公开(公告)号：US07486485B2

公开(公告)日：2009-02-03

申请号：US11262531

申请日：2005-10-28

申请人： Takehiko Hamaguchi ,  Yoshihisa Kamo ,  Hideaki Maeda ,  Yukiya Shimizu ,  Ikuya Tagawa ,  Tetsuo Yuki

发明人： Takehiko Hamaguchi ,  Yoshihisa Kamo ,  Hideaki Maeda ,  Yukiya Shimizu ,  Ikuya Tagawa ,  Tetsuo Yuki

IPC分类号： G11B5/127

CPC分类号： G11B5/3143 ,  G11B5/11 ,  G11B5/1278

摘要： Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having a magnetic field shield in the vicinity of a main pole, and a cover of the device, using a constituent material with a magnetic field shielding effect, across the cover, or at part thereof. When a stray field in a direction perpendicular to a recording medium is applied, the effect of the magnetic field is alleviated by the magnetic field shield installed in the vicinity of the main pole. In such a case, it need only be sufficient to form the magnetic field shield in a shape optimum for removing the stray field in the perpendicular direction only. When a stray field in a direction horizontal in relation to the recording medium is applied, the magnetic field acting on the recording medium is removed by the cover of the device comprising a magnetic component.

摘要翻译： 本发明的实施例不管施加杂散场的方向如何，都防止磁化或退磁的发生发生到记录磁化。 在一个实施例中，一种用于数据存储系统的装置包括在主极附近具有磁场屏蔽的头部，以及使用具有磁场屏蔽效应的组成材料穿过该盖的装置的盖，或者在 的一部分。 当施加与记录介质垂直的方向上的杂散场时，通过安装在主极附近的磁场屏蔽来减轻磁场的影响。 在这种情况下，只需要使磁场屏蔽形成为仅在垂直方向上去除杂散场的最佳形状。 当施加相对于记录介质的水平方向的杂散场时，作用在记录介质上的磁场被包括磁性部件的装置的盖子去除。

公开(公告)号：US20060092556A1

公开(公告)日：2006-05-04

申请号：US11262531

申请日：2005-10-28

申请人： Takehiko Hamaguchi ,  Yoshihisa Kamo ,  Hideaki Maeda ,  Yukiya Shimizu ,  Ikuya Tagawa ,  Tetsuo Yuki

发明人： Takehiko Hamaguchi ,  Yoshihisa Kamo ,  Hideaki Maeda ,  Yukiya Shimizu ,  Ikuya Tagawa ,  Tetsuo Yuki

IPC分类号： G11B17/00

CPC分类号： G11B5/3143 ,  G11B5/11 ,  G11B5/1278

摘要： Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having a magnetic field shield in the vicinity of a main pole, and a cover of the device, using a constituent material with a magnetic field shielding effect, across the cover, or at part thereof. When a stray field in a direction perpendicular to a recording medium is applied, the effect of the magnetic field is alleviated by the magnetic field shield installed in the vicinity of the main pole. In such a case, it need only be sufficient to form the magnetic field shield in a shape optimum for removing the stray field in the perpendicular direction only. When a stray field in a direction horizontal in relation to the recording medium is applied, the magnetic field acting on the recording medium is removed by the cover of the device comprising a magnetic component.

公开(公告)号：US06243824B1

公开(公告)日：2001-06-05

申请号：US08355210

申请日：1994-12-09

申请人： Hitoshi Kakuta ,  Yoshihisa Kamo ,  Hajime Aoi

发明人： Hitoshi Kakuta ,  Yoshihisa Kamo ,  Hajime Aoi

IPC分类号： H02H305

CPC分类号： G06F11/1076 ,  G06F3/0601 ,  G06F11/1466 ,  G06F2003/0692 ,  G06F2211/109

摘要： An array disk subsystem including a command selector for separating a signal from a host into a data item and a command, a data dividing unit for subdividing the data item, an ECC generator for producing an ECC for each of the obtained subdata items, a group of data disks for respectively storing thereon the subdata items and the ECCs, a command interpreting unit for interpreting the command, an I/O counter for counting I/O commands in the command, a backup processor for requesting a backup command based on count information of the I/O counter, and a backup unit responsive to the backup command for sequentially reading the subdata items and the ECCs from the data disks to record therein the subdata items and the ECCs.

