公开(公告)号：CZ9400978A3

公开(公告)日：1995-11-15

申请号：CZ97894

申请日：1992-09-16

Applicant: IBM ,  IBM DEUTSCHLAND

Inventor： CUNNINGHAM EARL ALBERT ,  HARWOOD RICHARD FRED

IPC: G11B5/60 ,  G11B21/21 ,  G11B17/32

CPC classification number: G11B5/6005 ,  G11B21/21

公开(公告)号：CZ97894A3

公开(公告)日：1995-11-15

申请号：CZ97894

申请日：1992-09-16

Applicant: IBM ,  IBM DEUTSCHLAND

Inventor： CUNNINGHAM EARL ALBERT ,  HARWOOD RICHARD FRED

IPC: G11B5/60 ,  G11B21/21 ,  G11B17/32

Abstract: The leading (47) and trailing (48) edges are relative to the motion of the medium. The longitudinal axis is disposed along the length of the support structure and is at a skew angle ranging from zero to positive and negative valves, wrt the direction of motion. A pair of side rails is disposed along the side edges facing the recording medium. The side rails are non-identical and non-symmetrical about the axis for providing air pressurisation about the axis for providing air pressurisation when the skew angle varies over its range. The slider thus flies at a close, uniform spacing from the moving recording medium.

公开(公告)号：CZ286903B6

公开(公告)日：2000-08-16

申请号：CZ97894

申请日：1992-09-16

Applicant: IBM ,  IBM DEUTSCHLAND

Inventor： CUNNINGHAM EARL ALBERT ,  HARWOOD RICHARD FRED

IPC: G11B5/60 ,  G11B21/21 ,  G11B17/32

Abstract: The leading (47) and trailing (48) edges are relative to the motion of the medium. The longitudinal axis is disposed along the length of the support structure and is at a skew angle ranging from zero to positive and negative valves, wrt the direction of motion. A pair of side rails is disposed along the side edges facing the recording medium. The side rails are non-identical and non-symmetrical about the axis for providing air pressurisation about the axis for providing air pressurisation when the skew angle varies over its range. The slider thus flies at a close, uniform spacing from the moving recording medium.

公开(公告)号：HU9401225D0

公开(公告)日：1994-08-29

申请号：HU9401225

申请日：1992-09-16

Applicant: IBM ,  IBM DEUTSCHLAND

Inventor： CUNNINGHAM EARL ALBERT ,  HARWOOD RICHARD FRED

IPC: G11B5/60 ,  G11B21/21

Abstract: The leading (47) and trailing (48) edges are relative to the motion of the medium. The longitudinal axis is disposed along the length of the support structure and is at a skew angle ranging from zero to positive and negative valves, wrt the direction of motion. A pair of side rails is disposed along the side edges facing the recording medium. The side rails are non-identical and non-symmetrical about the axis for providing air pressurisation about the axis for providing air pressurisation when the skew angle varies over its range. The slider thus flies at a close, uniform spacing from the moving recording medium.

公开(公告)号：SG44377A1

公开(公告)日：1997-12-19

申请号：SG1996000024

申请日：1994-09-06

Applicant: IBM

Inventor： ABBOUD SAMIR ELIAS ,  APUZZO NICKOLAS CHRISTOPHER ,  BROWN JEFFREY BERNARD ,  CUNNINGHAM EARL ALBERT ,  HANNON DAVID MALCOLM ,  MALLETTE RAYMOND PATRICK ,  TYLER PAUL SHELDON ,  VOSS STEVEN HARRY

IPC: G11B5/00 ,  G11B5/39 ,  G11B5/465 ,  G11B5/48 ,  H01L43/12

Abstract: The magnetic states of MR reproducing heads are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies.

