The Intel RST VMD Managed Controller 09AB is a Windows driver associated with Intel Rapid Storage Technology (Intel RST). This controller is specifically used in systems that utilize Intel VMD (Volume Management Device) technology. Intel RST is a collection of drivers and software that enables advanced storage management on Intel chipsets, primarily focused on improving the performance and reliability of storage devices (like SSDs and hard drives) by using RAID (Redundant Array of Independent Disks) configurations, optimizing disk access, and enabling features like disk caching and drive health monitoring.