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:
Aug. 09, 2011
Filed:
Nov. 06, 2007
Ashish Prakash, Morrissville, NC (US);
Robert M. English, Sunnyvale, CA (US);
Eric Hamilton, Durham, NC (US);
Ashish Prakash, Morrissville, NC (US);
Robert M. English, Sunnyvale, CA (US);
Eric Hamilton, Durham, NC (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
A technique uniquely identifies block context signatures in a storage volume hierarchy of a storage system. In particular, the technique assigns unique volume identifiers ('IDs,' e.g., buffer tree or 'bufftree' IDs) to volumes of the storage volume hierarchy, and allows clone volumes to determine that data blocks belong to an appropriate ancestor volume (e.g., and were written by the ancestor volume prior to creation of the clone). In this manner, the novel technique may uniquely identify and accurately determine whether an accessed data block is a correct data block (e.g., alleviating occurrences of data ID aliasing).