Change a Dynamic Disk Back to a Basic Disk Applies To: Windows 7, Windows Server 2008 R2 Basic disks support only primary partitions, extended partitions, and logical drives. Basic disks have been supported in operating systems since MS-DOS, while dynamic disks have been supported in operating systems since Windows 2000. Backup Operators or Administrator is the minimum membership required. Note The decision to convert a dynamic disk to a basic disk has implications that should be considered carefully. For more information about basic and dynamic disks and how to choose which type to use, see https://www.microsoft.com/en-US/download/details.aspx?id=53314