公开(公告)号：WO2014083508A3

公开(公告)日：2014-07-24

申请号：PCT/IB2013060436

申请日：2013-11-27

Applicant: IBM ,  IBM RES GMBH

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

CPC classification number: G11B5/584

Abstract: A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a first servo subband (SB1) extending along the longitudinal extension (x) of the tape storage medium (1) and a second servo subband (SB2) extending along the longitudinal extension (x) of the tape storage medium (TP) next to the first servo subband (SB1). The first servo subband (SB1) comprises a frame servo pattern containing a set of servo frames (FR), wherein each servo frame (FR) of the set comprises a first burst (A) comprising at least two servo stripes (SP1) inclined at a first angle ( α) with respect to a direction orthogonal to the longitudinal extension (x) of the tape medium (TP), followed by a second burst (B) comprising at least two servo stripes (SP2) inclined at a second angle (&bgr;) with respect to the direction orthogonal to the longitudinal extension (x) of the tape medium (TP), which second angle (α) is different from the first angle (&bgr;). The second servo subband (SB2) contains a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other, wherein each servo track (STx) of the set contains a servo pattern of magnetic transitions representing a waveform when being read, and wherein the waveforms of adjacent servo tracks (STx) are orthogonal to each other.

Abstract translation: 磁带存储介质包括沿着磁带存储介质（TP）的纵向延伸（x）的至少一个伺服带（SB），用于支持确定位置信息。 伺服带（SB）包括沿带存储介质（1）的纵向延伸（x）延伸的第一伺服子带（SB1）和沿着带存储器（1）的纵向延伸（x）延伸的第二伺服子带 介质（TP）紧挨着第一伺服子带（SB1）。 第一伺服子带（SB1）包括含有一组伺服帧（FR）的帧伺服模式，其中该组的每个伺服帧（FR）包括第一脉冲串（A），该第一脉冲串包括至少两个伺服条纹（SP1） （TP）的与纵向延伸（x）正交的方向的第一角度（α），接着是包括以第二角度倾斜的至少两个伺服条纹（SP2）的第二脉冲（B）（ （α）与第一角度（β）不同的正交于带式介质（TP）的纵向延伸（x）的方向）。 第二伺服子频带（SB2）包含沿着磁带存储介质（TP）的纵向延伸（x）延伸并且彼此相邻排列的一组伺服磁道（STx），其中该组的每个伺服磁道（STx）包含 当读取时表示波形的磁转变的伺服模式，并且其中相邻伺服轨道（STx）的波形彼此正交。

公开(公告)号：WO2011104050A2

公开(公告)日：2011-09-01

申请号：PCT/EP2011050674

申请日：2011-01-19

Applicant: IBM ,  CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

Inventor： CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

CPC classification number: G11B5/584 ,  G11B5/09

Abstract: Timing based servo bursts of servo frames, in which the frames are arranged to be symmetric with the same number of servo stripes in each burst of a frame, are synchronized by shifting selected bits. For example, servo frames are arranged with four servo bursts with an equal number of servo stripes in each burst, the servo frames comprising two symmetric sub-frames, each sub-frame comprising two bursts of servo stripes that are parallel to each other within a burst, and the bursts are non-parallel with respect to each other; each servo burst is arranged to comprise at least one reference servo stripe; and each servo burst is arranged to comprise at least one shifted servo stripe, wherein the shift is in the same longitudinal direction with respect to at least one reference servo stripe for each burst of a frame and the opposite longitudinal direction for bursts of sequentially adjacent frames.

Abstract translation: 伺服帧的基于时序的伺服脉冲串通过移位所选位来同步，其中帧被布置为在帧的每个突发中具有相同数量的伺服条带对称。 例如，伺服帧被布置成具有在每个突发中具有相等数量的伺服条带的四个伺服脉冲串，伺服帧包括两个对称子帧，每个子帧包括在一个内部的彼此平行的两个脉冲串的伺服条带 突发，并且突发是相互不平行的; 每个伺服脉冲串被布置成包括至少一个参考伺服条纹; 并且每个伺服脉冲串被布置成包括至少一个移位的伺服条带，其中相对于帧的每个脉冲串相对于至少一个参考伺服条带的移位在相同的纵向方向上，并且相反的纵向方向用于顺序相邻帧的突发 。

