Dell 303s9a04 Driver Download (Official)

Dell Drivers

The 303s9a04 is a disk drive controller manufactured by Dell. This driver fixes problems with drive not found, slow or unreliable data transfer, intermittent connection or hardware conflicts. Visitors have downloaded this file "303s9a04.exe" 33 times with an aggregate rating of 5 out of 5 stars based on 2 reviews. Compatibility for this driver update includes PCs running Windows operating systems such as Windows XP. The total disk space used for this update is 374.9 KB.

2 Ratings

Supported Models


Adaptec AHA-294xU2/295xU2/395xU2/AIC-789x PCI SCSI Controller(NT 4.0)

Adaptec AHA290x/291x/294x/394x/4944/AIC78xx PCI SCSI Controller(NT 4.0)




Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows NT4

File Name

Additional Notes


scsi-non-raid Driver File

Uploaded By

Alagappan (DG Staff Member) on 3-Feb-2005

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
WINNT/README.TXT 22.0 KB 22 May 2000
WINNT/4_0/ULTRA2/aic78u2.inf 7.0 KB 22 Jun 2000
WINNT/4_0/ULTRA2/AIC78U2.DBG 28.6 KB 7 Mar 2000
WINNT/4_0/ULTRA2/AIC78U2.SYS 75.8 KB 16 Sep 1999
WINNT/4_0/ULTRA/AIC78XX.DBG 24.7 KB 7 Mar 2000
WINNT/4_0/ULTRA/aic78xx.inf 7.0 KB 22 Jun 2000
WINNT/4_0/ULTRA/AIC78XX.SYS 63.7 KB 16 Sep 1999
README.TXT 2.1 KB 22 Jun 2000
TXTSETUP.OEM 682 bytes 17 May 2000
NETWARE/AIC78U2.HAM 140.3 KB 24 Apr 2000
NETWARE/AHA2940.DDI 6.6 KB 17 Nov 1999
NETWARE/AIC78U2.DDI 7.5 KB 22 May 2000
NETWARE/NWASPI.CDM 15.0 KB 25 Apr 2000
NETWARE/AHA2940.HAM 109.0 KB 25 Apr 2000
DISK1 33 bytes 16 Sep 1999
DOS/READDOS.TXT 6.2 KB 16 Sep 1999
DOS/ASPI8DOS.SYS 37.8 KB 14 Sep 1999
DOS/ASPI8U2.SYS 40.8 KB 16 Sep 1999
DOS/ASPICD.SYS 29.6 KB 16 Sep 1999

How to Update 303s9a04 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the 303s9a04 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 Dell 303s9a04 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 Dell 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 Dell 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 Dell. All company names/logos are properties of their owners.
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