System and method to guarantee overwrite of expired data in...

Details System and method to guarantee overwrite of expired data in... System and method to guarantee overwrite of expired data in...

2006-01-03

2006-01-03

Sparks, Donald (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S004000, C711S112000, C711S133000, C711S136000, C711S160000

Reexamination Certificate

active

06983351

ABSTRACT:
A system and method for guaranteeing overwrite of expired data in a media device, the data being organized according to logical units provided on media devices organized as physical volumes. The method comprises the steps of: maintaining information associated with a status of a physical volume, and updating a physical volume's status information based upon a combination of that volume's prior status and that volume's current status; specifying a time duration that expired logical unit data may remain on a physical volume; based upon the volume's updated status information, determining whether a selected volume has expired data longer than the specified time duration; and, overwriting contents of the volume having data that has expired longer than the specified time duration.

REFERENCES:
patent: 6289425 (2001-09-01), Blendermann et al.
patent: 6405284 (2002-06-01), Bridge
patent: 6513101 (2003-01-01), Fisher et al.
patent: 6658526 (2003-12-01), Nguyen et al.

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