It's good to know the speed of reading and copy hard disk to determine the condition and performance of your hard disk. For example, some antivirus programs that keep the process running in the background to read and write some data to the hard disk.
Speedometer Drive is a free softwrae which can help to monitor the speed of reading and writing on a computer hard disk that diseimpan in the system tray. This application uses the Windows Performance Counters to display the speed of reading and writing hard disk.
