Method for registering a defect map within a hard disk drive
    11.
    发明授权
    Method for registering a defect map within a hard disk drive 失效
    在硬盘驱动器内注册缺陷图的方法

    公开(公告)号:US06850379B2

    公开(公告)日:2005-02-01

    申请号:US10075928

    申请日:2002-02-14

    摘要: A method for registering a defect map within a hard disk drive is disclosed. A hard disk drive includes a recording disk, a head assembly, and a controller. Multiple sectors are formed on the recording disk, and the head assembly includes a head for reading/writing data from/to the recording disk. The controller, which controls the head assembly to read/write data from/to the recording disk, includes a defect sector positional information holding device and a sector identification device. The defect sector positional information holding device holds positional information of a defect sector disabled to read/write data therefrom/thereto the recording disk. The positional information includes the number of the defect sectors continued in a circumferential direction and in a radial direction of the recording disk. The sector identification device refers to the positional information of the defect sector so as to identify a target sector from/in which data is to be read/written when a read/write command is received from a host computer.

    摘要翻译: 公开了一种在硬盘驱动器内注册缺陷图的方法。 硬盘驱动器包括记录盘,头组件和控制器。 在记录盘上形成多个扇区,并且头部组件包括用于从记录盘读取/写入数据的头部。 控制头部组件从记录盘读取/写入数据的控制器包括缺陷扇区位置信息保持装置和扇区识别装置。 缺陷扇区位置信息保持装置保持将记录盘从其读/写数据禁止的缺陷扇区的位置信息。 位置信息包括在记录盘的圆周方向和径向方向上连续的缺陷扇区的数量。 扇区识别装置参考缺陷扇区的位置信息,以便当从主计算机接收到读/写命令时,识别/写入数据的目标扇区。

    Method for preparing cobalt-containing iron oxide magnetic particles
    13.
    发明授权
    Method for preparing cobalt-containing iron oxide magnetic particles 失效
    制备含钴氧化铁磁性颗粒的方法

    公开(公告)号:US4741921A

    公开(公告)日:1988-05-03

    申请号:US858575

    申请日:1986-04-24

    IPC分类号: G11B5/706 C01G49/06

    摘要: Cobalt-containing iron oxide magnetic particles having a high coercive force and a small surface electrical resistance which are useful as a recording element for a magnetic recording medium, and a method for the preparation of the same comprising reducing acicular .gamma.-Fe.sub.2 O.sub.3 particles in a reducing gas or liquid until the iron oxide reaches an intermediate oxidation state between .gamma.-Fe.sub.2 O.sub.3 and Fe.sub.3 O.sub.4, dispersing the resulting iron oxide particles into an aqueous solution containing a cobalt salt and optionally a ferrous salt and an alkali of one equivalent or more to the metal salt(s), and heating the mixture at a temperature of higher than room temperature up to a boiling point of the mixture under an atmospheric condition such that the divalent iron is substantially not oxidized. The cobalt is thereby predominantly incorporated into the most outer layer of the acicular iron oxide particles.

    摘要翻译: 可用作磁记录介质的记录元件的具有高矫顽力和小表面电阻的含钴氧化铁磁性颗粒及其制备方法包括还原针状γ-Fe2O3颗粒的还原性 气体或液体,直到氧化铁在γ-Fe 2 O 3与Fe 3 O 4之间达到中间氧化态,将得到的氧化铁颗粒分散到含有钴盐和任选的亚铁盐和一当量或更多的碱金属盐的水溶液中 并在大气条件下在高于室温的温度下将该混合物加热到混合物的沸点,使得二价铁基本上不被氧化。 因此,钴主要并入针状氧化铁颗粒的最外层。

    Medium drive and method of generating a defect map for registering positions of defects on a medium
    14.
    发明授权
    Medium drive and method of generating a defect map for registering positions of defects on a medium 失效
    介质驱动器和产生用于在介质上记录缺陷位置的缺陷图的方法

    公开(公告)号:US07562270B2

    公开(公告)日:2009-07-14

    申请号:US11654045

    申请日:2007-01-16

    申请人: Haruo Andoh

    发明人: Haruo Andoh

    IPC分类号: G11C29/00

    摘要: A hard disk drive (HDD) according to an embodiment of the present invention uses three primary defect map (PDM) formats: a single-sector entry format; a multi-sector entry format; and a two-dimensional sector entry format. Methods of registering defective sectors in each such format are illustrated. Defects can be appropriately registered in a limited RAM capacity by selecting an appropriate format according to states of the defects on a magnetic disk.

    摘要翻译: 根据本发明的实施例的硬盘驱动器(HDD)使用三个主要缺陷映射(PDM)格式:单扇区输入格式; 多扇区录入格式; 和二维扇区输入格式。 示出了以各种格式记录缺陷扇区的方法。 通过根据磁盘上的缺陷的状态选择适当的格式,可以在有限的RAM容量中适当地登记缺陷。

    Data storage device and error correction method
    15.
    发明申请
    Data storage device and error correction method 审中-公开
    数据存储装置和纠错方法

    公开(公告)号:US20080016429A1

    公开(公告)日:2008-01-17

    申请号:US11787109

    申请日:2007-04-12

    IPC分类号: G11C29/00

    摘要: Embodiments in accordance with the present invention increase the reliability of a data storage device, and to reduce the circuit size. According to one embodiment of the present invention, a hard disk drive (HDD) executes not only error correction processing of data to be written to a magnetic disk, but also error correction processing of data stored in the DRAM. In the HDD according to this embodiment, one SRAM is shared by both kinds of error correction processing. As a result of executing the error correction processing of the data stored in the DRAM, the reliability of the HDD is improved. In addition, by using the same SRAM for the two kinds of error correction processing that differ from each other, it is possible to suppress the increase in circuit size.