摘要翻译： 一种阵列磁盘子系统，包括用于将信号从主机分离为数据项和命令的命令选择器，用于细分数据项的数据划分单元，用于为每个所获得的子数据项产生ECC的ECC产生器， 用于分别存储子数据项和ECC的数据磁盘，用于解释命令的命令解释单元，用于对命令中的I / O命令进行计数的I / O计数器，用于根据计数信息请求备份命令的备份处理器 的I / O计数器，以及响应于备份命令的备份单元，用于从数据盘顺序读取子数据项和ECC，以在其中记录子数据项和ECC。

公开(公告)号：US6161194A

公开(公告)日：2000-12-12

申请号：US162444

申请日：1998-09-29

申请人： Atsushi Tanaka ,  Yoshihisa Kamo ,  Hitoshi Kakuta

发明人： Atsushi Tanaka ,  Yoshihisa Kamo ,  Hitoshi Kakuta

IPC分类号： G06F3/06 ,  G06F11/00 ,  G06F11/10 ,  G11B20/18 ,  G11C29/00

CPC分类号： G11C29/74 ,  G06F11/1084 ,  G06F11/1092

摘要： A storage data reconstruction system including a plurality of storage units for storing therein divided data, the plural independent storage units forming a set; units for storing therein ECC data corresponding to the divided data; a spare storage unit for storing therein reconstructed data; an I/O-reconstruction control circuit; a timer; a data reconstructing table for a storage unit which has failed and a circuit for reconstructing faulty data. When a failure occurs in any of the storage units, the failure is detected by an error check, a state of the failure is discriminated, a preferred processing suitable for the state of the failure is selected from a processing of a normal access or read/write, and a data reconstruction processing, and the selected processing is carried out, or the frequency of the processing of the normal access or read/write and the data reconstruction processing, or the ratio of the amount of the data reconstruction processing within a unit time, is set. The time taken to reconstruct the faulty data does not exceed a fixed period of time.

摘要翻译： 一种存储数据重建系统，包括：多个存储单元，用于在其中存储划分的数据，所述多个独立存储单元形成一组; 用于存储与分割数据相对应的ECC数据的单元; 用于存储重建数据的备用存储单元; I / O重构控制电路; 一个计时器 用于存储单元的故障的数据重建表和用于重建故障数据的电路。 当在任何存储单元中发生故障时，通过错误检查来检测到故障，判别出故障状态，从正常访问或读/写操作的处理中选择适合于故障状态的优选处理， 写入和数据重建处理，并且执行所选择的处理，或正常访问或读/写和数据重构处理的处理频率，或单位内的数据重构处理量的比率 时间，设置。 重建故障数据所用的时间不超过固定的时间段。

公开(公告)号：US06145091A

公开(公告)日：2000-11-07

申请号：US259408

申请日：1999-02-22

申请人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Kouji Arai ,  Yoshihisa Kamo

发明人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Kouji Arai ,  Yoshihisa Kamo

IPC分类号： G06F3/06 ,  G06F11/10 ,  G06F12/08 ,  G06F12/16 ,  G06F13/10 ,  G06F11/00

CPC分类号： G06F11/1076 ,  G06F2211/1009

摘要： When receiving a write request from a processor, a control unit checks the condition of existence (or the presence/absence) in a cache for information necessary for generation of an updated value of a parity record, receives write data and reports the completion of the write request to the processor. In asynchronism with the write request from the processor, the control unit performs a load process for that information among the information necessary for generation of the updated value of the parity record which may be prepared in asynchronism with the write request from the processor and a write after process for the updated value of the parity record.

