How fast are my disks really? Disk Bench tests your hard drive speed in a real life situation not in a benchmarking environment. All it does is copies a file from A to B, times the time it took, and deletes the file from B again.The program is using the current filesystem to save a file. If it is fragmented, the performance will be degraded, as it is in real life.So, to figure out how fast your computer is, you can copy a file from A to B and use a stop watch.Or you could just as easily use this program.