公开(公告)号：EP0321942A2

公开(公告)日：1989-06-28

申请号：EP88121375.5

申请日：1988-12-21

Applicant: KONICA CORPORATION

Inventor： Moraru, Alex ,  Skalon, Peter

IPC: G11B5/596 ,  G11B17/028 ,  G11B21/10

CPC classification number: G11B5/59655

Abstract: A flexible data disk has consecutive servo tracks having a synchronization and alternate synchronization mark. The synchronization and alternate synchroniza­tion marks in each servo sector are radially aligned. Four magnetic pulses represent a synchronization mark and two magnetic pulses represent an alternate synchronization mark. The disk drive system will read and identify the synchronization marks and alternate synchronization marks and start generating timing pulses as appropriate. The servo bursts can then be read allowing the disk drive system to center the transducer head over the data tracks.

Abstract translation: 灵活的数据盘具有连续的伺服轨迹，具有同步和交替的同步标记。 每个伺服扇区中的同步和交替同步标记是径向对齐的。 四个磁脉冲表示同步标记，两个磁脉冲表示交替的同步标记。 磁盘驱动器系统将读取并识别同步标记和备用同步标记，并适当地开始产生定时脉冲。 然后可以读取伺服脉冲串，允许磁盘驱动器系统将换能器头对准数据轨道。

公开(公告)号：EP0265092A3

公开(公告)日：1988-11-30

申请号：EP87308600

申请日：1987-09-29

Applicant: KONICA CORPORATION

Inventor： Song, Hubert

IPC: G11B05/596 ,  G11B21/10

CPC classification number: G11B5/59655

Abstract: A servo system for flexible magnetic disks such that the synchronization pulses do not have to be perfectly aligned. The disk is encoded such that consecutive servo tracks alternate between having a synchronization and an alternate synchronization mark. Four pulses represent a synchronization mark and two pulses represent an alternate synchronization mark. The alternate synchronization marks are off-set from the synchronization marks by a certain distance, such that they do not interfere with each other when a transducer head located between the servo tracks reads them. The disk drive system will read and identify the synchronization marks or alternate synchronization marks and start generating timing signals as appropriate. The servo bursts in the servo sector can then be read.

公开(公告)号：EP0265092A2

公开(公告)日：1988-04-27

申请号：EP87308600.3

申请日：1987-09-29

Applicant: KONICA CORPORATION

Inventor： Song, Hubert

IPC: G11B5/596

CPC classification number: G11B5/59655

Abstract: A servo system for flexible magnetic disks such that the synchronization pulses do not have to be perfectly aligned. The disk is encoded such that consecutive servo tracks alternate between having a synchronization and an alternate synchronization mark. Four pulses represent a synchronization mark and two pulses represent an alternate synchronization mark. The alternate synchronization marks are off-set from the synchronization marks by a certain distance, such that they do not interfere with each other when a transducer head located between the servo tracks reads them. The disk drive system will read and identify the synchronization marks or alternate synchronization marks and start generating timing signals as appropriate. The servo bursts in the servo sector can then be read.

Abstract translation: 用于柔性磁盘的伺服系统，使得同步脉冲不必完全对准。 磁盘被编码使得连续的伺服磁道在具有同步和备用同步标记之间交替。 四个脉冲表示同步标记，两个脉冲表示替代的同步标记。 替代同步标记从同步标记偏移一定距离，使得当位于伺服磁道之间的换能器头读取它们时，它们不会相互干扰。 磁盘驱动器系统将读取并识别同步标记或备用同步标记，并开始酌情生成定时信号。 然后可以读取伺服扇区中的伺服脉冲串。

公开(公告)号：EP0183699A1

公开(公告)日：1986-06-11

申请号：EP85900332.0

申请日：1984-11-26

Applicant: DMA SYSTEMS CORPORATION

Inventor： PENNIMAN, Steven, K.

