HD Tach is described as 'Low level hardware benchmark for random access read/write storage devices such as hard drives, removable drives (ZIP/JAZZ), flash devices, and RAID arrays. HD Tach uses custom device drivers and other low level Windows interfaces to bypass as many layers of software' and is a Benchmark tool in the os & utilities category. There are more than 10 alternatives to HD Tach for Windows, Web-based, PortableApps.com and Mac. The best HD Tach alternative is CrystalDiskMark, which is both free and Open Source. Other great apps like HD Tach are HD Tune, UserBenchMark, Macrorit Disk Scanner and ATTO Disk Benchmark.