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. 27, 2018
Filed:
Feb. 01, 2012
Arieh Don, Newton, MA (US);
Alexandr Veprinsky, Brookline, MA (US);
Jeremy J. O'hare, Westborough, MA (US);
John T. Fitzgerald, Mansfield, MA (US);
Arieh Don, Newton, MA (US);
Alexandr Veprinsky, Brookline, MA (US);
Jeremy J. O'Hare, Westborough, MA (US);
John T. Fitzgerald, Mansfield, MA (US);
EMC IP HOLDING COMPANY LLC, Hopkinton, MA (US);
Abstract
For a data copying operation, data compression using constant number-of-track-groups and a thinly provisioned target device facilitates incremental updates where the size of the compressed data on the target device changes. Compressed data is written to the same LBA as the beginning of the source device chunk cluster LBA (1:1 mapping of data start). A termination string or other demarking device is used to identify space freed on the target device resulting from compression. During an incremental update only changed chunk clusters are changed, and freed space is changed accordingly if necessary.