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公开(公告)号：JPH07326142A
公开(公告)日：1995-12-12
申请号：JP9926995
申请日：1995-04-25
Applicant: IBM
Inventor： BEST JOHN STEWART , CHIANG WEN-WEI , HETZLER STEVEN ROBERT , HORNE DONALD EDWARD , LEE CHIH-KUNG , MARRELLO VINCENT
Abstract: PURPOSE: To obtain a non-invasion type servo write system for use in a data recording disk drive. CONSTITUTION: The system measures a position of an actuator and generates a reference clock with use of a semiconductor laser 200. An internal position reference is given by an arm of the actuator and by a reflection diffraction grading mounted on a spindle hub. A wave front reproducing optical system corrects an aberration in the grating. An optical sensor detects a differential change in a diffracted pattern generated by the grating and excludes a sensitivity to frequency drift. A decoder circuit converts data of the optical sensor to an actuator position measured value. A control circuit drives a voice coil motor 118 within the disk drive and a motor positions a write transducer to record servo information to be provided within a servo pattern generator. A servo write device writes the data into the fully-assembled, closed drive through a transmission window in a cover of a head disk assembly.
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公开(公告)号：JP2001043643A
公开(公告)日：2001-02-16
申请号：JP2000190872
申请日：2000-06-26
Applicant: IBM
Inventor： BEST JOHN STEWART , CHIANG WEN-WEI , HETZLER STEVEN ROBERT , HORNE DONALD EDWARD , LEE CHIH-KUNG , MARRELLO VINCENT
Abstract: PROBLEM TO BE SOLVED: To provide a non-entrance type servo writing system which is to be used in a data recording disk drive. SOLUTION: A system measures the position of an actuator and generates a reference clock by using a semiconductor laser 200. The reference of the internal position is provided by reflection diffraction gratings mounted on an actuator arm and a spindle hub. A wave front reproducing optical system corrects aberration in the gratings. Moreover, optical sensors detect change of difference of a diffraction pattern to be generated by the gratings to exclude sensitivity with respect to a frequency drift. A decoding circuit converts data of the optical sensors into the measurement value of the position of the actuator. A control circuit drives a voice coil motor 118 in the disk drive and the motor positions a write-in transducer in order to record servo information to be provided in a servo pattern generator. Then, a servo writing device performs a writing to the drive which is completely assembled and is hermetically sealed through a transmission window in a head and disk assembly cover.
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公开(公告)号：DE112021003270B4
公开(公告)日：2024-11-28
申请号：DE112021003270
申请日：2021-07-06
Applicant: IBM
Inventor： HETZLER STEVEN ROBERT , HINEMAN WAYNE , BEST JOHN STEWART
IPC: G06F16/174 , G06F21/62 , H04L9/28 , H04L67/1097
Abstract: Durch einen Computer ausgeführtes Verfahren, das umfasst:Senden (1102) von Schlüsselgruppeninformationen an ein Speichersystem (338), wobei die Schlüsselgruppeninformationen keylD-Informationen für Clientdatenschlüssel (306, 308, 310) in der Schlüsselgruppe umfassen, wobei die Clientdatenschlüssel (306, 308, 310) eine Deduplizierung von Datenblöcken ermöglichen, die in beliebigen der Clientdatenschlüssel (306, 308, 310) in der Schlüsselgruppe verschlüsselt sind;Erzeugen (1104) von Deduplizierungsinformationen, wobei die Deduplizierungsinformationen Fingerabdrücke umfassen, die Blöcken von Clientdaten zugeordnet sind;Verschlüsseln (1106) der Datenblöcke mit einem der Clientdatenschlüssel (306, 308, 310), wobei dem Speichersystem (338) kein entsprechender Entschlüsselungsschlüssel für die verschlüsselten Datenblöcke zur Verfügung steht;Senden (1108) der Deduplizierungsinformationen an das Speichersystem (338) zur Verwendung in einem Deduplizierungsprozess durch das Speichersystem (338); undSenden (1110) der verschlüsselten Datenblöcke an das Speichersystem (338).
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公开(公告)号：DE69505524T2
公开(公告)日：1999-06-02
申请号：DE69505524
申请日：1995-05-18
Applicant: IBM
Inventor： BEST JOHN STEWART , CHIANG WEN-WEI , HETZLER STEVEN ROBERT , HORNE DONALD EDWARD , LEE CHIH-KUNG , MARRELLO VINCENT
Abstract: A non-invasive servo-write system for use in a data recording disk drive. The system measures actuator position and generates a reference clock using semiconductor lasers. Internal position references are provided by reflective diffraction gratings affixed to the actuator arm and the spindle hub. Wavefront reconstruction optics correct for aberrations in the gratings. Optical sensors detect differential changes in the diffraction patterns created by the gratings, eliminating sensitivity to frequency drift. Decode electronics convert optical sensor data into an actuator position measurement. Control electronics drive the voice coil motor within the disk drive, which positions the write transducer to record servo information provided in a servo pattern generator. Transparent windows in the head-disk-assembly cover allow the servo-writer to write drives which are completely assembled and sealed.