IPC: G11B5 ,  G11B21

CPC classification number: G11B21/106 ,  G11B5/59655

Abstract: Une servoconfiguration utilisée pour régler avec précision le positionnement de la tête transductrice d'une unité de disques comprend un espace d'effacement (36), suivi d'une rafale d'informations (37) à commande de gain automatique (AGC), suivie d'une première rafale d'informations de servocommande (38), et d'une deuxième rafale d'informations de servocommande (39). La servo-configuration est écrite sur le disque par l'unité de disque en utilisant un index mécanique (35) sur une armature associée à la rotation du disque en tant que première référence temporelle, toutes les autres références étant fondées sur la transition entre l'espace d'effacement et la rafale à AGC. La première et la seconde rafale d'informations de servocommande sont écrites alternativement hors piste, à une distance égale à la moitié de l'écart entre la piste pertinente et les deux pistes immédiatement adjacentes à celle-ci. Par le décodage de la configuration par comparaison de la forme d'onde (52) des informations de servocommande avec la pente de sortie (53) d'un intégrateur, l'on obtient des données de commande (54) de la position numérique afin de régler le transducteur de sorte qu'il soit centré sur la piste pertinente.

公开(公告)号：EP0113815A1

公开(公告)日：1984-07-25

申请号：EP83110300.7

申请日：1983-10-17

Applicant: International Business Machines Corporation

Inventor： Stephens, Harold Clark ,  Workman, Michael Lee

IPC: G11B21/08

CPC classification number: G11B5/59655

Abstract: A servo system for a magnetic disk file having a voice coil motor (VCM) actuator generates a position error signal (PES) from servo information recorded on one of the disks. An electrical model of the VCM is employed through which a measure of the VCM electrical current is passed to generate a simulated PES signal which is continuous even if the regular PES is sampled or intermittent.

公开(公告)号：EP0093716A1

公开(公告)日：1983-11-16

申请号：EP82901391.0

申请日：1982-04-26

Applicant: DMA SYSTEMS CORPORATION

Inventor： LEWIS, Martyn A. ,  PENNIMAN, Steven K. ,  SUTTON, David A.

IPC: G11B5 ,  G11B20 ,  G11B21

CPC classification number: G11B5/59655

Abstract: Dans un système de stockage à disque magnétique et un disque magnétique utilisé dans ce système, le disque possède des surfaces opposées, au moins l'une d'elles étant recouverte d'un matériau magnétique, le disque est monté sur une broche de manière à tourner par rapport à un transducteur magnétique positionné pour l'enregistrement et la lecture de données sur le disque, une pluralité de pistes annulaires concentriques sont définies à la surface du disque, chacune des pistes étant divisée en une pluralité de secteurs, à chacun desquels sont associées des servo-données préenregistrées pour son identification. Les servo-données pour chaque secteur comprennent un code d'identification de piste à distance unitaire (14) enregistrée trois fois de suite, le code étant variable entre des secteurs adjacents de pistes adjacentes, et un code de contrôle à décalage d'horloge (15) est enregistré immédiatement à la suite du dernier code d'identification de piste enregistré, le même code de contrôle à décalage d'horloge étant enregistré pour chaque secteur de chaque piste.

公开(公告)号：EP0031500A3

公开(公告)日：1981-09-16

申请号：EP80107634

申请日：1980-12-04

Applicant: International Business Machines Corporation

Inventor： Cunningham, Earl Albert

IPC: G11B05/58

CPC classification number: G11B5/59655 ,  G11B5/5965

Abstract: A servo system is disclosed for centering a transducer over a path defined by the boundary between adjacent servo tracks on a magnetic disk in which the servo tracks are each formed by alternate long and short magnetic segments, with the short segments in one track being centred with the long segments of adjacent tracks. The servo system includes a frequency doubler circuit (18) for producing a uniform frequency square wave signal of double the fundamental frequency of the analog signal picked up by the transducer from the servo encoding, a filter (77) connected with the transducer for producing an analog double frequency signal based on the analog signal from the transducer, a synchronous detector (80) functioning as a multiplier for multiplying the double frequency square wave signal with the analog double frequency signal from the transducer, and a filter (82) for averaging the resultant pulsating position error signal to provide a steady state position error signal for any particular position of the transducer over a pair of adjacent servo tracks. The steady state position error signal is applied to a servo control and servo actuator for moving the transducer until the steady state position error signal reaches zero which corresponds with the desired centred position of the transducer over the boundary between a pair of adjacent servo tracks.

