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公开(公告)号：JP2003059217A
公开(公告)日：2003-02-28
申请号：JP2002212175
申请日：2002-07-22
Inventor： OTTESEN HAL HJALMAR , SMITH GORDON JAMES
CPC classification number: G11B5/012 , G11B5/59633 , G11B5/59688 , G11B20/1217 , G11B27/3027 , G11B2020/1292 , G11B2020/1298 , G11B2220/20
Abstract: PROBLEM TO BE SOLVED: To provide a recording disk for a disk drive storage device with enhanced servo technology.
SOLUTION: A recording disk has at least two types of servo sector formats including a first type having a track identification field 405 with a track number and a second type having an abbreviated track field 406 to identify the track in the track area smaller than the entire track area on a disk face. Preferably the track field of the first type employing gray code encoding includes gray code bits sufficiently to identify the full track number, the N-th (N is ≥2) servo sector is the track field of the first type and all the servo sectors between them are track fields of the second type. As a result, the disk area required for the track ID can be reduced.
COPYRIGHT: (C)2003,JPOAbstract translation: 要解决的问题：提供一种具有增强的伺服技术的磁盘驱动器存储装置的记录盘。 解决方案：记录盘具有至少两种类型的伺服扇区格式，包括具有轨道号的轨道识别区域405的第一类型和具有缩写轨道场406的第二类型，以识别小于整个轨道区域的轨道 磁盘面上的磁道区域。 优选地，采用灰度编码的第一类型的轨道场包括充分地识别完整轨道号的灰度码位，第N（N => = 2）个伺服扇区是第一类型的轨道场和所有伺服扇区 它们之间是第二种类型的轨道。 结果，可以减少磁道ID所需的磁盘区域。
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公开(公告)号：JP2003091947A
公开(公告)日：2003-03-28
申请号：JP2002212141
申请日：2002-07-22
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , SMITH GORDON JAMES
Abstract: PROBLEM TO BE SOLVED: To provide a disk drive storage device in which servo technology is improved. SOLUTION: The disk drive storage device comprises embedded track identifying fields 410, 411 which identify a track within a range of tracks. The range being less than the full range of tracks on the disk surface. The full identify of a track during a track seek is determined by iteratively assuming a track identity, and estimating acceleration of the transducer based on the assumed track identity, until the track identify is found for which estimated acceleration meets some predetermined threshold.
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公开(公告)号：IN189523B
公开(公告)日：2003-03-22
申请号：IN1533DE1994
申请日：1994-11-28
Applicant: IBM
Inventor： BERG LOWELL JAMES , BOUTAGHOU ZINE EDDINE , LARSON THOMAS SCOTT , MEYER DALLAS W , MOSBRUCKER JAY MICHAEL , NEUBAUER JERRY LEE , OTTESEN HAL HJALMAR
IPC: G08C9/00
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公开(公告)号：DE69620141D1
公开(公告)日：2002-05-02
申请号：DE69620141
申请日：1996-12-02
Applicant: IBM
Inventor： SMITH GORDON J , OTTESEN HAL HJALMAR
Abstract: An apparatus and method for reading an information signal from a magnetic storage medium (24) using a magnetoresistive (MR) element (72), modifying the signal such that a thermal component of the signal representing a thermal response of the MR element (72) is degraded, and altering the modified signal to produce a restored thermal signal substantially representative of the thermal component of the signal read from the storage medium (24). The information signal induced in the MR element (72) is communicated from the MR element (72) to an arm electronics (AE) module (74) having a highpass filtering behavior. The AE module passes content of the information signal other than the thermal component content, thereby degrading the thermal component of the information signal. An inverse filter (76,88), implemented using an infinite impulse response (IIR) filter, receives the highpass filtered signal from the AE module (74) and produces a restored thermal signal substantially representative of the thermal component of the information signal. The inverse filter (76,88) has a response substantially inverse to that of the effective highpass filter of the AE module (74). A signal summing device (90) is coupled to the AE module (74) and the inverse filter (88) for receiving a restored thermal signal from the inverse filter (88) and a composite signal, including thermal and magnetic components, from the AE module (74) and substantially eliminates the thermal component of the composite signal, which otherwise distorts or modulates the composite signal.
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公开(公告)号：DE69606784T2
公开(公告)日：2000-08-31
申请号：DE69606784
申请日：1996-12-13
Applicant: IBM
Inventor： SMITH GORDON J , OTTESEN HAL HJALMAR
IPC: G01N25/72 , G11B5/00 , G11B5/012 , G11B5/455 , G11B5/55 , G11B5/596 , G11B5/82 , G11B13/00 , G11B21/02 , G11B27/24 , G11B33/10 , G11B33/14 , G11B23/42
Abstract: The present invention is a method and apparatus for positioning a magnetoresistive (MR) head relative to a storage medium in a storage device. The storage medium is mounted in the storage device to allow relative movement between the MR head and the storage medium. The storage medium includes servo information provided to induce a thermal response in the MR head. A controller controls the relative movement between the MR head and the storage medium using the thermal response induced in the MR head.
