The WinNT Promise FastTrak100 (TM) Lite Controller Windows Driver is a software component that enables communication between a Promise FastTrak100 Lite controller card and the Windows operating system. The Promise FastTrak100 Lite is a hardware RAID (Redundant Array of Independent Disks) controller card that supports multiple hard drives and can manage them in different RAID configurations, providing increased performance, data redundancy, and data safety for the connected storage devices.

The driver is necessary for Windows to recognize and interact with the FastTrak100 Lite controller. Without this driver, the controller card may not work properly, and your RAID array may not be accessible.