公开(公告)号：US07080306B1

公开(公告)日：2006-07-18

申请号：US09511931

申请日：2000-02-24

申请人： Takayuki Sugawara ,  Hiroki Hirashima ,  Isao Asano ,  Kyoichi Shirane

发明人： Takayuki Sugawara ,  Hiroki Hirashima ,  Isao Asano ,  Kyoichi Shirane

IPC分类号： G11B20/18

CPC分类号： G11B20/1803

摘要： A disk device for performing error-correction processing is loaded with a high-reliability disk to which a C1 code as a low-level error-correction code (ECC) is added for every sector, and a C2 code as a high-level ECC is added for every plurality of sectors. A host computer includes a device driver corresponding to the high-reliability disk. When data written to the high-reliability disk is read, low-level error-correction is performed based on the C1 code in units of one block corresponding to one sector, and the corrected data is notified to the host computer. Simultaneously, the C2 code along with the data for a plurality of blocks is loaded, and high-level error correction based on the C2 code is thereby performed.

摘要翻译： 用于进行纠错处理的盘装置装载有高可靠性盘，作为低级错误校正码（ECC）的C1码被添加到每个扇区，并且C2码作为高级ECC 为每个多个扇区添加。 主计算机包括对应于高可靠性盘的设备驱动器。 当读取写入高可靠性磁盘的数据时，以对应于一个扇区的一个块为单位的C1代码执行低级错误校正，并将校正后的数据通知给主计算机。 同时，C2代码与多个块的数据一起被加载，由此执行基于C2代码的高级错误校正。

公开(公告)号：US06724552B1

公开(公告)日：2004-04-20

申请号：US09416654

申请日：1999-10-12

申请人： Takayuki Sugawara ,  Takahiro Kawauchi ,  Masahiro Tenpaku ,  Yoshiyasu Kubota

发明人： Takayuki Sugawara ,  Takahiro Kawauchi ,  Masahiro Tenpaku ,  Yoshiyasu Kubota

IPC分类号： G11B509

CPC分类号： G11B20/1217 ,  G11B20/1816 ,  G11B27/3027 ,  G11B2020/1281 ,  G11B2020/1476 ,  G11B2020/1826

摘要： A magnetic disk apparatus is capable of reading normal data following a read error of a reference signal that has occurred due to a scratch or the like on a disk surface. In the magnetic disk apparatus, if a reference signal (STM) fails to be read at point P, then an elapsed time (Tw) is measured, and a time T2 indicating the difference between a time T1 at which a read gate is supposed to be opened and the time Tw is determined. The read gate is opened after the time T2 has passed, thereby making it possible to properly read data and subject the read data to a decoding process.

摘要翻译： 磁盘装置能够在由于盘表面上的划痕等而发生的参考信号的读取错误之后读取正常数据。 在磁盘装置中，如果在点P处不能读取参考信号（STM），则测量经过时间（Tw），并且指示读取门被假定为的时间T1之间的差的时间T2 打开并确定时间Tw。 在时间T2过去之后，读门被打开，从而可以适当地读取数据并对读取的数据进行解码处理。

公开(公告)号：US06545832B1

公开(公告)日：2003-04-08

申请号：US09416040

申请日：1999-10-12

申请人： Takayuki Sugawara ,  Takahiro Kawauchi ,  Kazuya Seta

发明人： Takayuki Sugawara ,  Takahiro Kawauchi ,  Kazuya Seta

IPC分类号： G11B509

CPC分类号： G11B27/36 ,  G11B20/10009 ,  G11B20/18 ,  G11B20/1883 ,  G11B20/1889 ,  G11B2220/20

摘要： A parameter value is set in a register. A signal is read based on the parameter value. When an error is recognized from an MSE value calculated by a Viterbi decoder, the parameter value is changed and the signal is reread. A new parameter value is calculated based on a change value by which the parameter value is changed and the MSE value. The new parameter value is stored in the register. Thus, an error rate can be converged as a result of the retry.

摘要翻译： 在寄存器中设置参数值。 基于参数值读取信号。 当从维特比解码器计算的MSE值识别出错误时，改变参数值并重新读取信号。 根据参数值改变的变化值和MSE值计算新的参数值。 新参数值存储在寄存器中。 因此，作为重试的结果，可以收敛错误率。

公开(公告)号：US5966259A

公开(公告)日：1999-10-12

申请号：US852669

申请日：1997-05-07

申请人： Tetsuya Mitsuishi ,  Masayoshi Nakagawa ,  Makoto Moriya ,  Takayuki Sugawara ,  Katsuji Suzuki

发明人： Tetsuya Mitsuishi ,  Masayoshi Nakagawa ,  Makoto Moriya ,  Takayuki Sugawara ,  Katsuji Suzuki

IPC分类号： G11B5/09 ,  G11B5/00 ,  G11B5/012 ,  G11B5/016 ,  G11B5/55 ,  G11B5/596 ,  G11B5/74 ,  G11B5/82 ,  G11B20/00 ,  G11B20/12 ,  G11B27/00

CPC分类号： G11B5/74 ,  G11B20/1251 ,  G11B5/00 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/59633 ,  G11B5/59655 ,  G11B5/82 ,  G11B5/825 ,  G11B20/00086 ,  G11B2020/1259 ,  G11B5/016

摘要： The present invention relates to a magnetic recording medium and a magnetic recording/reproducing apparatus for the same. In the magnetic recording medium there are provided a read/write region which permits modification of written data and a read-only region dedicated to the reading of data, which is used for reading only once writing is done. In recording servo information to a data format region of the magnetic recording medium, the time width of servo information in the read-only region is set shorter than that in the read/write region.

