公开(公告)号：US06236527B1

公开(公告)日：2001-05-22

申请号：US09103758

申请日：1998-06-24

申请人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

发明人： Hiroshi Uchiike ,  Kenji Ogasawara ,  Yoshiro Amano ,  Masahiro Shimizu ,  Shusuke Kurihara ,  Kazunari Tsuchimto ,  Nobuyuki Kitazaki ,  Shinji Ueno ,  Isao Yoneda ,  Yuji Yokoe ,  Fuminori Sai

IPC分类号： G11B2102

CPC分类号： G11B19/04 ,  G11B5/54 ,  G11B21/12

摘要： A disk drive with means to prevent accidental landing of a head/slider on the disk surface is described. In one embodiment a shock sensor is provided to sense external shocks received by the mechanism. During loading (positioning) of the actuator bearing the head/slider over the disk, if a shock is sensed, loading is stopped and an immediate unloading is performed to return the actuator to the withdrawn position. In another embodiment the unload operation is performed when the rotational speed of the disk is changed. In another embodiment the unload operation is performed when the rotational speed of the disk drops below a threshold. A circuit and method for detecting when the rotational speed of the disk drops below a threshold is also provided. The unloading in the various embodiments may be performed using velocity control or without velocity control.

摘要翻译： 描述了具有防止头/滑块在盘表面上意外着落的装置的磁盘驱动器。 在一个实施例中，提供了一种震动传感器来感测由机构接收的外部冲击。 在将头/滑块轴承到盘上的执行器的装载（定位）期间，如果感测到冲击，则停止加载，并立即执行卸载以将执行器返回到撤回位置。 在另一个实施例中，当盘的旋转速度改变时执行卸载操作。 在另一个实施例中，当盘的转速下降到阈值以下时，执行卸载操作。 还提供了一种用于检测盘的转速何时下降到阈值以下的电路和方法。 各种实施例中的卸载可以使用速度控制或无速度控制来执行。

公开(公告)号：US5923491A

公开(公告)日：1999-07-13

申请号：US681411

申请日：1996-07-22

申请人： Masashi Kisaka ,  Nobuyuki Kitazaki ,  Takashi Nakamura ,  Yuji Yokoe ,  Isao Yoneda

发明人： Masashi Kisaka ,  Nobuyuki Kitazaki ,  Takashi Nakamura ,  Yuji Yokoe ,  Isao Yoneda

IPC分类号： G11B5/596 ,  G11B21/10

CPC分类号： G11B21/106 ,  G11B5/59627 ,  G11B5/59633

摘要： The present invention determines whether a filter is used for reading and writing on a disk to correct repeatable runout. The invention estimates the magnitude of repeatable runout for each disk by measuring the maximum absolute value of a state variable of a filter when the disk is turned on or when the disk returns from a sleep mode, and compares the measured value to a predetermined criterion such as the track width. If the magnitude of the repeatable runout is less than or equal to the predetermined criterion, the filter is not used. If the magnitude of the repeatable runout exceeds the predetermined criterion, the invention reads and writes data using the filter.

摘要翻译： 本发明确定滤波器是否用于读取和写入磁盘以校正可重复的跳动。 本发明通过测量当盘被打开时或当盘从睡眠模式返回时的过滤器的状态变量的最大绝对值，来估计每个盘的可重复跳动的幅度，并将测量值与预定标准 作为轨道宽度。 如果可重复跳动的幅度小于或等于预定标准，则不使用滤波器。 如果可重复跳动的幅度超过预定标准，本发明使用滤波器读取和写入数据。

公开(公告)号：US5754355A

公开(公告)日：1998-05-19

申请号：US633596

申请日：1996-04-17

申请人： Takashi Nakamura ,  Isao Yoneda ,  Yuji Yokoe ,  Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Kenji Ogasawara

发明人： Takashi Nakamura ,  Isao Yoneda ,  Yuji Yokoe ,  Kazushi Tsuwako ,  Fujio Harako ,  Katsumi Suda ,  Michio Nakajima ,  Kenji Ogasawara

