A hard disk that can be accessed by DOS and Windows. Basic disks can have up to four primary partitions, or three primary partitions and one extended partition. Within an extended partition you can create unlimited additional subdivisions called logical partitions.
A basic disk adheres to the partition-oriented scheme of Windows NT, Windows 95/98, and MS-DOS. Basic disks can also contain RAID volumes that were created in NT Disk Administrator, including spanned volumes (volume sets), mirrored volumes (mirror sets), striped volumes (stripe sets), and RAID-5 volumes (stripe sets with parity). In addition, CD-ROMs and other removable-media disks are considered basic disks.