) on 9-Jul-2002

Most Helpful Reviews

5 of 6 people found the following review helpful:
Tony H.
Tested on Windows XP
22 Jan 2006

Installation: 4 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
"I bought a used Adaptec AHA-2940U2W - Ultra2 SCSI

PCI Card to run my ATLAS10K2-TY184L SCSI Disk and

this driver is just what I was looking for, thanks.

Tony H."

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See all Adaptec AHA-2940U2/U2W - Ultra2 SCSI ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
READDOS.TXT 8.2 KB 28 Mar 2001
WIN2000/ULTRA160/ADPU160M.CAT 8.6 KB 12 Sep 2001
WIN2000/ULTRA160/ADPU160M.SYS 91.3 KB 21 Feb 2001
WIN2000/ULTRA160/ADPU160M.INF 6.4 KB 13 Apr 2001
WIN2000/ULTRA2/AIC78U2.CAT 8.6 KB 12 Sep 2001
WIN2000/ULTRA2/AIC78U2.INF 6.1 KB 13 Apr 2001
WIN2000/ULTRA2/AIC78U2.SYS 71.8 KB 8 Aug 2000
WIN2000/ADF6U160/ADF6U160.CAT 8.6 KB 12 Sep 2001
WIN2000/ADF6U160/ADF6U160.SYS 91.3 KB 21 Feb 2001
WIN2000/ADF6U160/ADF6U160.INF 4.8 KB 13 Apr 2001
Win98_ME/Ultra160/ADPU160M.CAT 7.8 KB 12 Sep 2001
Win98_ME/Ultra160/ADPU160M.INF 2.8 KB 17 Nov 2000
Win98_ME/Ultra160/ADPU160M.MPD 89.6 KB 25 Oct 2000
README.TXT 6.3 KB 13 Apr 2001
W2KDSK1 42 bytes 9 Feb 2001
TXTSETUP.OEM 1.9 KB 14 Mar 2001
ASPI8DOS.SYS 38.0 KB 16 Sep 1999
ASPI8U2.SYS 44.9 KB 6 Dec 1999
NETWARE/ADPT160M.HAM 131.4 KB 30 Nov 2000
NETWARE/AIC78U2.HAM 120.1 KB 30 Nov 2000
NETWARE/AHA2940.DDI 9.9 KB 12 Dec 2000
NETWARE/ADPT160M.DDI 7.4 KB 30 Nov 2000
NETWARE/AIC78U2.DDI 8.2 KB 3 Apr 2000
NETWARE/AHA2940.HAM 135.7 KB 30 Nov 2000
DISK1 42 bytes 9 Feb 2001
Win95/Ultra/AIC78XX.INF 13.3 KB 21 Jun 2000
Win95/Ultra/AIC78XX.MPD 70.1 KB 7 Aug 2000
Win95/Ultra/ADPINSTR.VXD 17.6 KB 16 Sep 1999
Win95/Ultra/AIC78XX.CAT 33 bytes 16 Sep 1999
ASPICD.SYS 29.6 KB 22 Sep 1998
U160DSK1 42 bytes 8 Feb 2001
NT4/ULTRA160/HOTP160M.REG 363 bytes 12 Jun 1999
NT4/ULTRA160/ADPU160M.SYS 96.4 KB 8 Aug 2000
NT4/ULTRA160/ADPU160M.INF 5.5 KB 28 Oct 1999
NT4/ULTRA2/AIC78U2.INF 15.9 KB 20 Jun 2000
NT4/ULTRA2/AIC78U2.SYS 82.9 KB 8 Aug 2000
NT4/ULTRA/AIC78XX.INF 16.0 KB 20 Jun 2000
NT4/ULTRA/AIC78XX.SYS 69.3 KB 7 Aug 2000

How to Update Adaptec AHA-2940U2/U2W - Ultra2 SCSI Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the Adaptec AHA-2940U2/U2W - Ultra2 SCSI driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Adaptec AHA-2940U2/U2W - Ultra2 SCSI into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Adaptec Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Adaptec website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with Adaptec. All company names/logos are properties of their owners.
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