公开(公告)号：CA2071453C

公开(公告)日：1996-07-09

申请号：CA2071453

申请日：1992-06-17

Applicant: IBM

Inventor： CUNNINGHAM EARL ALBERT ,  HARWOOD RICHARD FRED

IPC: G11B5/60 ,  G11B21/21 ,  G11B5/187 ,  F16C32/06

Abstract: Disclosed is a slider with an air bearing surface for flying a magnetic transducer on an air lubrication film over a moving recording medium. The air bearing surface allows the slider to fly at a close and substantially uniform height over the disk surface regardless of the skew angle of the air flow. The slider has a pair of nonidentical, nonsymmetrical rails disposed about the longitudinal axis of the slider, which through the viscous effects of the air flow, provide the air lubrication film when the recording medium is in motion.

公开(公告)号：BR9502549A

公开(公告)日：1996-02-27

申请号：BR9502549

申请日：1995-05-25

Applicant: IBM

Inventor： BOUTAGHOU ZINE-EDDINE ,  CUNNINGHAM EARL ALBERT ,  OTTESEN HAL HJALMAR

IPC: G11B21/12 ,  G11B5/54 ,  G11B21/02 ,  G11B21/22 ,  G11B5/48

Abstract: Disclosed is a disk drive having at least one disk for storing data. The disk drive includes at least one transducer for reading or writing data to or from the disk. The transducer is attached to an actuator which positions the transducer with respect to the disk. The actuator includes a controllable motor which is used to move the actuator and the transducer attached thereto. The disk drive also includes a ramp for off loading the transducer or for parking the transducer off of the surface of the disk. Also disclosed is apparatus and methods for measuring and controlling the movement of the actuator and attached transducer while the transducer is coming from a position off of the ramp and onto the surface of the disk.

公开(公告)号：DE69425096D1

公开(公告)日：2000-08-10

申请号：DE69425096

申请日：1994-07-28

Applicant: IBM

Inventor： CUNNINGHAM EARL ALBERT ,  OTTESEN HAL HJALMAR ,  ERICKSON KEVIN JACK

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

Abstract: Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal (64) is generated at each of a plurality of sectors around a predetermined track on a disk surface. A specific selected track is identified, and both magnitude and phase of the generated reference feedforward correction signal are modified to correct for the arced trajectory caused by the rotary actuator (58) at the specific selected track. Improved actuator servo control is provided by using pseudo sector compensation to interpolate the feedforward correction signal between servo sectors.

公开(公告)号：DE69423400D1

公开(公告)日：2000-04-20

申请号：DE69423400

申请日：1994-06-21

Applicant: IBM

Inventor： CUNNINGHAM EARL ALBERT ,  HANSON BRADLEY E

IPC: G11B5/09 ,  G11B19/04 ,  G11B20/18 ,  G11B27/36 ,  G11B5/012

Abstract: The method is applicable to a disk drive data storage system of the type including at least one disk surface and at least one transducer head for reading and/or writing data to a respective disk surface. A set of data recovery procedures is stored. When a read back error is detected in a read back data signal, a set of predetermined transducer head and disk parameters is identified. One of the stored data recovery procedures is selected responsive to the detected read back error and the identified predetermined transducer head and disk parameters.

公开(公告)号：DE69224701D1

公开(公告)日：1998-04-16

申请号：DE69224701

申请日：1992-10-28

Applicant: IBM

Inventor： ANDERSON CLARK ALAN ,  ANDERSON TODD BARRY ,  CADLONI GERALD LAWRENCE ,  CUNNINGHAM EARL ALBERT ,  HICKEN MICHAEL SCOTT ,  RENO DANIEL DONALD ,  STEPHENSON JOHN JEFFREY

IPC: G11B21/08 ,  G11B5/55 ,  G11B5/596 ,  G11B19/20

Abstract: In a ultra high density, multiple-disk drive, track switches within a cylinder of tracks as well as track switches to tracks on other cylinders both require a movement of the head stack actuator. Track switching latency in such a disk drive is reduced by overlapping pre-movement portions of the track switching process with the data transfer operation of the currently active recording head. In addition, post-movement portions of the track switching process are overlapped with the movement of the heads so that the next selected read/write head may begin a data transfer operation immediately upon arrival at the next track. Further, the pre-movement and post-movement portions of the track-switch process may be overlapped with low displacement movement of the read/write heads relative to the currently active track or the next track.