Patent · US Active

Reducing occupancy of digital storage devices

US8327061B2 · kind B2 · utility

5Cited by

11References

22Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Manfred Boldy · Weingarten, DE
Peter Sander · Hamburg, DE
Hermann Stamm-Wilbrandt · Eberbach, DE

Key dates

Filing date	Sep 28, 2010
Grant date	Dec 4, 2012
Priority date	—
Expiry date	Oct 9, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG11B20/12
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A digital data storage device physically stores blocks of identical data only once on its storage medium wherein a second or even further identical blocks are stored only as reference referring to the first block of these identical blocks. By this technique, storage of duplicate data is most effectively avoided on the lowest storage level of the disk storage device, even in cases where identical blocks are written by different operating Systems. In the preferred embodiment, the underlying storage medium (magnetic hard disk, optical disk, tape, or M-RAM) is segmented into two areas, the first area particularly comprising a relatively small block reference table and the remaining physical storage area for storing real blocks of information.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.