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公开(公告)号:HU0201447A2
公开(公告)日:2002-08-28
申请号:HU0201447
申请日:2000-05-18
Applicant: IBM
Inventor: BUI NHAN XUAN , JAQUETTE GLEN ALAN , KOSKI JOHN ALEXANDER , TSURUTA KAZUHIRO
Abstract: A system and method for precisely registering and synchronizing data sets on a recording media having a prerecorded servo pattern. The recording media is subject to continuing movement for reading and/or writing the data sets, interrupted by stopping at the end of a selected data set and restarting. During the continuing movement of the recording media, a detector coupled to the servo system continuously reads linear position registration data modulated into the prerecorded servo pattern. An interpolator interpolates the prerecorded registration data to provide precision registration information for the data sets. Upon the drive stopping the recording media, then back hitching the media and the movement restarting, selected read and interpolated registration information is provided. The detector again reads and interpolates the prerecorded registration data, and a comparator compares the again read and interpolated registration information to the provided read and interpolated registration information and any predetermined offset, and indicates a comparison match. A data formatter coupled to the comparator, responsive to the comparison match indication, synchronizes the reading and/or writing of data sets on the recording media.
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公开(公告)号:JP2009086838A
公开(公告)日:2009-04-23
申请号:JP2007253430
申请日:2007-09-28
Applicant: Internatl Business Mach Corp
, インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Inventor: FUJIWARA SHINOBU , INAGAKI TAKESHI , MIMA SHINSUKE , TSURUTA KAZUHIRO , WATANABE TERUE
CPC classification number: G06F3/0635 , G06F3/0625 , G06F3/0649 , G06F3/067 , G06F3/0685 , Y02D10/154
Abstract: PROBLEM TO BE SOLVED: To determine a storage area, among multiple storage areas, which meets a predetermined requirement to be a target for access. SOLUTION: In a controller 20 for controlling a multi-hierarchical storage subsystem, the following components operate under the control of a file write unit 21 and a file read unit 22. First, a list acquiring unit 23 acquires a list of tiers that can meet file access requirements. A requisite energy calculating unit 24 calculates an additional energy amount necessary to satisfy file access requirements for each tier, and an allowable energy calculating unit 25 calculates an additional energy amount allowable for access, and a path acquiring unit 26 acquires a path to a tier to be accessed based on the energy amounts. An identifier acquiring unit 27 acquires a file identifier, and an access point generating unit 28 generates a file access point based on the path and the file identifier. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题:确定满足作为访问目标的预定要求的多个存储区域中的存储区域。 解决方案:在用于控制多层次存储子系统的控制器20中,以下组件在文件写入单元21和文件读取单元22的控制下操作。首先,列表获取单元23获取层级列表 这可以满足文件访问要求。 所需能量计算单元24计算满足每层的文件访问要求所需的附加能量,并且容许能量计算单元25计算允许访问的附加能量,路径获取单元26获取到 基于能量量进行访问。 标识符获取单元27获取文件标识符,并且接入点生成单元28基于路径和文件标识符生成文件接入点。 版权所有(C)2009,JPO&INPIT
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公开(公告)号:JP2002015532A
公开(公告)日:2002-01-18
申请号:JP2001170742
申请日:2001-06-06
Applicant: IBM
Inventor: NAAN KUSAN BUI , KOSKI JOHN ALEXANDER , SASAKI AKIMITSU , TSURUTA KAZUHIRO
Abstract: PROBLEM TO BE SOLVED: To remove a relative position sensor, while enabling tracking of a micromotion actuator by a coarse motion actuator. SOLUTION: The servo system and the method position a head in the lateral direction to a prescribed servo track, by using the micromotion actuator and the coarse motion actuator. A servo control integrates a position error between the head and a desired position according to a prescribed function, operates the coarse motion actuator to move the micromotion actuator and the head in translational motion according to position errors integrated. The position error is determined by combining a position error signal loop with a servo sensor, the micromotion actuator is operate, so that the position error is reduced, and then the translational motion of the head is performed. The position error signal loop has a compensator function, having an integration function and other functions. The coarse motion servo control is combined with the compensator function and includes connection which provides the integration control indicating the integration function of the position error signal loop, and a driver which is combined with the connection and operates the coarse motion actuator to move micromotion actuator and the head in translational motion in accordance with an integrated signal.
