EMC Assigned Patent

EMC Corporation, Hopkinton, MA, has been assigned a patent (8,910,031), developed by Liu ZhiGang, Westford, MA, Elliott Dale, Northborough, MA, Ives Stephen Richard, West Boylston, MA, Liu Shen, Westborough, MA, and Chanler Andrew, North Grafton, MA, for a “DIF-CRC based fast hashing ”.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A block CRC based fast data hash provides efficient data integrity verification functions. A hash word is generated from block CRCs that are stored along with data blocks in a hard drive for each data and/or parity track of a storage system, such as a RAID array. Each storage system member writes the hash word into a global memory. Thereafter, a director verifies data integrity using all member’s hash words with one or more XOR operations. Use of the hash words for data integrity verification saves system bandwidth and CPU processing resources.“

The patent application was filed on March 29, 2011 (13/065,748).