公开(公告)号：US5574881A

公开(公告)日：1996-11-12

申请号：US511779

申请日：1995-08-10

申请人： Hiroshi Yasuoka ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshihisa Kamo ,  Hiromichi Fujisawa ,  Zenji Tsutsumi ,  Shunichi Torii

发明人： Hiroshi Yasuoka ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Yoshihisa Kamo ,  Hiromichi Fujisawa ,  Zenji Tsutsumi ,  Shunichi Torii

IPC分类号： G11B25/04 ,  G06F3/06 ,  G06F12/00 ,  G11B7/00 ,  G11B7/004 ,  G11B19/20 ,  G11B21/00 ,  G11B27/10 ,  G11B27/36 ,  G06F13/00 ,  G06F12/12 ,  G11B17/22

CPC分类号： G11B19/20 ,  G06F3/0601 ,  G11B21/00 ,  G11B27/105 ,  G11B5/5578 ,  G06F2003/0692 ,  G11B2220/20 ,  G11B2220/41 ,  G11B27/36

摘要： A fast access high capacity data storage system and method are disclosed, the data storage system including a disk-based storage system employing a plurality of storage surfaces. Selected storage surfaces have a plurality of independently controlled data access heads in data communication therewith, and circuitry is provided for allowing concurrent data transfers through the plurality of data access heads. Performance is further improved by monitoring frequently accessed data records and transferring them to a copy recording surface or recording surfaces less frequently used, and by moving a data access head of the plurality of data access heads to other recording surfaces to decrease access bottlenecks. The storage system further includes circuitry for averaging at least one of record length data, transfer timing data, access timing data and address data.

摘要翻译： 公开了一种快速访问高容量数据存储系统和方法，该数据存储系统包括采用多个存储表面的基于盘的存储系统。 所选择的存储表面具有与其数据通信的多个独立控制的数据访问头，并且提供电路以允许通过多个数据访问头并发数据传输。 通过监视频繁访问的数据记录并将其传送到复制记录表面或不太频繁使用的记录表面，并通过将多个数据访问头的数据访问头移动到其他记录表面来减少访问瓶颈，进一步提高了性能。 存储系统还包括用于平均记录长度数据，传送定时数据，访问定时数据和地址数据中的至少一个的电路。

公开(公告)号：US4600965A

公开(公告)日：1986-07-15

申请号：US580711

申请日：1984-02-16

申请人： Naoki Sato ,  Yoshihisa Kamo ,  Yasuhiro Katoh ,  Kazuhiro Momata ,  Shinichi Arai

发明人： Naoki Sato ,  Yoshihisa Kamo ,  Yasuhiro Katoh ,  Kazuhiro Momata ,  Shinichi Arai

IPC分类号： G11B5/02 ,  G11B5/09 ,  H03K17/60 ,  H03K17/66 ,  G05F3/22 ,  H01H47/32

CPC分类号： H03K17/603 ,  G11B5/02 ,  H03K17/667

摘要： In a current driving circuit which supplies a two-terminal load with current to be inverted in accordance with input information, a current driving circuit according to the present invention comprises a load whose one-side terminal has its potential fixed, circuitry to supply a non-fixed side terminal of the load with a direct current, and circuitry to supply the non-fixed side terminal with a current having a magnitude double that of the direct current and a polarity opposite to that of the direct current, while switching it in accordance with input information. Owing to such construction, the number of terminals to be led out from the loads can be reduced, and a load current can be inverted at high speed. In addition, reliability can be enhanced because the assembling process is simplified.

摘要翻译： 在根据输入信息向两端负载提供要反相的电流的电流驱动电路中，根据本发明的电流驱动电路包括其一侧端子具有其电位固定的电路， 具有直流电的负载的固定侧端子，以及用于向非固定侧端子提供具有与直流电流相反的直流电压和极性两倍的电流的电流的电路，同时根据 与输入信息。 由于这样的结构，可以减少从负载引出的端子的数量，并且可以高速地反转负载电流。 此外，由于组装过程简化，可以提高可靠性。

