basic disk

A physical disk that contains primary partitions, extended partitions, or logical drives. Basic disks can be accessed by all versions of Windows, MS-DOS, and Windows NT.  Basic disks can contain up to four primary partitions, or three primary partitions and an extended partition with multiple logical drives. Upgrading a basic disk to dynamic disk will render the entire disk unreadable to operating systems other than Windows 2000.

Contrast with dynamic disk.

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