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:
Oct. 14, 2014
Filed:
Sep. 28, 2012
Kadir Ozdemir, San Jose, CA (US);
Kadir Ozdemir, San Jose, CA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A computer-implemented method and apparatus manages block mapping. The block mapping maps physical blocks in a block storage device to virtual blocks of a virtual address space. The method involves assigning a generation number from a net of generation numbers to each block mapping entry, where the block mapping entry correlates a physical block with a virtual block. A maximum generation number of the set of generation numbers is increased and a first block mapping entry is marked dirty in response to an update of a correlated first virtual block. A generation number of the first block mapping entry is set to the maximum generation number. Finally, a generation number of a second block mapping entry having a lowest generation number is set to a generation number of the first block mapping entry.