公开(公告)号：EP2352081A4

公开(公告)日：2012-10-17

申请号：EP09816034

申请日：2009-09-02

Applicant: IBM

Inventor： OISHI YUTAKA ,  TSURUTA KAZUHIRO ,  TAKETOMI TOMOKO ,  IWASAKI NORIE

IPC: G06F3/06 ,  G11B27/00

CPC classification number: G06F3/0611 ,  G06F3/0629 ,  G06F3/0635 ,  G06F3/0659 ,  G06F3/0682 ,  G06F3/0686

公开(公告)号：GB2525222A

公开(公告)日：2015-10-21

申请号：GB201406870

申请日：2014-04-16

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  JELITTO JENS ,  TSURUTA KAZUHIRO ,  FURRER SIMEON

IPC: G11B5/584

Abstract: An apparatus for operating a tape storage device comprises a tape skew estimation unit 4 for estimating a value related to a skew of a tape storage medium arranged in the tape storage device relative to a head module of the tape storage device. A servo pattern decoder 3 is configured to decode information encoded in a servo pattern written to one or more servo bands of the tape storage medium. The decoding is based on read-back signals RB1, RB2 of at least two servo readers of the tape storage device arranged for reading the servo pattern from the one or more servo bands and based on the estimated skew related value. The information can include longitudinal position (LPOS). The skew related value may be in the form of a time offset and the servo pattern decoder may include delay units 311, 312 for delaying a read back signal determined to be ahead in time before combining the read back signals. The read back signals may be weighted by a signal quality index (SDR).

公开(公告)号：DE112011100154T5

公开(公告)日：2012-10-04

申请号：DE112011100154

申请日：2011-02-18

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  HANCOCK REED ALAN ,  JELITTO JENS ,  TSURUTA KAZUHIRO ,  BUI NHAN XUAN

IPC: G11B5/584

Abstract: Ein veränderliches Zeitintervall wird von einem zeitabhängigen Servoband erfasst, um die seitliche Position eines Servolesekopfs zu ermitteln. Das Servoband ist in einer Folge von Blöcken mit nichtparallelen Servostreifen in sequenziell angrenzenden Unterrahmen eines linearen Magnetbands angeordnet. Die Zeitintervalle umfassen mindestens ein erstes Zeitintervall (A) zwischen einem ersten Paar nichtparalleler Servostreifen eines Unterrahmens; und ein veränderliches Zeitintervall (C) zwischen einem Paar nichtparalleler Servostreifen zwischen den ersten Zeitintervallen (A), wobei die Servostreifen des veränderlichen Intervalls der sequenziell angrenzenden Unterrahmen einen zweiten Servostreifen des ersten Paars und einen ersten Servostreifen eines sequenziell nachfolgenden ersten Paars umfassen. Bei Positionssignalen handelt es sich um Verhältnisse, an denen das erste und das zweite Zeitintervall beteiligt sind.