公开(公告)号：US07242656B2

公开(公告)日：2007-07-10

申请号：US10617681

申请日：2003-07-14

申请人： Yoshihisa Kamo ,  Hitoshi Kakuta ,  Atsushi Tanaka ,  Yosuke Seo

发明人： Yoshihisa Kamo ,  Hitoshi Kakuta ,  Atsushi Tanaka ,  Yosuke Seo

IPC分类号： G11B7/00

CPC分类号： G06F1/266 ,  G11B19/209

摘要： With respect to the disk drives provided power from a single power source in a disk drive system, start up power is first supplied to a first start-up group of the disks, preferably comprising all of the master disks, with the size of the group being selected so that the required current does not exceed the capacity of the power source. When the disk drives of the first group have substantially reached steady state, start-up is conducted with respect to a second start-up group of the disk drives so that the current required during start-up for the second group and the current required for steady state drive of the first start-up group does not exceed the capacity of the power source. With respect to each start-up group, the number of disk drives is the maximum integer value and decreases or remains the same with respect to subsequent start-up groups. When simultaneously transferring subdivided data in parallel to all of the disk drives of a parity group, respectively, seek operations in such a system are prevented from occurring simultaneously by offsetting the indices on the disks, by varying the seek operation start timing or by varying the head addresses for the start of reading and writing, all within one revolution, but the seek operations are ended at the same time, to reduce peak current requirements of the power source.

摘要翻译： 对于提供来自磁盘驱动器系统中的单个电源的电力的磁盘驱动器，首先将启动电力提供给具有组的大小的优选地包括所有主盘的磁盘的第一启动组 被选择使得所需电流不超过电源的容量。 当第一组的磁盘驱动器已经基本上达到稳定状态时，相对于磁盘驱动器的第二启动组进行启动，使得第二组启动期间所需的电流以及第二组所需的电流 第一启动组的稳态驱动不超过电源的容量。 对于每个启动组，磁盘驱动器的数量是最大整数值，并且相对于后续的启动组而言减少或保持不变。 当分别同时将分割的数据传送到奇偶校验组的所有磁盘驱动器时，通过改变寻道操作开始定时或通过改变寻道操作开始时间来防止这种系统中的寻找操作同时发生， 开始阅读和写入的头地址全部在一轮之内，但寻道操作同时结束，以减少电源的峰值电流要求。

公开(公告)号：US20050050267A1

公开(公告)日：2005-03-03

申请号：US10945882

申请日：2004-09-22

申请人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Kouji Arai ,  Yoshihisa Kamo

发明人： Akira Yamamoto ,  Hiroyuki Kitajima ,  Kouji Arai ,  Yoshihisa Kamo

IPC分类号： G06F11/10 ,  G06F12/16

CPC分类号： G06F11/1076 ,  G06F2211/1009

摘要： When receiving a write request from a processor, a control unit checks the condition of existence (or the presence/absence) in a cache for information necessary for generation of an updated value of a parity record, receives write data and reports the completion of the write request to the processor. In asynchronism with the write request from the processor, the control unit performs a load process for that information among the information necessary for generation of the updated value of the parity record which may be prepared in asynchronism with the write request from the processor and a write after process for the updated value of the parity record.

公开(公告)号：US06625690B2

公开(公告)日：2003-09-23

申请号：US10122301

申请日：2002-04-16

申请人： Yoshihisa Kamo ,  Hitoshi Kakuta ,  Atsushi Tanaka ,  Yosuke Seo

发明人： Yoshihisa Kamo ,  Hitoshi Kakuta ,  Atsushi Tanaka ,  Yosuke Seo

IPC分类号： G06F1200

CPC分类号： G06F1/266 ,  G11B19/209

摘要： With respect to the disk drives provided power from a single power source in a disk drive system, start up power is first supplied to a first start-up group of the disks, preferably comprising all of the master disks, with the size of the group being selected so that the required current does not exceed the capacity of the power source. When the disk drives of the first group have substantially reached steady state, start-up is conducted with respect to a second start-up group of the disk drives so that the current required during start-up for the second group and the current required for steady state drive of the first start-up group does not exceed the capacity of the power source. With respect to each start-up group, the number of disk drives is the maximum integer value and decreases or remains the same with respect to subsequent start-up groups. When simultaneously transferring subdivided data in parallel to all of the disk drives of a parity group, respectively, seek operations in such a system are prevented from occurring simultaneously by offsetting the indices on the disks, by varying the seek operation start timing or by varying the head addresses for the start of reading and writing, all within one revolution, but the seek operations are ended at the same time, to reduce peak current requirements of the power source.