Atto ExpressSAS H644 Driver Download (Official)

Atto Technology Drivers

The ExpressSAS H644 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 update - "winx86_drv_esashba2_110.exe" - has an average rating of 5 out of 5 stars based on 8 reviews, and has been downloaded 29 times. Compatibility for this driver update includes PCs running Windows operating systems such as Windows Vista and Windows XP. The total disk space used for this update is 977.4 KB.

Atto ExpressSAS H644 Automatic Driver Update Utility
8 Ratings

Supported Models

ExpressSAS H644


ATTO ExpressSAS H608 Host Adapter

ATTO ExpressSAS H60F Host Adapter

ATTO ExpressSAS H644 Host Adapter

ATTO ExpressSAS H680 Host Adapter

ATTO ExpressSAS H6F0 Host Adapter

ATTO ExpressSAS SCSI Enclosure Processor



Supported Operating Systems

Windows 2008, Windows Vista, Windows 2003, Windows XP

File Name


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

Additional Notes

4-Internal/4-External Port 6-Gb SAS/SATA II PCIe 2.0 Host Adapter

Uploaded By

Sathishkumar (DG Staff Member) on 17-Aug-2009

How to Update ExpressSAS H644 Device Drivers

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 Atto 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 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

Installing your newly downloaded driver is a straightforward process. Windows provides a dedicated tool called Device Manager for this purpose. Follow these steps to update your driver:

  1. Access the Quick Access menu by right-clicking the Start button.

  2. From the menu options, choose "Device Manager".

  3. Within Device Manager, identify the device requiring the driver update.

  4. Open the context menu for the device by right-clicking its name.

  5. Select "Update driver" and proceed through the guided installation.

To complete the process, reboot your computer. This ensures the new driver is fully integrated into your system.

Regular driver updates contribute to optimal system performance and hardware compatibility.

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.

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
Setup.exe 342.0 KB 18 Aug 2008
Storport/ 8.8 KB 20 Mar 2009
Storport/esas2hba.inf 3.5 KB 20 Mar 2009
Storport/esas2hba.sys 723.5 KB 20 Mar 2009
Storport/makedisk.bat 956 bytes 6 Aug 2008
Storport/makedisk.exe 16.4 KB 15 Oct 2006 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 723.5 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
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