Atto ExpressPCI UL5D LP Driver Download (Official)

Atto Technology Drivers

The ExpressPCI UL5D LP is a disk drive controller manufactured by Atto Technology. This driver fixes problems with drive not found, slow or unreliable data transfer, intermittent connection or hardware conflicts. This version of "winxpx86_drv_epciu320_300.exe" has been downloaded 85 times with a user rating of 5 out of 5 stars, based on 5 reviews. It is compatible with PCs running Windows XP, among other operating systems. The total disk space used for this update is 145.4 KB.

5 Ratings

Supported Models

ExpressPCI UL5D LP


ATTO ExpressPCI 4DRO SCSI Adapter

ATTO ExpressPCI 4SRO SCSI Adapter

ATTO ExpressPCI 5DRO LP SCSI Adapter

ATTO ExpressPCI 5DRO SCSI Adapter

ATTO ExpressPCI UL4D SCSI Adapter

ATTO ExpressPCI UL4S SCSI Adapter



Supported Operating Systems

Windows XP

File Name


3.001.20 (2005-01-03) via .inf (2006-07-21) via .inf

Additional Notes

Dual-Channel Low-Profile Ultra320 SCSI PCIe Host Adapter

Uploaded By

Sathishkumar (DG Staff Member) on 14-Aug-2009

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
ATTOMTLN.INF 1.1 KB 3 Jan 2005
Contents.txt 1.5 KB 12 Jun 2006
ELT-1MB.reg 1.5 KB 12 Jan 2005
ELT-256K.reg 1.5 KB 23 Feb 2005
ELT-64K.reg 1.5 KB 12 Jan 2005
ELT-unl.reg 1.5 KB 12 Jan 2005
Express2 41 bytes 12 Jan 2005
Express2.inf 4.7 KB 21 Jul 2006
Latency.reg 542 bytes 2 Apr 2003
Makedisk.bat 291 bytes 5 Mar 2006
Makedisk.exe 16.4 KB 24 May 2005
Perform.txt 5.9 KB 12 Jun 2006
Readme.txt 1.3 KB 12 Jun 2006
Registry.txt 1.6 KB 12 Jan 2005
Setup.exe 69.6 KB 24 May 2006
TXTSETUP.OEM 782 bytes 27 Jun 2006
WinSrv03.txt 7.5 KB 11 May 2005
Win_2000.txt 7.5 KB 11 May 2005
Win_XP.txt 7.5 KB 11 May 2005 9.3 KB 30 Nov 2006 9.7 KB 30 Nov 2006
express2.sys 60.9 KB 21 Jul 2006

How to Update ExpressPCI UL5D LP Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the ExpressPCI UL5D LP 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 Atto ExpressPCI UL5D LP 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 Atto 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 Atto 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 Atto. All company names/logos are properties of their owners.
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