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:
Nov. 21, 2006
Filed:
Dec. 30, 2003
Alan David Bennett, Edinburgh, GB;
Alan Douglas Bryce, Edinburgh, GB;
Sergey Gorobets, Edinburgh, GB;
Alan Welsh Sinclair, Falkirk, GB;
Peter John Smith, Scotland, GB;
Alan David Bennett, Edinburgh, GB;
Alan Douglas Bryce, Edinburgh, GB;
Sergey Gorobets, Edinburgh, GB;
Alan Welsh Sinclair, Falkirk, GB;
Peter John Smith, Scotland, GB;
SanDisk Corporation, Milpitas, CA (US);
Abstract
A non-volatile memory system is organized in physical groups of physical memory locations. Each physical group (metablock) is erasable as a unit and can be used to store a logical group of data. A memory management system allows for update of a logical group of data by allocating a metablock dedicated to recording the update data of the logical group. The update metablock records update data in the order received and has no restriction on whether the recording is in the correct logical order as originally stored (sequential) or not (chaotic). Eventually the update metablock is closed to further recording. One of several processes will take place, but will ultimately end up with a fully filled metablock in the correct order which replaces the original metablock. In the chaotic case, directory data is maintained in the non-volatile memory in a manner that is conducive to frequent updates. The system supports multiple logical groups being updated concurrently.