IPC分类号： G11B5/00 ,  G11B5/60 ,  G11B19/04 ,  G11B19/20 ,  G11B23/50 ,  G11B15/46

CPC分类号： G11B5/6005 ,  G11B19/04 ,  G11B19/20 ,  G11B23/505 ,  G11B2005/0016

摘要： A disk drive apparatus and read error recovery method in a disk drive apparatus removes thermal asperities on disk surfaces. A projection, such as a thermal asperity, on the recording surfaces of disks is detected when a signal transducer head contacts the projection. The flying height of the signal transducer head is lowered, e.g., by changing the disk rotation speed from the normal rotation speed in read/write operations or by heating a suspension having a bimetal element, while the signal transducer head is positioned over the detected projection on the track. The signal transducer head strikes the projection to break the projection. This avoids a subsequent error from being caused by the thermal asperity.

摘要翻译： 磁盘驱动装置中的磁盘驱动装置和读取错误恢复方法去除磁盘表面上的热凹凸。 当信号传感器头接触投影时，检测到盘的记录表面上的诸如热不均匀性的投影。 信号传感器头的飞行高度例如通过在读/写操作中通过将盘旋转速度从正常旋转速度改变或通过加热具有双金属元件的悬架而降低，同时信号传感器头位于检测到的投影上方 在轨道上。 信号传感器头撞击突起以断开突起。 这避免了由于热不平坦造成的后续错误。

公开(公告)号：US5561566A

公开(公告)日：1996-10-01

申请号：US356427

申请日：1994-12-15

申请人： Yuji Kigami ,  Koji Kurachi ,  Takao Matsui ,  Takashi Nakamura ,  Tsutomu Numata ,  Kenji Ogasawara ,  Mayumi Okada ,  Yuji Yokoe

发明人： Yuji Kigami ,  Koji Kurachi ,  Takao Matsui ,  Takashi Nakamura ,  Tsutomu Numata ,  Kenji Ogasawara ,  Mayumi Okada ,  Yuji Yokoe

IPC分类号： G11B20/10 ,  G11B5/012 ,  G11B5/09 ,  G11B19/02 ,  G11B20/12 ,  G11B20/18 ,  G11B27/10

CPC分类号： G11B20/1883 ,  G11B19/02 ,  G11B20/1258 ,  G11B5/012 ,  G11B2020/10916 ,  G11B2020/1234 ,  G11B2020/1282 ,  G11B2220/20

摘要： A disk drive having embedded servo information accesses data without using sector identifier recorded in each sector. When a signal sector pulse signal (SP) at the end of a servo area is detected in a dead state during start up, a first data state for the start of a sector transits to a second data state for the litter region of the sector being divided in accordance with the capacity stored in a current sector's pointer register. At the beginning of the sector, the contents of a next sector's pointer register is stored in current sector's pointer register and the contents of a next sector's operation register is stored in a current sector's operation register. Upon completion of sector processing, the first data state is maintained when the next sector is contiguous. When a terminate instruction is stored in current sector's operation register, the process moves to dead state. When the servo area arrives, the process moves to idle state. Responsive to this state, the magnetic head is activated to enable read and write operation for sectors having no sector identifier on the disk.

摘要翻译： 具有嵌入式伺服信息的磁盘驱动器访问数据而不使用记录在每个扇区中的扇区标识符。 当在起动期间在死区中检测到伺服区域结束处的信号扇区脉冲信号（SP）时，用于扇区开始的扇区的第一数据状态转换到第二数据状态，用于扇区的凋落物区域为 根据存储在当前扇区的指针寄存器中的容量进行划分。 在扇区的开始处，下一个扇区的指针寄存器的内容存储在当前扇区的指针寄存器中，下一个扇区的操作寄存器的内容存储在当前扇区的操作寄存器中。 在扇区处理完成时，当下一扇区连续时，保持第一数据状态。 当终止指令存储在当前扇区的操作寄存器中时，进程进入死区。 当伺服区到达时，过程进入空闲状态。 响应于该状态，磁头被激活，以便能够对盘上没有扇区标识符的扇区进行读写操作。

公开(公告)号：US06553501B1

公开(公告)日：2003-04-22

申请号：US09448161

申请日：1999-11-24

申请人： Yuji Yokoe

发明人： Yuji Yokoe

IPC分类号： G06F126

CPC分类号： G06F1/3268 ,  G06F1/3203 ,  Y02D10/154

摘要： A system which reduces power dissipation in a data storage device having a normal operating mode and at least one power saving mode by computing a predicted amount of power that would be saved by the device if the device makes a transition from the normal operating mode to the power saving mode; computing a time at which the device should transition from the normal operating mode to the power saving mode, based on at least one predicted amount of power to be saved; and transitioning the device from the normal operating mode to the power saving mode.

