Used to compare disks and to provide specific information about a disk. It shows how much time the processor is spending servicing disk requests. Disk bytes per second shows how fast your disk is. Copy a big file and see if your disk is way fast or a piece of junk. Average disk bytes per transfer shows how big the average transfer is.
Larger transfers are more efficient.
Current Disk queue length shows how much data is waiting to be transferred to disk. A long queue means you need a faster disk. Is installed by adding Network monitor tools and agent through the services tab of the network icon in control panel. Can provide real time and cumulative saved data. Session statistics shows cumulative data about conversations taking place on the network in real time.