公开(公告)号：JP2006172704A

公开(公告)日：2006-06-29

申请号：JP2005360532

申请日：2005-12-14

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： BUI NHAN ,  INCH RANDY ,  OGURA EIJI ,  TSURUTA KAZUHIRO

IPC: G11B15/467 ,  G11B5/584 ,  G11B15/46 ,  G11B15/68

CPC classification number: G11B5/584 ,  G11B15/688

Abstract: PROBLEM TO BE SOLVED: To provide a compensator for synchronous sampling time-based servo system. SOLUTION: This method operates a tape drive, which has a basic tape speed for moving a magnetic tape along with a tape head, and which generates a first tape head position signal from the tape head at a first sample frequency proportional to the basic tape speed. Further, the method comprises the steps of: processing the first tape head position signal synchronized with the first sample frequency and controlling the tape head position using a control system including a compensator having a maximum phase response in a first cross over frequency; giving an interrupt signal synchronized with the first sample frequency to a processing system; and the processing system giving an output value h (k) which generates the maximum phase response at the first cross over frequency responsive to the processing system receiving the interruption signal. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为同步采样时间伺服系统提供补偿器。 解决方案：该方法操作磁带驱动器，其具有用于与磁带头一起移动磁带的基本磁带速度，并且其以与第一采样频率成比例的磁带头从磁带头生成第一磁头位置信号 基本磁带速度。 此外，该方法包括以下步骤：使用包括在第一交叉频率具有最大相位响应的补偿器的控制系统来处理与第一采样频率同步的第一磁带头位置信号并控制磁头位置; 将与第一采样频率同步的中断信号提供给处理系统; 并且所述处理系统给出响应于所述处理系统接收到所述中断信号而在所述第一交叉频率处产生最大相位响应的输出值h（k）。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006048852A

公开(公告)日：2006-02-16

申请号：JP2004230471

申请日：2004-08-06

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： XUAN BUI NHAN ,  JAMES HOWARD EATON ,  FUKUDA JUNICHI ,  JAQUETTE GLEN ALAN ,  OGURA EIJI ,  ALLAN TAYLOR MARK ,  TSURUTA KAZUHIRO

IPC: G11B5/584 ,  G11B20/10 ,  G11B20/12

Abstract: PROBLEM TO BE SOLVED: To provide selected and different superimpose data information to identify a separated servo band for addressablility in which the separated servo band is independent in a magnetic tape having a vertical direction servo band in which servo information provided with superimpose data information is separated. SOLUTION: Servo information has transition extended in the horizontal direction not parallel to indicate the positioning of a horizontal direction, The selected different superimpose data information can have a lack of a part of the servo band. When the superimpose data information is the position information of a vertical direction, The selected different superimpose data information can have position information in which one or a plurality of servo bands are different. The selected different superimpose data information can have a band identifier in the superimpose data information of one or the plurality of servo bands. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供选择和不同的叠加数据信息以识别在具有垂直方向伺服频带的磁带中分离的伺服频带独立的可分辨的伺服频带，其中提供有叠加数据的伺服信息 信息是分开的。

解决方案：伺服信息在水平方向上的转换不平行，以指示水平方向的定位。所选择的不同叠加数据信息可能缺少伺服带的一部分。 当叠加数据信息是垂直方向的位置信息时，所选择的不同叠加数据信息可以具有其中一个或多个伺服带不同的位置信息。 所选择的不同叠加数据信息可以在一个或多个伺服带的叠加数据信息中具有频带标识符。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2001006140A

公开(公告)日：2001-01-12

申请号：JP2000139485

申请日：2000-05-12

Applicant: IBM

Inventor： BUI NHAN XUAN ,  FUKUDA JUNICHI ,  JAQUETTE GLEN ALAN ,  KOSKI JOHN ALEXANDER ,  TSURUTA KAZUHIRO

IPC: G11B5/008 ,  G11B5/584 ,  G11B20/10 ,  G11B20/12 ,  G11B21/10 ,  G11B27/13

Abstract: PROBLEM TO BE SOLVED: To effectively and precisely identify the serve gap by dividing a detected group timing gap by a specified divisor, feeding a timing interval gap detection threshold, and measuring the timing intervals between detected transition stripes. SOLUTION: A divider 170 divides a detected group B timing interval by a specified divisor to output a divided timing interval gap detection threshold. The divisor is selected by a divisor selector 174 to generate longer thresholds than the timing interval between transition stripes of burst one by one, and this involves values for generating shorter thresholds than the timing intervals of a min. interval gap at the edge of a servo pattern. A servo gap output value of a comparator 110 is fed back to an interval counter 120, and the count is fixed to latch the detection. When a pulse detector 122 detects the next stripe transition, the interval counter is reset to zero again.

