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    RADIAL SELF-PROPAGATION PATTERN GENERATION FOR DISK FILE SERVOWRITING
    23.
    发明专利
    RADIAL SELF-PROPAGATION PATTERN GENERATION FOR DISK FILE SERVOWRITING 未知

    公开(公告)号：CA2366415A1

    公开(公告)日：1996-06-03

    申请号：CA2366415

    申请日：1995-11-24

    Applicant: IBM

    Inventor： YARMCHUK EDWARD JOHN ,  WEBB BUCKNELL C ,  SCHULTZ MARK DELORMAN ,  CHAINER TIMOTHY JOSEPH

    IPC: G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B21/10

    Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.

    RADIAL SELF-PROPAGATION PATTERN GENERATION FOR DISK FILE SERVOWRITING
    24.
    发明专利
    RADIAL SELF-PROPAGATION PATTERN GENERATION FOR DISK FILE SERVOWRITING 未知

    公开(公告)号：CA2365155A1

    公开(公告)日：1996-06-03

    申请号：CA2365155

    申请日：1995-11-24

    Applicant: IBM

    Inventor： SCHULTZ MARK DELORMAN ,  CHAINER TIMOTHY JOSEPH ,  YARMCHUK EDWARD JOHN ,  WEBB BUCKNELL C

    IPC: G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B21/10

    Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.

    SELF-SERVOWRITING TIMING PATTERN GENERATION
    25.
    发明专利
    SELF-SERVOWRITING TIMING PATTERN GENERATION 未知

    公开(公告)号：CA2163053A1

    公开(公告)日：1996-06-02

    申请号：CA2163053

    申请日：1995-11-16

    Applicant: IBM

    Inventor： CHAINER TIMOTHY JOSEPH ,  PRAINO ANTHONY PAUL ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

    IPC: G11B5/55 ,  G11B5/596 ,  G11B19/04 ,  G11B21/10 ,  G11B5/455 ,  G11B5/02

    Abstract: Improvements in placement of timing patterns in self servo writing include c orrecting for random and systematic errors due to geometric effects. In a disk drive h aving a recording head with separate read and write elements, a method for determini ng separation between the elements and for correcting for such errors as a func tion of skew angle between the head and the disk. Errors resulting from misalignment andnon-parallelism of the elements as well as misalignm ent of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocit y of the disk and misplacement of timing patterns with respect to adjacent timing patterns aredetected and corrected. In general, a single revolut ion process may be used to both write and detect random errors on each track and corrected on subsequent tra cks.

    27.
    发明专利
    未知

    公开(公告)号：DE69612778D1

    公开(公告)日：2001-06-21

    申请号：DE69612778

    申请日：1996-02-13

    Applicant: IBM

    Inventor： CHAINER TIMOTHY JOSEPH ,  HERMAN JR ,  KRONGELB SOL ,  ROMANKIW LUBOMYR TARAS ,  YARMCHUK EDWARD JOHN

    IPC: G11B19/20 ,  G11B25/04 ,  G11B33/12 ,  H02K21/24

    Abstract: An integrated data storage disk and disk drive assembly includes a rotatably supported magnetic disk for storing data. A rotor is fixedly joined to the disk for rotating the disk, and includes a plurality of rotor poles. A stator includes a plurality of stator poles positioned around the rotor for sequentially cooperating with respective ones of the rotor poles for rotating the rotor to rotate the disk. The disk and drive may be fabricated using lithographic and electroplating techniques, and a plurality of coaxial disks may be driven by a single disk drive in exemplary embodiments.

    Improvements in self-servo writing timing pattern generation
    29.
    发明专利
    Improvements in self-servo writing timing pattern generation 未知

    公开(公告)号：SG67406A1

    公开(公告)日：1999-09-21

    申请号：SG1997002591

    申请日：1995-11-10

    Applicant: IBM

    Inventor： CHAINER TIMOTHY JOSEPH ,  PRAINO ANTHONY PAUL ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

    IPC: G11B5/55 ,  G11B5/596 ,  G11B19/04 ,  G11B21/10 ,  G11B5/09

    Abstract: Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.

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