HD Tach 184.108.40.206 info: HD Tach is a physical performance hard drive test that uses a special kernel mode VXD to get
maximum accuracy by bypassing the file system. A similar mechanism is used in Windows NT/2000.
The HD Tach sequential read test is a little bit different from other benchmarks. Most
benchmarks create a file on the hard drive and test within that file.
The problem is that modern hard drives use a zone bit recording technique that allows
different read speeds depending on where the data is located. Data on the outside of the drive
is much faster than data recorded on the inside.
HD Tach reads from areas all over the hard drive and reports an average speed. It also logs
the read speeds to a text file that you can load into a spreadsheet and graph to visually read
the results of the test.
In addition to sequential read, HD Tach tests the drive's random access time. Random access is
the true measure of seek speed. Many drives advertise sub 10 millisecond seek speeds, but seek
speeds are misleading.
Finally, HD Tach tests the drive burst speed. The burst speed is the speed that data can be
accessed from the drive's on-board read-ahead memory. This measures the speed of the drive and
The non-commercial version of HD Tach gives you access to all the functionality, ease of use
and reliable benchmarking you expect from HD Tach. In addtion, we have added the ability to
save benchmark results and graph your saved benchmark results against previous results or
results from the new, included, drive database...