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公开(公告)号:JP2001067847A
公开(公告)日:2001-03-16
申请号:JP2000215615
申请日:2000-07-17
Applicant: IBM
Inventor: BUI NHAN XUAN , FUKUDA JUNICHI , JAQUETTE GLEN ALAN , KOSKI JOHN ALEXANDER , TSURUTA KAZUHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain a data detection method and a data detection apparatus for performing robust detection of data modulated into a servo pattern of a timing base. SOLUTION: First, a timing interval between sequential change stripes is detected, and then, an interval comparison logic circuit 112 determines whether '0' or '1' is represented. Thereafter, a first counter 106 increments the number of the compared intervals that represent '0', while a second counter 107 increments the number of the compared intervals that represent '1'. Then, a bit comparison logic circuit 123 compares the incremented number with a predefined reference value 122 for every frame. When either one is fitted to the reference value 122, the corresponding '0' or '1' is identified as a bit value for the frame.
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公开(公告)号:DE112010003918B4
公开(公告)日:2012-12-13
申请号:DE112010003918
申请日:2010-11-01
Applicant: IBM
Inventor: BUI NHAN XUAN , JUDD KEVIN BRUCE , HANCOCK REED ALAN , TSURUTA KAZUHIRO
IPC: G11B5/584
Abstract: Ein Verfahren, ein Servosystem und ein Bandlaufwerk zum Erreichen eines Einrastens auf ein Servosignal werden bereitgestellt. Die Servosignale mindestens eines Servoelements werden überwacht, um ein gültiges Servosignal zu erkennen. Wird kein gültiges Servosignal erkannt, wird der Fein-Aktor in eine erste Richtung bewegt, bis entweder ein gültiges Servosignal erkannt wird oder die Grenze des Verfahrweges des Fein-Aktors erreicht wird. Wird ein gültiges Servosignal erkannt, wird der Fein-Aktor auf die Nulllage gesetzt und der Grob-Aktor in die erste Richtung bewegt. Wird die Grenze des Verfahrweges des Fein-Aktors erreicht, wird der Fein-Aktor zur ersten Position bewegt und der Grob-Aktor in eine zweite, der ersten Richtung entgegengesetzte Richtung bewegt.
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公开(公告)号:DE10123069B4
公开(公告)日:2012-11-22
申请号:DE10123069
申请日:2001-05-11
Applicant: IBM
Inventor: BUI NHAN XUAN , KOSKI JOHN ALEXANDER , SASAKI AKIMITSU , TSURUTA KAZUHIRO
Abstract: Verfahren zum Ansprechen eines Grobstellgliedes (182) eines Servosystems (170) zum seitlichen Positionieren einer Kopfeinheit, wobei das Servosystem (170) umfasst: – einen Servosensor (171) zum Erkennen der seitlichen Position der Kopfeinheit in Bezug auf definierte Servospuren, – ein Feinstellglied (180) zum seitlichen Verschieben der Kopfeinheit im Verhältnis zu den definierten Servospuren und – das Grobstellglied (182) zum seitlichen Verschieben des Feinstellgliedes (180) im Verhältnis zu den definierten Servospuren; gekennzeichnet durch folgende Schritte: – Erkennen des Positionierungsfehlers zwischen der Kopfeinheit und einer Wunschposition in Bezug auf die definierten Servospuren; – Integration des festgestellten Positionierungsfehlers entsprechend einer vorbestimmten Funktion; – Erzeugen eines Integrations-Steuersignals für das Grobstellglied (182) auf der Basis des integrierten Positionierungsfehlers; und – Ansprechen des Grobstellgliedes (182) mit dem Integrations-Steuersignal, so dass das Feinstellglied (180) und die Kopfeinheit entsprechend dem integrierten Positionierungsfehler verschoben werden.