摘要翻译： 一种通过计算设备将从正常操作模式转换到该设备将被保存的预测的功率量来减少具有正常操作模式和至少一个功率节省模式的数据存储设备中的功耗的系统。 省电模式; 基于要被保存的功率的至少一个预测量来计算设备将从正常操作模式转换到省电模式的时间; 并将设备从正常操作模式转换到省电模式。

公开(公告)号：US6134071A

公开(公告)日：2000-10-17

申请号：US93963

申请日：1998-06-08

申请人： Haruo Andoh ,  Keiji Kobayashi ,  Yuji Yokoe ,  Kazunari Tsuchimoto

发明人： Haruo Andoh ,  Keiji Kobayashi ,  Yuji Yokoe ,  Kazunari Tsuchimoto

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

CPC分类号： G11B21/12 ,  G11B21/22 ,  G11B5/54

摘要： The present invention provides a disk drive, a load/unload unit, and a control method thereof which are capable of reliably unloading a head slider from a disk when power is turned off and enhancing reliability. A disk drive is equipped with a VCM spindle driver for rotating a disk, a magnetic head, an actuator mechanism for moving over the surface of the magnetic disk or to an evacuating position a head slider having the magnetic head, a ramp block, and a CPU/HDC (control means) for performing control of load and unload operations, speed control of the actuator mechanism, and control of an operation of reading or writing data from or to the disk. The CPU/HDC receives a specific command issued from the host immediately before power is turned off, and executes this command, then executes unload control, and notifies the host of command completion after the unload control has been completed.

摘要翻译： 本发明提供了一种磁盘驱动器，装载/卸载单元及其控制方法，其能够在电源关闭时提供可靠地从磁盘卸载磁头滑块并提高可靠性。 磁盘驱动器配备有用于旋转磁盘的VCM主轴驱动器，磁头，用于在磁盘表面上移动的致动器机构或者具有磁头的磁头滑块，斜坡块和 用于执行加载和卸载操作的控制的CPU / HDC（控制装置），致动器机构的速度控制以及从盘读取或写入数据的操作的控制。 在电源关闭之前，CPU / HDC接收到从主机发出的特定命令，并执行该命令，然后执行卸载控制，并在卸载控制完成后通知主机命令完成。

公开(公告)号：US06336202B1

公开(公告)日：2002-01-01

申请号：US09149535

申请日：1998-09-08

申请人： Kazunari Tsuchimoto ,  Kayo Takahashi ,  Yuji Yokoe ,  Shigemi Suganuma

发明人： Kazunari Tsuchimoto ,  Kayo Takahashi ,  Yuji Yokoe ,  Shigemi Suganuma

IPC分类号： G11C2900

CPC分类号： G11B20/1883 ,  G11B2220/20

摘要： A data storage system, a storage medium and a method of controlling a data storage system are described, which allow defects on a storage medium to be handled with a memory region of a reduced size. In one embodiment defective sectors are determined on a magnetic disk and recorded in a defect map as a starting address and a number (length) of consecutive defective sectors to more efficiently record defective sector bursts than in the prior art. Optionally a mixed format defect map may record defective sector bursts as above and single sector defects as an address without a number of consecutive defective sectors.

摘要翻译： 描述了数据存储系统，存储介质和控制数据存储系统的方法，其允许以较小尺寸的存储区域处理存储介质上的缺陷。 在一个实施例中，在磁盘上确定缺陷扇区，并将其记录在缺陷图中，作为起始地址和连续缺陷扇区的数量（长度），以便比现有技术更有效地记录缺陷扇区突发。 可选地，混合格式缺陷图可以如上记录缺陷扇区脉冲串和单扇区缺陷作为没有多个连续缺陷扇区的地址。