HD Tach was a software program for Microsoft Windows (2000 or XP) that tests the sequential read, random access and interface burst speeds of the attached storage device (hard drive, flash drive, removable drive etc.). Drive technologies such as SCSI, IDE/ATA, IEEE 1394, USB, SATA and RAID are supported.
As of September 2011, the latest version of this application (3.0.4.0) is still not fully compatible with Windows Vista or Windows 7. However, HD Tach works in Vista and 7 64-bit by running it in Windows XP SP2 compatibility mode.
On December 5, 2011, citing the lack of time to devote to the project, Simpli Software formally announced on its website that HD Tach has reached end-of-life and is no longer being supported.
Read more about HD Tach: History