DiskCountersView displays the system counters of each disk drive in your system, including the total number of read/write operations and the total number of read/write bytes. It also displays general drive information, like disk name, partition number, partition location, and so on.
This utility works on Windows XP,2003, 2008, Vista, and Windows 7.
Windows 2000 is also partly supported, but if you have one disk with multiple partitions, all partitions will be displayed with the same counters.
Download: DiskCountersView 1.00