HD Tach will test the sequential read, random access and interface burst speeds of your attached storage device (hard drive, flash drive, removable drive, etc). All drive technologies such as SCSI, IDE/ATA, 1394, USB, SATA and RAID are supported. Test results from HD Tach can be used to confirm manufacturer specs, analyze your system for proper performance, and compare your performance with others. HD Tach is very easy to use, quick, and presents data in easy to read graphs, including the ability to compare two storage devices on screen at the same time for easy analysis.
HDTach is one of the standards in storage testing and we quickly see more big increases for the new OCZ 64GB SATA-II SSD over the previous SATA-I version we tested last month. The burst speed has jumped up from 59.8 MB/s to 108.2 MB/s, an 80% boost, though it still is much slower than the 247 MB/s we saw from the Western Digital VelociRaptor drive and is still slower than the platter-based WD Scorpio 2.5″ drive.
The average transfer speeds also increase very dramatically with the OCZ 64GB SATA-II SSD over the previous model – write speeds are nearly 3x faster! And of course the random access time of the SSD drive is just draw-dropping when compared to even the fastest standard platter-based hard drives.