公开(公告)号：GB2518678A

公开(公告)日：2015-04-01

申请号：GB201317262

申请日：2013-09-30

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/29 ,  G11B5/584

Abstract: A tape storage system simultaneously receives readback signals from a set of data readers DRi reading from data tracks DT1-14 of a set of adjacent data tracks extending along a longitudinal extension x of a tape. Each data track has a width wDT and each data reader has a width wDR that exceeds the width of a data track. In the readback signal of one of the data readers a simultaneous presence of two waveforms is detected stemming from two different servo patterns SP1, SP2 arranged in servo sections of adjacent data tracks. Lateral position, velocity, gain or timing information is derived from a measure of the energy of the two waveforms detected in the readback signal of the one data reader and another of the data readers and is used in the operation of the tape storage system. The servo patterns can have at least two different servo patterns, the servo sections of adjacent data tracks being longitudinally offset and partly overlapping.

公开(公告)号：GB2508387A

公开(公告)日：2014-06-04

申请号：GB201221553

申请日：2012-11-30

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  ROTHUIZEN HUGO E

IPC: G11B5/23 ,  G11B5/584

Abstract: A write head is provided for writing a servo pattern to a magnetic tape storage medium. The write head comprises at least a first write gap A and a second write gap B, the gaps being separately energizable. The second write gap comprises at least a first section a and a second section b. Energization of the second write gap causes a magnetic flux across the first section insufficient for changing a magnetization of a track and the second section 10 is designed such that energization causes a magnetic flux across the second section sufficient for magnetizing a track of the magnetic tape storage medium TP. The gaps may be inclined or perpendicular to a motion direction of the tape. The head may have a third write gap separately energizable to the first and second gaps where the third gap also has first and second sections. A method of writing a servo band comprises moving a servo band across at least first and second write gaps.

公开(公告)号：DE112018005762T5

公开(公告)日：2020-07-23

申请号：DE112018005762

申请日：2018-12-04

Applicant: IBM

Inventor： CIDECIYAN ROY ,  FURRER SIMEON ,  LANTZ MARK ALFRED

IPC: G11B20/18

Abstract: Ein Verfahren umfasst Schreiben eines Datensatzes auf ein Speichermedium mit sequenziellem Zugriff. Das Verfahren umfasst auch Lesen des Datensatzes unmittelbar nach dem Schreiben auf das Speichermedium mit sequenziellem Zugriff in einem Lesen-während-Schreiben-Prozess, um einen oder mehrere fehlerhaft codierte Datenblöcke zu identifizieren, wobei jeder des einen oder der mehreren fehlerhaft codierten Datenblöcke mindestens ein fehlerhaftes Codewort mit Symbolen enthält, die eine Größe von mindestens 10 Bit haben. Darüber hinaus umfasst das Verfahren Neuschreiben eines ersten des einen oder der mehreren fehlerhaft codierten Datenblöcke innerhalb eines ersten codierten Datenblocksatzes auf eine bestimmte logische Spur im Neuschreibbereich des Speichermediums mit sequenziellem Zugriff, die aus einer vorgegebenen Teilmenge logischer Spuren ausgewählt wurde. Die vorgegebene Teilmenge logischer Spuren umfasst D1+D2+1 logische Spuren. Nur ein fehlerhaft codierter Datenblock aus einem bestimmten Teildatensatz wird in einem einzigen codierten Datenblocksatz in dem Neuschreibbereich neu geschrieben.

公开(公告)号：GB2517744A

公开(公告)日：2015-03-04

申请号：GB201315472

申请日：2013-08-30

Applicant: IBM

Inventor： PANTAZI ANGELIKI ,  LANTZ MARK ALFRED ,  TUMA TOMAS

IPC: G11B5/584

Abstract: A control system 1 aligns a first element, such as a read/write head, being coupled to an actuator 12 with a second element, such as a tape, of a main system. The control system comprises a position sensor for measuring an absolute position of the first element relative to the main system as a sensor signal 18, and a position error signal-based compensator 10 for generating a second control signal 25 as a function of a position error signal (PES) 24, relative to the second element. A sensor-based compensator 11 generates a first control signal 15 as a function of the sensor signal and the second control signal, and an actuator changes the position of the first element relative to the second element dependent on the first control signal in order to align the first element with the second element. The first control signal may be dependent on a vibration frequency domain profile indicative of environmental vibrations induced to the main system.