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公开(公告)号：AT172571T
公开(公告)日：1998-11-15
申请号：AT95920835
申请日：1995-05-18
Applicant: IBM
Inventor： BEST JOHN STEWART , CHIANG WEN-WEI , HETZLER STEVEN ROBERT , HORNE DONALD EDWARD , LEE CHIH-KUNG , MARRELLO VINCENT
Abstract: A non-invasive servo-write system for use in a data recording disk drive. The system measures actuator position and generates a reference clock using semiconductor lasers. Internal position references are provided by reflective diffraction gratings affixed to the actuator arm and the spindle hub. Wavefront reconstruction optics correct for aberrations in the gratings. Optical sensors detect differential changes in the diffraction patterns created by the gratings, eliminating sensitivity to frequency drift. Decode electronics convert optical sensor data into an actuator position measurement. Control electronics drive the voice coil motor within the disk drive, which positions the write transducer to record servo information provided in a servo pattern generator. Transparent windows in the head-disk-assembly cover allow the servo-writer to write drives which are completely assembled and sealed.
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Patent Agency Ranking
公开(公告)号：DE69108418T2
公开(公告)日：1995-10-12
申请号：DE69108418
申请日：1991-01-17
Applicant: IBM
Abstract: A method and means is described for writing data on a recording medium, such as a disk or tape, containing servo samples in such manner that the number of servo samples is increased with a minimal increase in overhead (non-data) regions. The tracks on the medium are divided into a plurality of maxi sections, each of which contains all fields with servo and associated overhead information and also a data field. At least one micro servo section containing only a portion of said information is located within each data field. As each micro servo section passes by an associated recording head, writing and reading of data is temporarily interrupted, but resumed when the micro servo section moves beyond the head, in such manner as to require minimal resynchronisation of said data during reading. Using a phase continuous clock, data is written in both portions of a data field to either side of each micro servo section in one pass of the disk or tape relative to the head. The micro servo sections contain no timing reference address mark and require no data encoder/decoder flush or synchronisation byte to resume reading in the portion of the data field following each micro servo section.
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公开(公告)号：DE69018382D1
公开(公告)日：1995-05-11
申请号：DE69018382
申请日：1990-11-07
Applicant: IBM
Inventor： BEST JOHN STEWART , WANG PO-KANG
Abstract: A method of positioning separate read and write heads in a disk file compensates for misalignment of the heads when reading and writing data on the disk. Two sets of servo information are generated for each track on the disk. These sets are radially displaced with respect to each other by a distance equal to the respective misalignments between the read and write heads at each respective track. One set is generated by the write head. The other set is generated by the write head while the read head is aligned with said one set. Thereafter, to write data on a selected track, the read head is first aligned with said one set of servo information and then data is written on said track with the write head. To read data on a selected track, the read head is aligned to said other set of servo information and then the data is read by said read head.
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公开(公告)号：PE28991A1
公开(公告)日：1991-10-29
申请号：PE18008391
申请日：1991-01-08
Applicant: IBM
Abstract: SE DESCRIBE UN METODO Y UN MEDIO PARA GRABAR INFORMACION EN UN DISCO O CINTA QUE CONTIENEN SERVOMUESTRAS DE MODO QUE EL NUMERO DE ESTAS SE INCREMENTE MINIMAMENTE EN LAS REGIONES DE NO DATOS (OVERHEAD) LAS PISTAS DEL MEDIO DE GRABACION ESTAN DIVIDIDAS EN UNA PLURALIDAD DE SECCIONES Y CADA UNA DE ESTAS CONTIENE LOS CAMPOS DE IDENTIFICACION (ID) Y SERVO, CON INFORMACION DE NO DATOS (OVERHEAD) Y UN CAMPO DE DATOS
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公开(公告)号：DE69229200T2
公开(公告)日：1999-12-09
申请号：DE69229200
申请日：1992-06-25
Applicant: IBM
Inventor： BEST JOHN STEWART , HETZLER STEVEN ROBERT
Abstract: A data recording disk file is provided with a fixed block architecture sector format that eliminates the ID region. The servo region contains sector identification information in the form of a start-of-track indicating mark recorded in a selected sector of each track and a start-of-sector indicating mark recorded in each sector. A full track number identifier is encoded in the position field within the servo region of each sector. A look-up table is built at format time to map bad sectors out of the disk file. The table contains entries for each cluster of contiguous bad sectors, and is searched at runtime to provide conversion of logical sector location identifiers to physical sector location identifiers.
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10.发明专利
公开(公告)号：SG52209A1
公开(公告)日：1998-09-28
申请号：SG1996000322
申请日：1992-06-25
Applicant: IBM
Inventor： HETZLER STEVEN ROBERT , BEST JOHN STEWART
Abstract: A data recording disk file is provided with a fixed block architecture sector format that eliminates the ID region. The servo region contains sector identification information in the form of a start-of-track indicating mark recorded in a selected sector of each track and a start-of-sector indicating mark recorded in each sector. A full track number identifier is encoded in the position field within the servo region of each sector. A look-up table is built at format time to map bad sectors out of the disk file. The table contains entries for each cluster of contiguous bad sectors, and is searched at runtime to provide conversion of logical sector location identifiers to physical sector location identifiers.
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