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Marvin R Deforest, Matthew Call, Mei Man L Syu: System and method for high performance command processing in solid state drives. Western Digital Technologies, April 16, 2013: US08423722 (123 worldwide citation)

Solid State Drives (SSD) can yield very high performance if it is designed properly. A SSD typically includes both a front end that interfaces with the host and a back end that interfaces with the flash media. Typically SSDs include flash media that is designed with a high degree of parallelism that ...


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Marvin R DeForest, Christopher J Reed: Data storage device comprising host interface state machine blocking on target logical block address. Western Digital Technologies, February 19, 2013: US08380922 (113 worldwide citation)

A data storage device is disclosed wherein a host interface state machine receives an access command from a host, the access command identifying a plurality of logical block addresses (LBAs). A host interface processor generates at least one control structure executed by the host interface state mac ...


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John W Stewart, Darrell W Woelk, Marvin R DeForest: Associative memory system. NCR Corporation, J T Cavender, Albert L Sessler Jr, Elmer Wargo, March 15, 1983: US04376974 (11 worldwide citation)

An associative memory system including a plurality of associative data controllers (ADCs) which operate in parallel upon a mass storage including a storage array for each ADC. A primitive function processor (PFP) couples the ADCs to a control unit which provides user access to the system. Hardware i ...


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Marvin R DeForest: Apparatus and methods for low overhead, highly reliable determination of position of a magnetic storage medium. Iomega Corporation, Woodcock Washburn, December 4, 2001: US06327105 (9 worldwide citation)

A highly reliable, low overhead method for determining a position of a magnetic storage medium that is divided into a plurality of servo sections is provided. The inventive method includes defining a predetermined bit pattern that corresponds to a known position of the magnetic storage medium. A pos ...


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Troy D Larsen, Martin L Culley, Marvin R DeForest: Method and apparatus for detecting and correcting errors in stored information. Iomega Corporation, Stephen C Beuerle, Procopio Cory Hargreaves & Savitch, September 8, 2009: US07587656 (2 worldwide citation)

A device can receive information to be stored in a first part of a first portion of a block, read previously-stored information from a second part, and store the specified information in the first part and simulate storage of the previously-stored information in the second part while generating erro ...


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Marvin R DeForest: Apparatus and methods for low overhead highly reliable determination of rotational position of a magnetic storage medium. Iomega Corporation, Woodcock Washburn, November 20, 2001: US06320712 (1 worldwide citation)

A highly reliable, low overhead method for determining a rotational position of a magnetic storage medium that is divided into a plurality of servo sections is provided. The inventive method includes defining a predetermined bit pattern that corresponds to a known position of the magnetic storage me ...


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Marvin R DeForest, Robert L Horn: Migration of encrypted data for data storage systems. Western Digital Technologies, March 1, 2016: US09274978

Systems and methods for compression, formatting, and migration of data for data storage systems are disclosed. In some embodiments, data repacking can be used in any situation where embedded metadata needs to be accessed, such as during data migration, and where the underlying data is encrypted. In ...


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Danny O Ybarra, Marvin R Deforest, Alan T Meyer: Buffer memory protection unit. Western Digital Technologies, April 5, 2016: US09305142

Embodiments described herein include systems and methods for managing security of a storage subsystem. Certain of these embodiments involve the use of a buffer protection module configured to intelligently police requests for access to the subsystem buffer memory.



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