1
Paul A Swearingen, Stanley H Shepherd: System for self-servowriting a disk drive. Quantum Corporation, David B Harrison, Debra A Chun, September 16, 1997: US05668679 (225 worldwide citation)

A servowriter capable of non-invasively servowriting a magnetic recording disk drive controls the drive's on-board electro-mechanical head-position actuator system and read/write interface to self-servowrite the target drive. A head within the drive is used to write, open loop, a set of spiral track ...


2
Kevin D Fisher: PRML sampled data channel synchronous servo detector. Quantum Corporation, David B Harrison, January 24, 1995: US05384671 (209 worldwide citation)

A synchronous servo data detection subsystem for a PRML sampled data channel of a hard disk drive including a plurality of radially extending servo sectors embedded on a rotating data storage surface. Each servo sector includes a servo synchronization field, a synchronous servo address mark field, a ...


3
Michael G Machado, Ronald R Moon, Thomas A Tacklind, William G Moon, Bruce R Peterson, Clifford M Gold, Daniel E Barnard, James H Do: High capacity submicro-winchester fixed disk drive. Quantum Corporation, David B Harrison, October 19, 1993: US05255136 (168 worldwide citation)

A miniature disk drive achieves storage densities of at least approximately 1700 tracks per inch per storage surface of a storage disk defining a series of radially extensive servo sectors embedded within circumferential zones of data tracks. The sectors are recorded at a constant data transfer rate ...


4
William L Abbott, Hung C Nguyen, Kenneth E Johnson: Disk drive using PRML class IV sampling data detection with digital adaptive equalization. Quantum Corporation, David B Harrison, August 23, 1994: US05341249 (163 worldwide citation)

A class IV partial response, maximum likelihood data channel for a disk drive includes an encoder connected to a data sequencer for converting user data blocks into a predetermined 8/9ths code such as a (0,4,4,) code. A precoder converts the 8/9ths code into class IV code. An analog write driver sup ...


5
Michael R Hatch, Willilam G Moon: Data head load beam for height compacted, low power fixed head and disk assembly. Quantum Corporation, David B Harrison, June 25, 1991: US05027241 (162 worldwide citation)

A data transducer head mounting structure for a height compacted, low power head and disk assembly of a fixed disk data storage subsystem has an elongated load beam including a head arm attachment end region for attachment to an outward end of an acuator head arm; a leaf spring loading region; a fle ...


6
Ronald R Moon, Michael G Machado, Thomas G Cooper, Patrick M Weiher, Curtis H Bruner, Mark E Strysko, Gregg J Uhlendorf, Steven G Campbell, Tuong T Quan, Hoa V Luong: High capacity disk file with embedded sector servo. Quantum Corporation, David B Harrison, May 26, 1987: US04669004 (159 worldwide citation)

A high performance, low cost rotating disk data storage subsystem includes a head and disk assembly. A plurality of sectors in data tracks include a servo portion containing a prerecorded pattern of a plurality of repeating, time staggered, non-phase-coherent bursts, each burst having a predetermine ...


7
Richard J Blackborow, Peter S Hahn, Claude E Camp, Donald C Westwood, Rodica Florea, Eric J Botto, Scott E Richmond, David B Jeppson: Removable and transportable hard disk subsystem. Quantum Corporation, David B Harrison, August 20, 1991: US05041924 (153 worldwide citation)

A removable and transportable hard disk subsystem is provided for use with at least one computer and includes at least one hard disk module. The module contains a shock mounted, thin and compact micro-Winchester head and disk assembly which plugs into a base housing which is installable entirely wit ...


8
Allen G Rumpler, James R Remby, Ming Ho Lau: Tape head with support bars. Quantum Corporation, Morrison & Foerster, August 26, 2003: US06611398 (153 worldwide citation)

A head for a tape drive system has a plurality of transducers formed on a substrate and protected by a cover bar, with a tie bar bonded to the cover bar. The tie bar extends along a tape-facing surface beyond the cover bar, enhancing the structural integrity of the head. Wear bars may be bonded to t ...


9
William G Moon, Chris Dudte, Michael Cornwell, Ronald K Scott, Kevin Daly: Removable disk storage array emulating tape library having backup and archive capability. Quantum Corporation, Morrison & Foerster, October 18, 2005: US06957291 (125 worldwide citation)

A hard disk drive based data archive system emulating a tape archive system includes a hot pluggable multi-drive magazine having a housing for holding a plurality of hard disk drives, each drive connected to receive power and data from the magazine in a controlled fashion, and at least one magazine ...


10
Ronald R Moon, Michael G Machado, Thomas G Cooper, Patrick M Weiher, Curtis H Bruner, Mark E Strysko, Gregg J Uhlendorf, Steven G Campbell, Tuong T Quan, Hoa V Luong: High capacity disk file with embedded sector servo and SCSI interface. Quantum Corporation, David B Harrison, November 8, 1988: US04783705 (118 worldwide citation)

A disk data storage subsystem includes a head and disk assembly. A plurality of sectors in data tracks include a servo portion containing a prerecorded pattern of a plurality of repeating, time staggered, non-phase-coherent bursts, each burst having a predetermined integral fraction radial offset re ...