A CDE Definition
A reserved part of a storage drive (hard disk, SSD) that is treated as a separate drive. A single drive is also assigned a partition that takes up all the space. For example, older Windows PCs came with the entire disk partitioned as drive C:. New Windows PCs often come with the storage drive partitioned into C: and D: drives. The C: drive is the main drive, and the D: drive contains a recovery system in the event Windows has to be re-installed. In addition, users may wish to have several drives for organizational purposes, and utility programs come with every computer for adding and modifying partitions. See primary partition, extended partition, basic disk and dynamic disk.
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