公开(公告)号：GB2517714A

公开(公告)日：2015-03-04

申请号：GB201315325

申请日：2013-08-29

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A tape storage medium TP comprising a servo band SB along a longitudinal extension x of the tape. The servo band comprises a set of servo tracks STx of width wST extending along the longitudinal extension of the tape and arranged next to each other. A total of two different servo patterns PN_A, PN_B are contained in the set of servo tracks and servo patterns of adjacent servo tracks are different from each other. A tape head comprises two servo readers SR1 and SR2 for reading the servo band. A width wSR1, wSR2 of each servo reader orthogonal to the longitudinal extension of the tape is at least half the width of a servo track. The two servo readers are offset oR from each other orthogonal to the longitudinal extension of the tape by d*wST+n*wST with 0

公开(公告)号：GB2503483A

公开(公告)日：2014-01-01

申请号：GB201211473

申请日：2012-06-28

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  LANTZ MARK ALFRED

IPC: G11B5/584 ,  G11B5/265

Abstract: A magnetic tape servo band comprises servo patterns organized in servo frames FR for determining positional information. The servo frames comprise a first burst A comprising at least two servo stripes 111 inclined at a first angle α followed by a second burst B comprising at least two servo stripes inclined at a second angle β with respect to a direction orthogonal to the longitudinal extension of the tape medium. The second angle being different to the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity. A servo write head has first and second ring structures with a gap in each ring structure where the magnetic flux is oriented in opposite direction across the gaps.

公开(公告)号：DE112018002025T5

公开(公告)日：2020-01-09

申请号：DE112018002025

申请日：2018-06-20

Applicant: IBM

Inventor： PANTAZI ANGELIKI ,  CHERUBIN GIOVANNI ,  TAKETOMI TOMOKO ,  BUI NHAN XUAN ,  LANTZ MARK ALFRED

IPC: G11B15/43

Abstract: Ausführungsformen der vorliegenden Erfindung stellen ein Bandtransport-Regelsystem mit verbesserter Regelung von Bandspannung und -geschwindigkeit über die gesamte Länge des Bandes bereit. Das Bandtransport-Regelsystem weist eine Schaltungsanordnung auf, die ausgelegt ist zum Ausgeben eines oder mehrerer Signale, und eine Schaltungsanordnung, die ausgelegt ist zum Empfangen eines oder mehrerer Signale, welche eine Bandgeschwindigkeit, einen Radius der ersten Bandspule und/oder der zweiten Bandspule und eine Bandspannung darstellen, und zum Erzeugen mindestens eines Regelsignals beruhend auf den empfangenen Signalen, um den ersten Spulenmotor und/oder den zweiten Spulenmotor zu regeln, um eine Spannungsstörgröße auf ein Minimum zu verringern, wobei eine Frequenz einer zeitvariablen Spulendrehfrequenz entspricht, und zwar beruhend auf Reglerparametern, die von der Bandgeschwindigkeit und dem Radius der ersten Bandspule und/oder der zweiten Bandspule abhängen.

公开(公告)号：GB2525669A

公开(公告)日：2015-11-04

申请号：GB201407769

申请日：2014-05-02

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A magnetic tape storage medium comprises at least one servo band 11 with at least two subbands 111 and 112 along a longitudinal extension of the tape storage medium. Servo bursts A, A, B, B are written to the sub-bands for determining positional information. A first 111 of the subbands comprises a first burst A comprising at least one servo stripe inclined at a first non-zero angle α with respect to a direction orthogonal to the longitudinal extension of the tape storage medium followed by a second burst B comprising at least one servo stripe inclined at a second non-zero angle β with respect to the direction orthogonal to the longitudinal extension of the tape storage medium, where the second angle β is different from the first angle α. A second 112 of the sub-bands comprises a first burst A comprising at least one servo stripe followed by a second burst B comprising at least one servo stripe, where stripes of the first and the second bursts are parallel to each other.