    摘要翻译: 根据本发明的实施例增加了数据存储装置的可靠性,并且减小了电路尺寸。 根据本发明的一个实施例,硬盘驱动器(HDD)不仅执行要写入磁盘的数据的纠错处理,还执行存储在DRAM中的数据的错误校正处理。 在根据本实施例的HDD中,通过两种错误校正处理来共享一个SRAM。 作为对存储在DRAM中的数据进行纠错处理的结果,提高了HDD的可靠性。 此外,通过对于彼此不同的两种纠错处理使用相同的SRAM,可以抑制电路尺寸的增加。

    Disk drive, method for controlling the same, and method for manufacturing the same
    16.
    发明申请
    Disk drive, method for controlling the same, and method for manufacturing the same 审中-公开
    磁盘驱动器,其控制方法及其制造方法

    公开(公告)号:US20070274000A1

    公开(公告)日:2007-11-29

    申请号:US11807034

    申请日:2007-05-25

    IPC分类号: G11B21/02

    CPC分类号: G11B19/20 G11B5/00

    摘要: Embodiments in accordance with the present invention prevent abnormal action of the actuator of a disk drive. According to an embodiment of the invention, in the process of startup (power on reset (POR)), a hard disk drive (HDD) checks whether an arm electronics (AE) port table stored in an EEPROM agrees with the ports of an AE to which head device portions are actually connected before it starts the rotation of a magnetic disk to move the actuator onto a user data area. Thus, even if an HDA and a reused circuit board do not agree at the manufacture of the HDD, the abnormal action of the actuator can be prevented.

    摘要翻译: 根据本发明的实施例防止磁盘驱动器的致动器的异常动作。 根据本发明的实施例,在启动(上电复位(POR))的过程中,硬盘驱动器(HDD)检查存储在EEPROM中的臂电子设备(AE)端口表是否与AE的端口一致 在开始旋转磁盘以将致动器移动到用户数据区域之前,头部装置部分实际连接到哪个头部装置部分。 因此,即使HDA和重用电路板在制造HDD时不一致,也可以防止致动器的异常动作。

    Magnetic recording medium
    18.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:US4946374A

    公开(公告)日:1990-08-07

    申请号:US287648

    申请日:1988-12-21

    IPC分类号: C09D5/23 C09D7/12 G11B5/716

    摘要: A magnetic recording medium which comprises a first magnetic layer on a base and a second magnetic layer thereon, the first magnetic layer containing magnetic particles having an average particle length (long axis diameter) of 0.4 to 0.7 .mu., the second magnetic layer containing magnetic particles having an average particle length (long axis diameter) of 0.25 to 0.35 .mu., the coercive force of which being 370 to 460 oersteds, and the ratio of coercive force of the upper or second layer to that of the lower or first magnetic layer being 1.05/l to 1.5/l. The magnetic recording medium has excellent sensitivity and frequency characteristics at entire frequency bands with less noise.

    摘要翻译: 一种磁记录介质,包括在基底上的第一磁性层和其上的第二磁性层,所述第一磁性层含有平均粒子长度(长轴直径)为0.4至0.7μm的磁性颗粒,所述第二磁性层含有磁性颗粒 平均粒径(长轴直径)为0.25〜0.35μm,矫顽力为370〜460奥斯特,上层或第二层与下层或第一层的矫顽力比为1.05 / l至1.5 / l。 磁记录介质在噪声较小的整个频段具有优异的灵敏度和频率特性。

    Disk drive and method of controlling the same
    19.
    发明授权
    Disk drive and method of controlling the same 失效
    磁盘驱动器及其控制方法

    公开(公告)号:US07362539B2

    公开(公告)日:2008-04-22

    申请号:US11288685

    申请日:2005-11-28

    申请人: Haruo Andoh

    发明人: Haruo Andoh

    IPC分类号: G11B5/596 G11B21/02

    CPC分类号: G11B5/5547

    摘要: Embodiments of the invention provide a disk drive capable of preventing the deterioration of performance. In one embodiment, a disk drive includes a disk medium; a head capable of performing a read/write operation for accessing the disk medium to read information from and to write information to the disk medium; a head controller for controlling the position of the head so that the head describes a substantially spiral trajectory relative to the disk medium; and a controller capable of controlling the head controller, of performing a read/write operation for reading or writing information with reference to an identifier table associating sector identifiers identifying sectors on a specified track with logical block addresses, and of creating an identifier table for a track to be accessed next during the read/write operation.

    摘要翻译: 本发明的实施例提供一种能够防止性能下降的磁盘驱动器。 在一个实施例中,磁盘驱动器包括磁盘介质; 能够执行用于访问盘介质的读/写操作以从盘介质读取信息并向盘介质写入信息的头; 头部控制器,用于控制头部的位置,使得头部相对于盘介质描述基本上螺旋的轨迹; 以及能够控制头控制器的控制器,参考将识别指定轨道上的扇区的扇区标识符与逻辑块地址相关联的标识符表执行用于读取或写入信息的读/写操作,以及创建用于 在读/写操作期间接下来要访问的轨道。