The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 1978
Filed:
May. 25, 1976
Donald O Smith, Lexington, MA (US);
Kenneth J Harte, Carlisle, MA (US);
Hollister B Sykes, Cranford, NJ (US);
Control Data Corporation, Minneapolis, MN (US);
Abstract
A data recording and readback subsystem for digital computer systems employing random access electron beam memories having an electron beam write/read apparatus for recording data to be stored on a recording member that is subject to fatigue in the eventuality of excessive write/read storage operations at any given physical location on the recording member. The improved method and apparatus for data management comprising systematically permuting the physical location of data stored on the recording member, recording each permutation of the data, deriving signals representative of the number of permutation operations, and combining programmer initiated requests from the computer system central processing unit for data stored in the electron beam memory with the signals representative of the number of permutations to derive an actual physical address signal for application to the electron beam memory for recovery of the requested data.