摘要翻译： 磁记录介质及其磁记录/重放装置技术领域本发明涉及一种磁记录介质及其用于磁记录/再现装置。 在磁记录介质中，提供了允许修改写入数据的读/写区域和专用于数据读取的只读区域，该区域仅在写入完成时用于读取。 在将伺服信息记录到磁记录介质的数据格式区域中，将只读区域中的伺服信息的时间宽度设置为比读/写区域中的时间宽。

公开(公告)号：US06515816B1

公开(公告)日：2003-02-04

申请号：US09265231

申请日：1999-03-08

申请人： Hiroshi Wakuda ,  Shigeru Yamaguchi ,  Takayuki Sugawara

发明人： Hiroshi Wakuda ,  Shigeru Yamaguchi ,  Takayuki Sugawara

IPC分类号： G11B1518

CPC分类号： G11B19/125 ,  G11B20/1217 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/2512

摘要： The radius range of a formatted zone in each medium differs. A floppy disk and an another-standard high-capacity medium are distinguished by reading a reproduction output at an inside position in the formatted zone by heads. Since the another-standard high-capacity medium has a formatted zone starting from a more inside position than that for the floppy disk, both media can be distinguished by reading a reproduction output by the heads to check a difference in the inside position of the formatted zone.

摘要翻译： 每个介质中格式化区域的半径范围不同。 通过读头在格式化区域的内部位置读取再现输出来区分软盘和另一标准大容量介质。 由于另一标准大容量介质具有从比软盘的内部位置开始的格式化区域，所以可以通过读取头的再现输出来区分两个介质以检查格式化的内部位置的差异 区。

公开(公告)号：US06483789B1

公开(公告)日：2002-11-19

申请号：US09470355

申请日：1999-12-22

申请人： Yoshiyasu Kubota ,  Takayuki Sugawara ,  Takahiro Kawauchi

发明人： Yoshiyasu Kubota ,  Takayuki Sugawara ,  Takahiro Kawauchi

IPC分类号： G11B509

CPC分类号： G11B20/1883 ,  G11B5/012

摘要： A method for detecting a defective sector on a recording medium in a method for recording and/or reproducing data for the signal recording medium. A read gate is opened to reproduce data from a data field at a pre-set timing derived from a timing reference signal obtained on detecting a servo timing mark recorded in a servo field. If the timing reference signal has not been detected with success, the read gate is opened at a timing obtained based on a detection signal of a previously detected servo timing mark to reproduce the data from the data field. In detecting the defective sector, the state of deviation between the timing of opening the read gate and the data field is detected to detect the defective sector of the disc.

摘要翻译： 一种用于在用于记录和/或再现用于信号记录介质的数据的方法中的用于检测记录介质上的缺陷扇区的方法。 一个读门被打开，以从在检测到伺服字段中记录的伺服定时标记获得的定时参考信号得到的预定定时从数据字段再现数据。 如果定时参考信号未成功检测到，则读门在基于先前检测到的伺服定时标记的检测信号获得的定时被打开，以从数据场再现数据。 在检测到缺陷扇区时，检测打开读取门的时间与数据场之间的偏差状态，以检测盘的缺陷扇区。

公开(公告)号：US06223321B1

公开(公告)日：2001-04-24

申请号：US09129496

申请日：1998-08-05

申请人： Masahiro Nasu ,  Takayuki Sugawara

发明人： Masahiro Nasu ,  Takayuki Sugawara

IPC分类号： G11B2018

CPC分类号： H03M13/1515 ,  G11B20/1833 ,  H03M13/29 ,  H03M13/2909

摘要： A recording/reproduction device includes a reading mechanism to read information data stored in a floppy disk and constituted by a plurality of byte data and first inspection data and second inspection data to detect an error of the information data. First and second calculation mechanism calculate a first and second syndrome value from the byte data and the first and second inspection data, respectively. First and second error correction mechanisms perform error correction for the information data on the basis of the first and second syndrome value, respectively. A computer includes the second error correction mechanism. Because the second error correction is not performed in the floppy disk drive, the capacity of a storage unit is decreased, a memory in the floppy disk drive can be considerably smaller than that of a conventional floppy disk drive, and the cost of the floppy disk drive can be reduced. In addition, since secondary correction is not performed in the floppy disk drive, an increase in data transfer rate from the floppy disk drive to the computer can be realized.

摘要翻译： 记录/再现装置包括读取机构，用于读取存储在软盘中并由多个字节数据和第一检查数据构成的信息数据和第二检查数据，以检测信息数据的错误。 第一和第二计算机构分别从字节数据和第一和第二检查数据计算第一和第二校正值。 第一和第二纠错机构分别基于第一和第二综合征值对信息数据进行纠错。 计算机包括第二纠错机构。 由于在软盘驱动器中不执行第二纠错，所以存储单元的容量降低，软盘驱动器中的存储器可以比常规软盘驱动器的存储器小得多，并且软盘的成本 驱动可以减少。 此外，由于在软盘驱动器中不执行二次校正，因此可以实现从软盘驱动器到计算机的数据传输速率的增加。