公开(公告)号：DE69224258T2

公开(公告)日：1998-08-13

申请号：DE69224258

申请日：1992-10-07

Applicant: IBM

Inventor： FUKUSHIMA YUKIO ,  KIMURA JUNICHI

IPC: G11B5/54 ,  G11B21/02 ,  G11B21/12 ,  G11B21/22

Abstract: The present invention relates to an actuator device comprising a fixed member (3), an actuator (5, 6) co-operating with the fixed member when it is in an operating position, driving means (9, 13) for driving the actuator so that it moves relative to the fixed member, locking means (10, 11, 12) for locking the actuator in a secure position, and unlocking means for unlocking the actuator and moving it into its operating position relative to the fixed member. According to the invention the device is characterised in that the unlocking means comprises means (14, 15) for supplying predetermined accelerating and decelerating control signals to the driving means so as to move the actuator out of its secure position and into its operating position.

公开(公告)号：DE69224258D1

公开(公告)日：1998-03-05

申请号：DE69224258

申请日：1992-10-07

Applicant: IBM

Inventor： FUKUSHIMA YUKIO ,  KIMURA JUNICHI

IPC: G11B5/54 ,  G11B21/02 ,  G11B21/12 ,  G11B21/22

Abstract: The present invention relates to an actuator device comprising a fixed member (3), an actuator (5, 6) co-operating with the fixed member when it is in an operating position, driving means (9, 13) for driving the actuator so that it moves relative to the fixed member, locking means (10, 11, 12) for locking the actuator in a secure position, and unlocking means for unlocking the actuator and moving it into its operating position relative to the fixed member. According to the invention the device is characterised in that the unlocking means comprises means (14, 15) for supplying predetermined accelerating and decelerating control signals to the driving means so as to move the actuator out of its secure position and into its operating position.

公开(公告)号：JP2000173198A

公开(公告)日：2000-06-23

申请号：JP33615298

申请日：1998-11-26

Applicant: IBM

Inventor： KIMURA JUNICHI ,  HASHIMOTO SATOSHI ,  KISAKA MASASHI

IPC: G11B20/10 ,  G11B5/00 ,  G11B5/012 ,  G11B20/12 ,  G11B20/18 ,  G11B27/36

Abstract: PROBLEM TO BE SOLVED: To easily detect the error caused by thermal asperity by controlling a recording and reproducing means and executing an error recovery processing without conducting a compensation by a compensating means when an error is detected in a recording and reproducing operation. SOLUTION: An arm electronic circuit (AE) 3 is provided with a signal adaptive filter 3a. The SAF 3a reduces the adverse effect caused by thermal asperity (TA) through eliminating the low frequency components of the reproduced output of a head 2, for example. Note that the operation of the SAF 3a is made controllable from an MPU 7, the SAF 3a is invalidated while executing an ERP, and TA is positively detected. By adding a step which invalidates the operation of the SAF3a that compensates for the reproduced output of the head 2 during an error recovery processing, thermal asperity is easily detected and the data sector, in which TA is generated, is surely registered as a defective sector.

公开(公告)号：JPH0574126A

公开(公告)日：1993-03-26

申请号：JP26050091

申请日：1991-09-12

Applicant: IBM

Inventor： TAKAGI TATSUO ,  KIMURA JUNICHI

IPC: G11B25/04 ,  G11B33/12

Abstract: PURPOSE: To achieve a low-profile disk storage device. CONSTITUTION: A housing in which a head disk assembly is incorporated is to be electrically connected with a card 3 equipped with an electronic control circuit. For this purpose, a substrate 4 of the housing is provided with a first connector 9; a second connector 10 is provided in a through hole 3e made in the card 3, being projected from both opening ends of the through hole 3e, and both connectors are engaged. Consequently, the whole disk storage device can be made thinner by the thickness of the card.

公开(公告)号：JPH05128754A

公开(公告)日：1993-05-25

申请号：JP29488291

申请日：1991-10-16

Applicant: IBM

Inventor： FUKUSHIMA YUKIO ,  KIMURA JUNICHI

IPC: G11B5/54 ,  G11B21/02 ,  G11B21/12 ,  G11B21/22

Abstract: PURPOSE: To detach an actuator from magnetic attraction force at the time of starting the operation of the disk storage device of a type for preventing the damage of the device by fixing the actuator for moving a conversion head on a recording medium by the magnetic attraction force when it is not in the operation. CONSTITUTION: An acceleration current Ia and acceleration time Ta to be added to the actuator 6 required for performing detachment against the attraction force of a permanent magnet 12 and a deceleration current Id and deceleration time Td to be added to the actuator 6 required for stopping the detached actuator 6 to the prescribed position of a data area are supplied to the disk storage device 1 beforehand. At the time of releasing the fixation of the actuator 6, the actuator is driven corresponding to the acceleration current, the acceleration time, the deceleration current and the deceleration time stored beforehand.