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:
Feb. 02, 1999
Filed:
Oct. 27, 1995
Detlef Jenett, Erfurt, DE;
SCM Microsystems (U.S.) Inc., Los Gatos, CA (US);
Abstract
A system and method of cleaning up a full erase unit in a flash translation layer, including moving all valid blocks on the full erase unit to a corresponding address location on a predetermined transfer unit, and then erasing the contents of the full erase unit. After erasure, the formerly full erase unit is redesignated to become the next transfer unit to which the contents of the next full unit will be transferred. The method also includes determining whether a criterion has been met for cleanup to be undertaken. The criteria for undertaking cleanup includes determining whether the number of free blocks is greater than a threshold which is a function of twice the number of bad blocks in the transfer erase unit plus twice the number of flash translation layer structure blocks in the full erase unit.