C# Definition:

public enum MEDIA_TYPE : uint
{
   Unknown,
   F5_1Pt2_512,
   F3_1Pt44_512,
   F3_2Pt88_512,
   F3_20Pt8_512,
   F3_720_512,
   F5_360_512,
   F5_320_512,
   F5_320_1024,
   F5_180_512,
   F5_160_512,
   RemovableMedia,
   FixedMedia,
   F3_120M_512,
   F3_640_512,
   F5_640_512,
   F5_720_512,
   F3_1Pt2_512,
   F3_1Pt23_1024,
   F5_1Pt23_1024,
   F3_128Mb_512,
   F3_230Mb_512,
   F8_256_128,
   F3_200Mb_512,
   F3_240M_512,
   F3_32M_512
}

Notes:

Used in DISK_GEOMETRY.