Marvell Assigned Three Patents

Adaptive physical allocation in solid-state drives

Marvell International Ltd, Hamilton, BM, has been assigned a patent (8,271,720) developed by Gwoyuh Hwu, Cupertino, CA, and Lau Nguyen, Sunnyvale, CA, for "adaptive physical allocation in solid-state drives."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A solid-state drive, a solid-state drive access unit allocation/data storage approach, and a solid-state drive access unit access/data retrieval approach are described that improve the efficiency with which data, that has been stored to the solid-state drive in association with a series of logical block addresses, can be retrieved from the solid-state drive. The described access unit allocation approach assures that data stored in the solid-state drive in association with a sequential series of logical block addresses is stored and maintained in solid-state drive access units, i.e., addressable units of solid-state drive memory, that allow parallel read access to the data via parallel memory access I/O channels internal to the solid-state drive. In this manner, the time required to retrieve data associated with a sequential series of logical block addresses from corresponding access units within the solid-state drive is reduced."

The patent application was filed on Feb. 25, 2010 (12/712,686).

Distributed flash memory storage manager systems

Marvell World Trade Ltd, Saint Michael, BM, has been assigned a patent (8,270,194) developed by Wei Zhou, San Jose, CA, Chee Hoe Chu, San Jose, CA, and Po-Chien Chang, Saratoga, CA, for a "distributed flash memory storage manager systems."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "A flash memory storage system may include several modules of flash memory storage manager circuitry, each having some associated flash memory. The modules may be interconnected via the flash memory storage manager circuitry of the modules. The system may be able to write data to and/or read data from the flash memory associated with various ones of the modules by routing the data through the flash memory storage circuitry of the modules. The system may also be able to relocate data for various reasons using such read and write operations. The flash memory storage circuitry of the modules keeps track of where data actually is in the flash memory."

The patent application was filed on April 5, 2010 (12/754,376).

Systems and methods for sync mark detection using correlation

Marvell International Ltd., Hamilton, BM, has been assigned a patent  (8,279,546) developed by inventors Han, Ke, Fremont, CA, Wu, Zining, Los Altos, CA, Madden Michael, Mountain View, CA, for "systems and methods for sync mark detection using correlation."

The abstract of the patent published by the U.S. Patent and Trademark Office states: "Systems and methods for detecting and designing enhanced disk sync marks using correlation detection are disclosed. The enhanced sync marks provide better noise immunity and higher detection rates over traditional Viterbi-based detection schemes even with a shorter sync mark length. The disk sync mark may provide optimal noise immunity for a particular target polynomial or a plurality of common target polynomials. The minimum Euclidean distance between a candidate sync mark and a plurality of right-shifted versions of the candidate sync mark is computed and compared with other candidate sync marks. The sync mark with the largest minimum Euclidean distance is then selected as the optimal mark. Systems and methods are also disclosed for detecting and designing a disk sync mark using correlation detection when the polarity of the disk is unknown or time-varying."

The patent application was filed on June 14, 2011 (13/160,068)