US PATENT SUBCLASS 711 / 112
.~.~.~ Direct access storage device (DASD)

Current as of: June, 1999
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711 /   HD   ELECTRICAL COMPUTERS AND DIGITAL PROCESSING SYSTEMS: MEMORY

100  DF  STORAGE ACCESSING AND CONTROL {6}
101  DF  .~ Specific memory composition {8}
111  DF  .~.~ Accessing dynamic storage device {1}
112.~.~.~ Direct access storage device (DASD) {2}
113  DF  .~.~.~.~> Caching
114  DF  .~.~.~.~> Arrayed (e.g., RAIDs)

DEFINITION

Classification: 711/112

Direct access storage device (DASD):

(under subclass 111) Subject matter wherein devices employing a medium capable of being accessed directly and by so doing skipping past portions of the medium.

(1) Note. For purposes of this definition, memory devices known typically as disks, drums, etc., are considered to be of the direct access type whereas tapes are not.