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公开(公告)号:DE112011100150T5
公开(公告)日:2012-10-25
申请号:DE112011100150
申请日:2011-02-18
Applicant: IBM
Inventor: HANCOCK REED ALAN , INCH RANDY CLARK , JUDD KEVIN BRUCE , TSURUTA KAZUHIRO
IPC: G11B5/584
Abstract: Wenn ein Band seitlichen Verschiebungsauslenkungen von einer Seite eines Kopfes zur anderen unterworfen ist, wird ein Grobaktor seitlich positioniert, um es einem Feinaktor zu ermöglichen, der seitlichen Bewegung eines längslaufenden Bandes mit mindestens einer festgelegten Servospur zu folgen. Eine Positionsfehlersignalschleife ist so eingerichtet, dass sie einen oder mehrere Servosensoren erfassen kann und einen Positionsfehler zwischen dem Kopf und einer gewünschten Position bezüglich der festgelegten Servospur(en) bestimmen kann. Eine Servosteuerung erfasst die seitliche Verschiebungsauslenkung der festgelegten Servospur(en); bestimmt einen maximalen positiven Höchstwert und einen maximalen negativen Höchstwert der seitlichen Verschiebungsauslenkung; und positioniert den Grobaktor im Wesentlichen an einem Mittelpunkt des maximalen positiven Höchstwertes und des maximalen negativen Höchstwertes der seitliche Verschiebungsauslenkung der festgelegten Servospur(en). Somit folgt der Feinaktor der seitlichen Verschiebungsauslenkung, während der Grobaktor im Mittelpunkt verbleibt.
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公开(公告)号:GB2488251A
公开(公告)日:2012-08-22
申请号:GB201203945
申请日:2010-11-01
Applicant: IBM
Inventor: HANCOCK REED ALAN , BUI NHAN XUAN , TSURUTA KAZUHIRO , JUDD KEVIN BRUCE
IPC: G11B5/584
Abstract: A method, a servo system and a tape drive are provided to acquire lock on a servo signal. The servo signals of at least one servo element are monitored to detect a valid servo signal. If a valid servo signal is not detected than the fine actuator is moved in a first direction until either a valid servo signal is detected or the fine actuator travel limit is reached. When a valid servo signal is detected, the fine actuator is set to a neutral position and the coarse actuator is moved in the first direction. When the fine actuator travel limit is reached the fine actuator is moved to the first position and the coarse actuator is moved in a second direction, opposite of the first direction.
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公开(公告)号:DE10123069A8
公开(公告)日:2007-05-31
申请号:DE10123069
申请日:2001-05-11
Applicant: IBM
Inventor: BUI NHAN XUAN , KOSKI JOHN ALEXANDER , SASAKI AKIMITSU , TSURUTA KAZUHIRO
Abstract: A servo system and method position a head laterally with respect to defined servo tracks, employing fine and coarse actuators. A servo control integrates the position error between the head and a desired position in accordance with a predetermined function, and operates the coarse actuator to translate the fine actuator and the head in accordance with the integrated position error. A position error signal loop is coupled to a servo sensor for determining position error for operating the fine actuator to translate the head in a manner to reduce the position error. The position error signal loop may have a compensator function with both integration and other functions. A coarse servo control comprises a connection coupled to the compensator function for providing an integration control representing the integration function of the position error signal loop; and a driver coupled to the connection, operating the coarse actuator to translate the fine actuator and the head in accordance with the integration signal.
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公开(公告)号:CA2413132C
公开(公告)日:2006-09-19
申请号:CA2413132
申请日:2001-07-06
Applicant: IBM
Inventor: KOSKI JOHN ALEXANDER , BUI NHAN XUAN , TSURUTA KAZUHIRO , SASAKI AKIMITSU
Abstract: A method and position control for a servo system for positioning a head laterally with respect to defined servo tracks. The servo system comprises a servo sensor and detector (115) for sensing lateral position of the head (15) and a compound actuator (14) having a fine actuator portion (20) and a coarse actuator portion (16). The position control (116) provides position indications for the coarse actuator portion (16), which may comprise a table relating predetermined nominal lateral position indications to the defined servo tracks. The position control (116) positions the coarse actuator portion (16) at an estimated position with respect to the defined servo tracks, and responds to the servo sensor to determine which servo track is closest to the estimated position. The position control (116) sets the coarse actuator portion (16) position indication to the predetermined nominal lateral position indication of the closest defined servo track, e.g., by looking it up in the table. This thereby corrects the indication of the position of the coarse actuator portion (16).
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