The Deskband for displaying drive activity shows the read and write accesses on the computer. You can see the read and write operations currently being run on any drive displayed in the taskbar. A search on the respective drive can be started by right-clicking.
You can show the Deskband for drive activity by right-clicking on the O&O Defrag icon in the task tray, Show drive activity. You can also hide the drive activity again by clicking on Close drive activity.