| hard disk (In contrast to ). One or more rigid rotating about a central axle with associated read/write heads and electronics, used to store data. Most hard disks are permanently connected to the drive (fixed disks) though there are also . High speed disks have an of 28 milliseconds or less, and low-speed disks run 65 milliseconds or more. The higher speed disks also transfer their data faster than the slower speed units. Each surface of each disk is divided into a number of evenly spaced concentric circular . The set of all tracks at a given radius on all surfaces (the tracks which can be accessed without moving the heads) are known as a . Each track is divided into . Disk drives are commonly characterised by the kind of interface used to connect to the computer, e.g. , , . See also . {Suchanka's PC-DISK library (http://www.pc-disk.de/)}. (1999-01-07) |
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