公开(公告)号：EP1189222B1

公开(公告)日：2009-06-24

申请号：EP01122138.9

申请日：2001-09-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chu, Sang-Hoon ,  Shim, Jun-Seok ,  Yu, Seong-Hwan ,  Choi, Soo-il

IPC: G11B20/18 ,  G11B5/596 ,  G11B27/36

CPC classification number: G11B20/1883 ,  G11B5/59655 ,  G11B20/18 ,  G11B27/3027 ,  G11B27/36 ,  G11B2020/183 ,  G11B2220/20

公开(公告)号：EP1914730A3

公开(公告)日：2009-01-07

申请号：EP07253323.5

申请日：2007-08-22

Applicant: Hitachi Global Storage Technologies Netherlands B.V.

Inventor： Albrecht, Thomas Robert ,  Blaum, Mario ,  Lakovic, Ksenija ,  Wilson, Bruce Alexander ,  Yamamoto, Satoshi

IPC: G11B5/596 ,  G11B5/82 ,  G11B5/855 ,  G11B20/12

CPC classification number: G11B5/855 ,  B82Y10/00 ,  G11B5/59655 ,  G11B5/743 ,  G11B20/1403 ,  G11B20/1426 ,  G11B2020/1281 ,  G11B2020/1484 ,  G11B2220/2516

Abstract: Servo patterns for patterned media (1201,1202,1203,1208). The servo pattern includes specification of cylinder/track ID with and without a Gray code. The servo pattern space is minimized by the optimum usage of the islands (1204,1209). This is achieved by island allocation rules to take advantage of non-magnetic island. The island allocation also provides for easier lift-off. Logic is used to encode and decode the Gray code. Further, the Gray code is designed to stabilize the magnetic island (1204,1207)/ non-magnetic island (1205,1209) ratio to allow for easier manufacture.

公开(公告)号：EP1986185A1

公开(公告)日：2008-10-29

申请号：EP08250621.3

申请日：2008-02-22

Applicant: Hitachi Global Storage Technologies Netherlands B.V.

Inventor： Albrecht, Thomas R. ,  Bandic, Zvonimir Z.

IPC: G11B5/596

CPC classification number: G11B5/865 ,  B82Y10/00 ,  G11B5/59655 ,  G11B5/59688 ,  G11B5/743 ,  G11B5/82

Abstract: A magnetic recording disk in a disk drive has identical pre-patterned servo patterns on its front and back surfaces. The servo patterns on each disk surface are pre-patterned with a single master template, resulting in the identical pattern on each disk surface. The servo sectors on the two disk surfaces can form identical patterns of angularly spaced arcuate-shaped lines or straight lines that extend radially across the data tracks. However, because the lines on at least one of the disk surfaces do not replicate the path of the recording head, the sampling rate of the servo sectors on that surface is not constant but varies with radial position of the head. To accommodate this, the disk drive's servo control system calculates a timing adjustment from an estimate of the radial position of the head and uses this timing adjustment to adjust the time to open a time window to allow detection of the servo sectors.

Abstract translation: 在磁盘驱动器的磁记录磁盘在其正面和背面上相同的预图案化的伺服图案。 在每个磁盘表面上的伺服图案被预图案化有一个单一的主模板，在每个磁盘表面上的相同的图案得到的。 两个盘表面上的伺服扇区可以形成成角度隔开的弓形或直线的相同图案并穿过数据磁道径向延伸。 然而，由于在盘表面中的至少一项所述的线不复制记录头的路径，在没有表面的伺服扇区的采样率不是恒定的而是与头的径向位置而变化。 为了适应这种情况，磁盘驱动器的伺服控制系统从所述头部的径向位置的估计计算定时调整，并使用该定时调整来调整打开时间窗以允许伺服扇区的检测的时间。