Atto ExpressSAS H644 Driver Download (Official)

10 Ratings

Supported Models

ExpressSAS H644 Driver

ATTO Empty LUN Driver

ATTO ExpressSAS H608 Host Adapter Driver

ATTO ExpressSAS H60F Host Adapter Driver

ATTO ExpressSAS H644 Host Adapter Driver

ATTO ExpressSAS H680 Host Adapter Driver

ATTO ExpressSAS H6F0 Host Adapter Driver

ATTO ExpressSAS SCSI Enclosure Processor Driver

ATTO Phantom Device Driver

ATTO Unpopulated Channel Driver



Supported Operating Systems

Windows 2008 (64 bit), Windows Vista (64 bit), Windows 2003 (64 bit), Windows XP (64 bit)

File Name

winx64_drv_esashba2_110.exe (674.3 KB)


1.10 (24-Mar-2009) (2009-03-20) via .inf (2008-03-25) via .inf

Find Related Drivers

Uploader Notes

4-Internal/4-External Port 6-Gb SAS/SATA II PCIe 2.0 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
Setup.exe 456.7 KB 18 Aug 2008 8.4 KB 20 Mar 2009
attomtln.inf 2.3 KB 25 Mar 2008
esas2hba 39 bytes 6 Aug 2008 8.8 KB 20 Mar 2009
esas2hba.inf 3.5 KB 20 Mar 2009
esas2hba.sys 724.5 KB 20 Mar 2009
makedisk.bat 936 bytes 6 Aug 2008
makedisk.exe 16.4 KB 15 Oct 2006
txtsetup.oem 750 bytes 2 Sep 2008

How to Update ExpressSAS H644 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the ExpressSAS H644 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 ExpressSAS H644 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 Driver Update Utility for ExpressSAS H644. 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 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.

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