1
Timothy Chainer, Mark Delorman Schultz, Bucknell Chapman Webb, Edward John Yarmchuk: Radial self-propagation pattern generation for disk file servowriting. International Business Machines Corporation, Randall J Bluestone, Dunzler & Associates, November 5, 2002: US06476989 (85 worldwide citation)

An improved servowriting system and method whereby errors introduced into the written servo information are reduced or eliminated for greater servowriting accuracy. Accuracy is enhanced by one or more of the following improvements: 1) optimizing write current and write frequency to minimize write wi ...


2
Jeffrey J Dobbek, Mantle Man Hon Yu: Dynamic reverse reassign apparatus and method for a data recording disk drive. International Business Machines Corporation, Ingrid M Foerster, Randall J Bluestone, March 7, 2000: US06034831 (73 worldwide citation)

A data recording disk drive is provided with a reassignment architecture that employs both an "in-line" approach for small disk defects and an "off-site" reassignment for multiple-sector defects. As a further aspect of the invention, the defective sites that have been off-site reassigned are periodi ...


3
Brian J Cagno, John C Elliott, Robert A Kubo, Gregg S Lucas: Verifying data integrity of a non-volatile memory system during data caching process. International Business Machines Corporation, Stephen R Tkacs, Stephen J Walder Jr, Randall J Bluestone, October 11, 2011: US08037380 (68 worldwide citation)

To ensure integrity of non-volatile flash, the controller programs the non-volatile memories with background test patterns and verifies the non-volatile memories during power on self test (POST) operation. In conjunction with verifying the non-volatile memories, the controller may routinely run diag ...


4
Neal Bertram Schirle: Secondary actuator system for mode compensation. Hitachi Global Storage Technologies Netherlands, Randall J Bluestone, Ron Feece, September 16, 2003: US06621653 (48 worldwide citation)

A secondary servo actuator system for use in disk drives comprising a controller and two PZT transducers mounted on each suspension load beam in an arm assembly. When a seek operation is initiated the acceleration of the arms generates vibration modes. The PZT transducers on a suspension adjacent to ...


5
Yuji Yokoe: Predictive power saving method and apparatus for a device based on computed amount of power saving and time at which the device should transition from first state to second state. International Business Machines Corporation, Randall J Bluestone, Robert B Martin, Lewis L Nunnelley, April 22, 2003: US06553501 (42 worldwide citation)

A system which reduces power dissipation in a data storage device having a normal operating mode and at least one power saving mode by computing a predicted amount of power that would be saved by the device if the device makes a transition from the normal operating mode to the power saving mode; com ...


6
Daniel James Malone Sr: System and method for providing nonadjacent redundancy synchronization bytes. International Business Machines Corporation, Ingrid M Foerster, Randall J Bluestone, Abdy Raissinia, September 26, 2000: US06124994 (40 worldwide citation)

The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a red ...


7
Paul Hodges: Device level coordination of access operations among multiple raid control units. International Business Machines Corporation, R Bruce Brodie, Randall J Bluestone, April 17, 2001: US06219751 (36 worldwide citation)

A method and apparatus for serializing access to disk arrays shareable among a plurality of RAID control units at a substantial reduction in intercontrol unit communication by (a) defining a lock function over the parity image blocks at each of the disk drives of a shared disk array; and (b) executi ...


8
Bruce McNutt: Method and system for managing a raid storage system with cache. International Business Machines Corporation, Randall J Bluestone Esq, Ohlandt Greeley Ruggiero & Perle, January 22, 2002: US06341331 (34 worldwide citation)

A computer system has a host computer that runs applications that require data objects from a storage system. The storage system has a storage device, such as a disk storage device, and a cache memory. Data objects that are frequently used by the host computer are stored in the cache memory. The dat ...


9
Shanker Singh, Joe Ming Cheng, Brent Cameron Beardsley, Dell Patrick Leabo, Forrest Lee Wade, Michael Thomas Benhase, Marc Ethan Goldfeder: Data caching with a partially compressed cache. International Business Machines Corporation, Randall J Bluestone, Sawyer Law Group, November 27, 2001: US06324621 (33 worldwide citation)

Aspects for caching storage data include partitioning a storage cache to include a compressed data partition and an uncompressed data partition, and adjusting a size of the compressed data partition and the uncompressed data partition for chosen performance characteristics. A data caching system asp ...


10
Brian D Goodman, Frank Lawrence Jania, Darren Mark Shaw: Context enhanced messaging and collaboration system. International Business Machines Corporation, Francis Lammes, Stephen J Walder Jr, Randall J Bluestone, March 10, 2009: US07503007 (32 worldwide citation)

A context enhanced messaging and collaboration system in which resources related to the context of text messages may be automatically identified and exchanged between users in association with the text messages, is provided. A graphical user interface (GUI) is provided for instant messaging between ...