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:
Mar. 04, 2014
Filed:
Feb. 11, 2010
Christopher Williams, Devauden/Chepslow Wales, GB;
Gregory Trezise, Wells, GB;
Jonathan Peter Buckingham, Bristol, GB;
Neil Thomas Hutchon, Bristol, GB;
Darren Edward Kent, Bristol, GB;
Andrew Hana, Bristol, GB;
Peter Walsh, Burnham-on-Sea somerset, GB;
Rafel Jibry, Bristol, GB;
Robert Morling, Tockington South Gloucestershire, GB;
Christopher Williams, Devauden/Chepslow Wales, GB;
Gregory Trezise, Wells, GB;
Jonathan Peter Buckingham, Bristol, GB;
Neil Thomas Hutchon, Bristol, GB;
Darren Edward Kent, Bristol, GB;
Andrew Hana, Bristol, GB;
Peter Walsh, Burnham-on-Sea somerset, GB;
Rafel Jibry, Bristol, GB;
Robert Morling, Tockington South Gloucestershire, GB;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Data storage and retrieval methods and apparatus are provided for facilitating data de-duplication for serial-access storage media such as tape. During data storage, input data is divided into a succession of chunks and, for each chunk, a corresponding data item is written to the storage media. The data item comprises the chunk data itself where it is the first occurrence of that data, and otherwise comprises a chunk-data identifier identifying that chunk of subject data. To facilitate reconstruction of the original data on read-back from the storage media a cache () is used together with a database (R), stored on the media, that includes for each duplicated chunk, the location of the corresponding chunk of subject data.