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1.发明专利
公开(公告)号：JP2002197816A
公开(公告)日：2002-07-12
申请号：JP2001325964
申请日：2001-10-24
Applicant: IBM
Inventor： GREEN MARTIN REN , STEPHENSON JOHN JEFFREY , STICH MICHAEL CHARLES
Abstract: PROBLEM TO BE SOLVED: To accelerate and then decelerate an actuator arm so as to reduce the seek time of the arm in order to increase the data processing speed of a computer system. SOLUTION: Supplying a maximum current to a voice coil accelerates the actuator arm, and when the actuator arm travels by a prescribed distance, the direction of current is changed and a deceleration current is supplied in a saturation mode to the actuator arm to decelerate the actuator arm, Applying the deceleration current in the saturation mode can properly decelerate the actuator arm and allows the arm to come to a stop when the actuator arm reaches an object track position.
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公开(公告)号：DE69125972D1
公开(公告)日：1997-06-12
申请号：DE69125972
申请日：1991-06-14
Applicant: IBM
Inventor： GREEN MARTIN REN , STEPHENSON JOHN JEFFREY , STICH MICHAEL CHARLES
Abstract: Disclosed is a method for performing a seek operation in a disk drive using current in the saturation mode to accelerate and decelerate the actuator arm. In a first embodiment, several measurements are made during the acceleration portion of the seek to estimate the deceleratlon available in saturation mode. In a second embodiment, the point at which the current is switched from acceleration current to deceleration current is adjusted based upon the position where the actuator arm comes within a desired amount of the velocity of a velocity profile assuming worst case conditions.
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公开(公告)号：DE69125972T2
公开(公告)日：1997-10-23
申请号：DE69125972
申请日：1991-06-14
Applicant: IBM
Inventor： GREEN MARTIN REN , STEPHENSON JOHN JEFFREY , STICH MICHAEL CHARLES
Abstract: Disclosed is a method for performing a seek operation in a disk drive using current in the saturation mode to accelerate and decelerate the actuator arm. In a first embodiment, several measurements are made during the acceleration portion of the seek to estimate the deceleratlon available in saturation mode. In a second embodiment, the point at which the current is switched from acceleration current to deceleration current is adjusted based upon the position where the actuator arm comes within a desired amount of the velocity of a velocity profile assuming worst case conditions.
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公开(公告)号：CA2050152C
公开(公告)日：1996-07-09
申请号：CA2050152
申请日：1991-08-28
Applicant: IBM
Inventor： GREEN MARTIN REN , HEINEKE RANDOLPH BRUCE , STEPHENSON JOHN JEFFREY
Abstract: A transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track is written on a first data disk surface aligned with a predefined servo information track on the dedicated servo disk surface. Then servo reference tracks are sequentially written on each successive consecutive data disk surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.
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Patent Agency Ranking
公开(公告)号：SG46503A1
公开(公告)日：1998-02-20
申请号：SG1996005306
申请日：1991-08-29
Applicant: IBM
Inventor： GREEN MARTIN REN , HEINEKE RANDOLPH BRUCE , STEPHENSON JOHN JEFFREY
Abstract: A transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track (R0) is written on a first data disk (18) surface aligned with a predefined servo information track (22) on the dedicated servo disk (20) surface. Then servo reference tracks (R1-R13) are sequentially written on each successive consecutive data disk (18) surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.
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公开(公告)号：DE69118803D1
公开(公告)日：1996-05-23
申请号：DE69118803
申请日：1991-08-29
Applicant: IBM
Inventor： GREEN MARTIN REN , HEINEKE RANDOLPH BRUCE , STEPHENSON JOHN JEFFREY
Abstract: A transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track (R0) is written on a first data disk (18) surface aligned with a predefined servo information track (22) on the dedicated servo disk (20) surface. Then servo reference tracks (R1-R13) are sequentially written on each successive consecutive data disk (18) surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.
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公开(公告)号：SG42836A1
公开(公告)日：1997-10-17
申请号：SG1996000009
申请日：1991-06-14
Applicant: IBM
Inventor： GREEN MARTIN REN , STEPHENSON JOHN JEFFREY , STICH MICHAEL CHARLES
Abstract: Disclosed is a method for performing a seek operation in a disk drive using current in the saturation mode to accelerate and decelerate the actuator arm. In a first embodiment, several measurements are made during the acceleration portion of the seek to estimate the deceleratlon available in saturation mode. In a second embodiment, the point at which the current is switched from acceleration current to deceleration current is adjusted based upon the position where the actuator arm comes within a desired amount of the velocity of a velocity profile assuming worst case conditions.
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公开(公告)号：HK202696A
公开(公告)日：1996-11-15
申请号：HK202696
申请日：1996-11-07
Applicant: IBM
Inventor： GREEN MARTIN REN , HEINEKE RANDOLPH BRUCE , STEPHENSON JOHN JEFFREY
Abstract: A transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track (R0) is written on a first data disk (18) surface aligned with a predefined servo information track (22) on the dedicated servo disk (20) surface. Then servo reference tracks (R1-R13) are sequentially written on each successive consecutive data disk (18) surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.
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公开(公告)号：DE69118803T2
公开(公告)日：1996-10-10
申请号：DE69118803
申请日：1991-08-29
Applicant: IBM
Inventor： GREEN MARTIN REN , HEINEKE RANDOLPH BRUCE , STEPHENSON JOHN JEFFREY
Abstract: A transducer head skew arrangement used in a multiple disk drive data storage system is provided. The disk drive unit includes a plurality of magnetic disk surfaces mounted for simultaneous rotation about an axis. A first sequence of servo information tracks are arrayed on a dedicated servo disk surface. At least one servo reference track is written on each data disk surface for storing servo reference information. The servo reference track (R0) is written on a first data disk (18) surface aligned with a predefined servo information track (22) on the dedicated servo disk (20) surface. Then servo reference tracks (R1-R13) are sequentially written on each successive consecutive data disk (18) surface progressively offset radially from the last written servo reference track. A plurality of data information tracks for storing data are disposed at predetermined positions relative to the servo reference track on each the data disk surface. A servo transducer head is mounted for movement in a radial direction across the first dedicated servo information for reading servo information; and a plurality of data transducer heads are mounted for movement with the servo transducer head in a radial direction across the disk surfaces for reading the servo reference tracks and for reading and/or writing data to the data information tracks. The distance moved by transducer heads for a cylinder switch is the same distance moved for each head switch, so that track-to-track seek time is minimized without requiring any additional time delay for each head switch. An overall data transfer rate increases for every data transfer accessing more than one data cylinder.
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