EMC Assigned Two Patents

De-Dupe in Virtualized Storage Environment

EMC Corp., Hopkinton, MA has been assigned a patent (8,209,506) developed by Jedidiah Yueh, Irvine, CA, for a "de-duplication in a virtualized storage environment."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A data de-duplication application de-duplicates redundant data in the pooled storage capacity of a virtualized storage environment. The virtualized storage environment includes a plurality of storage devices and a virtualization or abstraction layer that aggregates all or a portion of the storage capacity of each storage device into a single pool of storage capacity, all or portions of which can be allocated to one or more host systems. For each host system, the virtualization layer presents a representation of at least a portion of the pooled storage capacity wherein the corresponding host system can read and write data. The data de-duplication application identifies redundant data in the pooled storage capacity and replaces it with one or more pointers pointing to a single instance of the data. The de-duplication application can operate on fixed or variable size blocks of data and can de-duplicate data either post-process or in-line."

The patent application was filed on Sept. 28, 2007 (11/864,583).

For Providing WORM storage

EMC Corp. has been assigned a patent (8,200,721) developed by Windsor W. Hsu, San Jose, CA, for a "system and method for providing write-once-read-many (WORM) storage."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Techniques for providing write-once-read-many (WORM) storage are described herein. According to one embodiment, in response to a command to set a time attribute of a file to a first predetermined value, it is determined whether the first predetermined value is outside of an ordinary range of values associated with the time attribute in accordance with a file system associated with the file. The file is designated as a WORM file and a WORM retention period is set for the file based on the first predetermined value, if the first predetermined value is outside of an ordinary range of values associated with the time attribute. The designation of the file as a WORM file and setting the WORM retention period are performed in response to the command."

The patent application was filed on June 28, 2007 (13/155,273).