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    METHOD AND DEVICE FOR DECIDING SYSTEMATIC ERROR VALUE IN TRIGGER PATTERN GENERATION FOR DISK
    2.
    发明专利
    METHOD AND DEVICE FOR DECIDING SYSTEMATIC ERROR VALUE IN TRIGGER PATTERN GENERATION FOR DISK 失效

    公开(公告)号：JP2001243734A

    公开(公告)日：2001-09-07

    申请号：JP2001023388

    申请日：2001-01-31

    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

    Abstract: PROBLEM TO BE SOLVED: To provide an improvement of pattern arrangement when servo information is written by the head of its own by correcting random errors and systematic errors due to the shape influence of the head, generated at a time when trigger patterns are written on a disk. SOLUTION: This method for deciding the value of the systematic error in the case of generating the trigger patterns on a rotating disk, has a step ion which a 1st time interval T146 between 1st and 2nd trigger patterns written by the head positioned at a 1st radial position ST#1 on the disk is measured, a step in which a 2nd time interval T145 between a 3rd trigger pattern written by the head positioned at a 2nd radial position ST#2 on the disk and the 2nd trigger pattern, and a step in which the 1st time interval is compared with the 2nd time interval to decide the value of the systematic error. As a result, it is possible to prevent the propagation of an error of a pattern position.

    SELF-SERVO WRITING METHOD FOR MAINTAINING REFERENCE LEVEL IN DYNAMIC RANGE
    5.
    发明专利
    SELF-SERVO WRITING METHOD FOR MAINTAINING REFERENCE LEVEL IN DYNAMIC RANGE 失效

    公开(公告)号：JPH1050014A

    公开(公告)日：1998-02-20

    申请号：JP12360197

    申请日：1997-05-14

    Applicant: IBM

    Inventor： CHAINER TIMOTHY JOSEPH ,  MAAKU DERORUMAN SUKARUTSU ,  BATSUKUNERU CHIYAPUMAN UEBU ,  EDOWAADO JIYON YARUMUCHIYAKU

    IPC: G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30

    Abstract: PROBLEM TO BE SOLVED: To reduce the necessity of a complicated positioning system by preventing a 1st track from being immediately precedent to a 2nd track at the time of writing a 2nd propagation burst in the 2nd track while control is performed to a 1st propagation burst. SOLUTION: When a min. moving distance exceeds a servo track interval, this is attained by combining a larger forward moving step and a smaller backward moving step of propagation of a head than that shown in the figure. In each step with a dotted line in the figure shows for a self-servo writing process that the head is servo-controlled to the 1st propagation burst and is in a point of writing the 2nd propagation burst. A product servo pattern is shown as a continuous vertical line of data on the left side of the figure. The propagation bursts are shown with labels n, n+1,... in the middle. At the step 1, the propagation burst n is written, whereas the propagation burst n+2 is written by subsequent servo control on outer side edge of the burst (n).

    METHOD FOR DECISION OF ISOLATION BETWEEN READ ELEMENT AND WRITE ELEMENT FOR HEAD AS WELL AS RELATED APPARATUS AND METHOD
    6.
    发明专利
    METHOD FOR DECISION OF ISOLATION BETWEEN READ ELEMENT AND WRITE ELEMENT FOR HEAD AS WELL AS RELATED APPARATUS AND METHOD 失效

    公开(公告)号：JPH08212527A

    公开(公告)日：1996-08-20

    申请号：JP30777795

    申请日：1995-11-27

    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

    Abstract: PROBLEM TO BE SOLVED: To minimize the influence of a speed jitter without reducing the interval by calculating the isolation of reading and writing elements based on the difference of first and second delay times and the rotating speed of a disk. SOLUTION: The system of a self-servo writing unit has an electronic block including a radial propagation controller 2, a timing propagating controller 4 and a pattern generator 6. The method for deciding the isolation between reading and writing elements of a head in this unit is decided by the following steps. The first step positions the head in the first radius of a disk to decide the first reading and writing time delay. The second step positions the head in the second radius of the disk to decide the second reading and writing element delay. Further, the third step calculates the isolation of the reading and writing elements based on the difference of the first and second delays and rotating speed of the disk. Thus, suitable positioning is conducted.

    System for cooling an electronics rack comprising a fluidly connected air-to-liquid heat exchanger and at least one cooling plate
    7.
    发明专利
    System for cooling an electronics rack comprising a fluidly connected air-to-liquid heat exchanger and at least one cooling plate 未知

    公开(公告)号：GB2496020A

    公开(公告)日：2013-05-01

    申请号：GB201216684

    申请日：2012-09-19

    Applicant: IBM

    Inventor： SCHMIDT ROGER ,  LYENGAR MADHUSUDAN ,  GRAYBILL DAVID ,  COICO PATRICK ANTHONY ,  KAMATH VINOD ,  STEINKE MARK EDWARD ,  KOCHUPARAMBIL JOSE BEJOY ,  CHAINER TIMOTHY JOSEPH

    IPC: H05K7/20

    Abstract: A cooling apparatus for an electronics rack includes an air-to-liquid heat exchanger 530, one or more coolant-cooled structures 520 and a tube; the heat exchanger 530, is disposed to cool air passing through the rack, includes a plurality of distinct, coolant-carrying tube sections, each tube section having a coolant inlet and a coolant outlet, one of which is coupled in fluid communication with a coolant loop to facilitate flow of coolant through the tube section; the coolant-cooled structure(s) 520 are in thermal contact with an electronic component(s) of the rack, and facilitates transfer of heat from the component(s) to the coolant; the tube connects in fluid communication one coolant-cooled structure 520 and the other of the coolant inlet or outlet of the one tube section, and facilitates flow of coolant directly between that coolant-carrying tube section of the heat exchanger 530 and the coolant-cooled structure 520. Also disclosed is a method of fabricating the above cooling apparatus and a cooled electronic system comprising the above cooling apparatus and an electronics rack. The cooling apparatus may also comprise an airflow director 512 configured to redirect airflow exhausting from the electronics rack at the outlet side through an airflow return pathway 531 to the inlet side of the rack, where the heat exchanger 530 may be provided in the airflow return pathway 531.

    9.
    发明专利
    未知

    公开(公告)号：DE69525323D1

    公开(公告)日：2002-03-21

    申请号：DE69525323

    申请日：1995-11-03

    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 ,  G11B21/08

    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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