SSD Performance HD Tach 3.0.4.0

HD Tach 3.0.4.0

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.

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.

With this test we NEVER reach advertised speeds. The V128 is pushing 224 MB/sec and considering the fastest drive we ever tested did 234 MB/sec I'd say that's rock solid performance !

When we look at write performance we again see the 32nm take a bit of a beating, still close to 170 MB/sec is pretty darn sweet.

In addition to sequential read performance, 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. Also again, without a physical head that needs moving around, the SSDs are just so fast as they have no mechanical moving parts. Here obviously .. the smaller number is better, 0.1 ms (!).

Here's a little test report of HDTach in both a long READ and WRITE sequence as well as noting CPU load and Burst speed.