公开(公告)号：GB2490219B

公开(公告)日：2014-07-16

申请号：GB201206620

申请日：2011-01-20

Applicant: IBM

Inventor： HANCOCK REED ALAN ,  BUI NHAN XUAN ,  TSURUTA KAZUHIRO ,  JUDD KEVIN BRUCE ,  INCH RANDY CLARK

IPC: G11B5/584

Abstract: A servo detection system for detecting servo tracks of a longitudinal tape. In a read/write head, two servo read heads are spaced laterally on a first head module, and a servo read head is on a second head module spaced longitudinally from the first module. A method comprises initially sensing a tape servo track with one servo read head of the first module and the servo read head of the second module to determine skew misalignment of the servo track. A zero reference value is stored representing the determined skew misalignment. The detection system switches from the one servo read head of each module, to the two servo read heads of the first module, and employs the stored value to position the read/write head in the zero skew position. The two servo read heads are then employed to read two servo tracks to identify the data band and to control skew.

公开(公告)号：DE112011102447T5

公开(公告)日：2013-06-13

申请号：DE112011102447

申请日：2011-07-14

Applicant: IBM

Inventor： HANCOCK REED ALAN ,  INCH RANDY CLARK ,  TSURUTA KAZUHIRO ,  OGURA EIJI ,  NADE-HARA SHUHEI ,  BUI NHAN XUAN

IPC: G11B15/46 ,  G11B15/54

Abstract: Offenbart wird ein Verfahren zum Betrieb eines Magnetbandlaufwerks. Das Bandlaufwerk weist eine Vielzahl von Gleichstrommotoren auf, von denen jeder eine Vielzahl von Hall-Sensoren aufweist und unter der Steuerung eines Servosystems steht, das so konfiguriert ist, dass es Positionsangaben vom Magnetband liest. Das Servosystem berechnet eine primäre Bandgeschwindigkeit aus der Positionsangabe und erfasst ein sekundäres und ein tertiäres Geschwindigkeitssignal und berechnet anhand dieser eine Bandgeschwindigkeit. Wenn die Positionsangabe der primären Geschwindigkeit verfügbar ist, wird sie verwendet, wenn nicht, wird eines von dem sekundären oder tertiären Geschwindigkeitssignal verwendet. Das sekundäre Geschwindigkeitssignal wird verwendet, wenn ein Absolutwert eines auf die Bandgeschwindigkeit bezogenen Terms kleiner als ein vorbestimmter Wert ist, und das tertiäre Geschwindigkeitssignal wird verwendet, wenn ein Absolutwert des auf die Bandgeschwindigkeit bezogenen Terms größer als der vorbestimmte Wert ist.

公开(公告)号：DE60105437T2

公开(公告)日：2005-09-22

申请号：DE60105437

申请日：2001-07-06

Applicant: IBM

Inventor： BUI XUAN ,  KOSKI ALEXANDER ,  SASAKI AKIMITSU ,  TSURUTA KAZUHIRO

IPC: G11B5/584

Abstract: A servo system and method position a head laterally with respect to magnetic tape longitudinal defined servo bands arranged in a longitudinally shifted pattern for identification, and separated by data tracks. A servo controller responds to a loss of lateral position, sensing an estimated longitudinal position of the magnetic tape. If the estimated longitudinal position is within a predetermined distance of an end of the tape, the servo controller operates a drive to continuously move the tape away from the sensed end. The servo controller senses a home lateral position sensor to determine whether a compound actuator is within a predetermined distance of the edge of the magnetic tape. If so, it operates the coarse actuator portion of the compound actuator to move laterally away from the edge of the magnetic tape; else, to move toward the edge. The servo controller senses a dual servo sensor to detect any two of the defined servo bands; and, upon sensing any two of the defined servo bands, detects the longitudinal shift to identify which ones of the two defined servo bands have been detected.

公开(公告)号：DE60004043T2

公开(公告)日：2004-04-15

申请号：DE60004043

申请日：2000-05-18

Applicant: IBM

Inventor： BUI XUAN ,  JAQUETTE ALAN ,  KOSKI ALEXANDER ,  TSURUTA KAZUHIRO

IPC: G11B27/28 ,  G11B27/10 ,  G11B27/32 ,  G11B27/36 ,  G11B15/087

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.