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Patent Agency Ranking6.发明专利
公开(公告)号：CA2287443A1
公开(公告)日：2000-06-02
申请号：CA2287443
申请日：1999-10-26
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , SMITH GORDON JAMES
Abstract: A method and apparatus for identifying and filtering a resonance frequency of a support structure supporting a read/write head in proximity with a data storage medium involves obtaining a particular sample of a position error signal (PES) frequency transform, preferably using Goertzel's algorithm. The velocity of the data storage medium is varied, and the magnitude of a particular PES frequency transform sample is computed at each of the velocities. A resonance frequency of the support structure is calculated using the velocity associated with the particular sample having a maximum magnitude. The effects of one or more resonance frequencies associated with a read/write head suspension may be canceled in a position error signal using one or more programmable filters provided in each servo loop. A processor programs the filters using the calculated resonance frequencies and adjusts to compensate for the additional lag introduced into the respective servo loops by the selected programmable filters. A method and apparatus for identifying one or more resonance frequencies of one or more read/write head support structures according to the principles of the present invention may be implemented in a data storage system and, preferably, implemented in-situ a data storage system without resort to circuitry external to the data storage system.
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公开(公告)号：DE69323169D1
公开(公告)日：1999-03-04
申请号：DE69323169
申请日：1993-11-19
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , FLORYANCE GREGORY GERARD
Abstract: In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.
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公开(公告)号：CA2105354C
公开(公告)日：1996-10-01
申请号：CA2105354
申请日：1993-09-01
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , FLORYANCE GREGORY GERARD
Abstract: In a storage device, such as a magnetic rigid disk drive, data is stored at varying linear densities in the user data storage portions to increase the effective storage capacity of the device as a function of the differences in soft error rate tolerance associated with the various types of data being stored and the ability of non-alphanumeric data to be enhanced by reconstruction or smoothing rather than by an error correction code. A data type signal included with incoming data dictates the recording frequency and a control signal associated with the recorded data block is read when data is addressed to appropriately adjust the clock frequency for reading such addressed stored data.
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公开(公告)号：CA2155889A1
公开(公告)日：1996-06-30
申请号：CA2155889
申请日：1995-08-11
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , SMITH GORDON JAMES , VANLEEUWEN GEORGE WILLARD
Abstract: A method and apparatus for effectuating the reception and local storage of source information signals representative of a media program transmitted from a source information network preferably over a cable television channel on a pay-per-view basis is disclosed. A local intelligent set-top control unit communicates with a remote information network and a local storage device to coordinate the transmission of customer ordered media programs from the information network for storage on the local storage device. The local storage device is preferably a standard video cassette recorder (VCR) providing full VCR control functionality when presentinga stored media program on a television. A digital or optical data storage disk drive system may alternatively be employed to store source information signals downloaded from the remote information network. The intelligent set-top control unit communicates a pay-per-view billing signal to the information network upon playing of a downloaded media program, and provides protection against unauthorized copying. In an alternative configuration, a set-top control card is installed into a host computer system to coordinate the reception and local storage of downloadedmedia programs, and preferably provides a platform for interfacing with other home communication and electronic systems.
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公开(公告)号：BR9503412A
公开(公告)日：1996-05-21
申请号：BR9503412
申请日：1995-07-24
Applicant: IBM
Inventor： OTTESEN HAL HJALMAR , CUNNINGHAM EARL ALBERT , GREENBERG RICHARD , BROWN DANA HENRY , SMITH GORDON JAMES , VANLEEUWEN GEORGE WILLARD
IPC: G06F3/06 , G11B5/012 , G11B5/09 , G11B5/39 , G11B5/55 , G11B5/596 , G11B7/0037 , G11B7/24 , G11B19/20 , G11B19/247 , G11B20/10 , G11B20/12 , G11B21/00 , G11B21/02 , G11B21/04 , G11B21/10 , G11B27/00 , G11B27/10 , H04N5/781 , H04N7/173
Abstract: A disk drive (102) stores multimedia data in long spiral data tracks. The tracks on opposite surfaces of the disk (201) spiral in opposite directions, so that a track on one surface can be read as the actuator (205) sweeps in, and a track on the opposite surface can be read as the actuator sweeps out. Because the actuator only follows spiral tracks without performing long seek operations, the actuator motor (207) can be reduced in size and stresses on actuator bearings and other parts are reduced. Additionally, due to reduced disturbances associated with seeks, it is possible to follow tracks more closely and therefore reduce the width of individual tracks. Further cost reductions are accomplished by spinning the disks at a slower speed and reducing the size of the spin motor (203) accordingly. Finally, data density can be increased simply because multimedia data does not require the same low error rate as conventional data. Preferably, a group of disk drives optimized for multimedia data is used to form a video-on-demand system. Compressed, interleaved portions of a video presentation, such as a motion picture, are stored in blocks on the spiral tracks. The drives read the blocks on one spiral track at a time from beginning to end, placing the data from these blocks in a set of buffers corresponding to different short time intervals. Video signals are output from the buffers. Any short time interval of the presentation can be accessed on demand by switching to the appropriate buffer.
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