Drive Activity

Drive Activity is a Vista gadget that shows the workload of your hard drives right on your screen. It is very simple to install and set up, as it comes packed with few settings.
The interface is represented by a small frame that you can move to any position on the screen with the help of the mouse cursor.
You can view the workload of each drive, as well as make adjustments when it comes to the query and history type. Furthermore, it is possible to opt out of specific drives for display.
There are no other options available through this gadget. However, thanks to the built-in Windows features, you can set the frame to stay on top of other windows, as well as change its opacity level to a preset value, ranging between 20% and 100%.
The simple-to-use utility is very low-demanding when it comes to CPU and RAM, so it doesn't slow down overall performance. It has a good refresh rate and displays accurate information. No error dialogs were shown in our tests, and the app did not hang or crash. Thanks to its intuitive layout and overall simplicity, even first-time users can quickly figure out Drive Activity.