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公开(公告)号：US07023633B2
公开(公告)日：2006-04-04
申请号：US10355474
申请日：2003-01-31
CPC分类号： G11B5/59633
摘要： A system and process for constructing a magnetic storage drive capable of single pass self-servowriting. A plurality of heads are sorted, or “binned,” into classifications based on at least an approximate magnetic width of each head. Only heads from a single classification are installed in a particular disk drive system. A track overlap value is calculated, preferably empirically, for the approximate magnetic widths of typical heads in the single classification. The overlap value is used to determine a track spacing utilized during a self-servowriting process.
摘要翻译： 一种用于构建能够进行单程自伺服驱动的磁存储驱动器的系统和过程。 多个头部至少基于每个头部的近似磁性宽度被分类或分类成分类。 只有单个分类的头才安装在特定的磁盘驱动器系统中。 对于单个分类中的典型磁头的近似磁宽，优选经验地计算磁道重叠值。 重叠值用于确定在自伺服驱动过程中使用的磁道间隔。
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公开(公告)号：US06335840B1
公开(公告)日：2002-01-01
申请号：US09188836
申请日：1998-11-09
申请人： Daniel James Malone
发明人： Daniel James Malone
IPC分类号： G11B502
CPC分类号： G11B5/59622 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/59683 , G11B19/04
摘要： A direct access storage device (DASD) servo control system controls movement of a magneto-resistive (MR) read/write head in response to a readback signal generated when the MR head repeatedly passes adjacent multiple servo fields and data fields of the recording medium. The servo control system receives multiple data samples, detects a thermal asperity in the readback signal when the MR transducer is adjacent a servo field of the recording medium, determines that the servo field data samples affected by the thermal asperity are invalid due to possible data errors, and operates a servo demodulator in response to the servo field thermal asperity before the MR transducer is next adjacent the servo field. In a DASD with a rotating disk, for example, the thermal asperity response can be implemented before one revolution of the disk has been completed after the thermal asperity is encountered. This permits data samples that have been corrupted by the thermal asperity to be ignored from servo processing, thereby reducing the uncertainty in the servo information being processed. If desired, the response can be implemented before the next servo sector is encountered. In this way, the DASD more effectively utilizes storage system resources and, in particular, handles thermal asperities more efficiently.
摘要翻译： 直接访问存储设备（DASD）伺服控制系统响应于当MR磁头重复通过相邻的多个伺服磁场和记录介质的数据区域时产生的回读信号来控制磁阻（MR）读/写磁头的移动。 伺服控制系统接收多个数据样本，当MR传感器与记录介质的伺服磁道相邻时，检测回读信号中的热不均匀性，确定受热不均匀影响的伺服磁场数据样本由于可能的数据错误而无效 并且在MR传感器邻近伺服磁场之前响应伺服磁场热粗糙度操作伺服解调器。 例如，在具有旋转盘的DASD中，可以在遇到热凹凸之后完成盘的一圈之前实现热凹凸响应。 这允许从伺服处理中忽略被热不平坦破坏的数据样本，从而减少正在处理的伺服信息的不确定性。 如果需要，可以在遇到下一个伺服扇区之前实现响应。 以这种方式，DASD更有效地利用存储系统资源，特别是更有效地处理热凹凸。
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公开(公告)号：US06950265B2
公开(公告)日：2005-09-27
申请号：US10272401
申请日：2002-10-16
CPC分类号： G11B5/59627 , G11B5/5556 , G11B5/59633 , G11B20/18 , G11B27/3027 , G11B2220/2516
摘要： A system and method for managing servo defects in a data storage device. During operation of the device, a servo sector recorded on a medium is identified. A lookup is performed in a servo defect table resource to determine whether the servo sector contains defective servo information. A responsive servo control action is taken if the servo sector is found to contain defective servo information. Media having servo defect information recorded thereon are also disclosed.
摘要翻译： 一种用于管理数据存储装置中的伺服缺陷的系统和方法。 在设备的操作期间，识别记录在介质上的伺服扇区。 在伺服缺陷表资源中执行查找以确定伺服扇区是否包含有缺陷的伺服信息。 如果发现伺服扇区包含有缺陷的伺服信息，则执行响应伺服控制动作。 还公开了其上记录有伺服缺陷信息的介质。
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公开(公告)号：US5940233A
公开(公告)日：1999-08-17
申请号：US782206
申请日：1997-01-10
CPC分类号： G11B20/10055 , G11B20/1403 , G11B20/1813 , G11B27/3027 , G11B20/12 , G11B2020/1476 , G11B2020/148 , G11B2220/20
摘要： The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a redundant sync byte, or group of sync bytes, is provided in the AGC field preceding the primary sync region. Upon failure to detect the primary sync byte, an attempt is made on a subsequent revolution to read the secondary sync byte, either by holding the AGC gain prior to reaching the data block, or initiating an "early read" just prior to reaching the data block. In a second embodiment of the invention, the redundant sync byte is provided within the data field subsequent to the primary sync region. On failing to detect the primary sync byte, the secondary sync byte can be read immediately or can be postponed until a subsequent revolution. The missed first data region is reconstructed using ECC information. In third and fourth alternative embodiments, a secondary sync byte is provided either between the primary sync byte and the start of data or between the primary sync byte and AGC field.
摘要翻译： 本发明提供了一种系统，方法和数据格式，其中在数据扇区中以足够的距离提供冗余同步字节或同步字节组，以便在多字节缺陷的情况下将冗余同步字节与主同步字节隔离。 在第一实施例中，在主同步区域之前的AGC场中提供冗余同步字节或同步字节组。 在无法检测到主同步字节时，尝试通过在到达数据块之前保持AGC增益或在达到数据之前启动“早期读取”，在随后的转动中读取辅助同步字节 块。 在本发明的第二实施例中，在主同步区域之后的数据字段内提供冗余同步字节。 在无法检测到主同步字节时，可以立即读取辅助同步字节，或者可以推迟继续转换。 使用ECC信息重建错过的第一数据区域。 在第三和第四替代实施例中，在主同步字节和数据开始之间或在主同步字节和AGC字段之间提供辅同步字节。
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公开(公告)号：US06583943B2
公开(公告)日：2003-06-24
申请号：US10131158
申请日：2002-04-23
IPC分类号： C11B509
CPC分类号： G11B20/10055 , G11B20/12 , G11B20/1403 , G11B20/1813 , G11B27/3027 , G11B2020/1476 , G11B2020/148 , G11B2220/20
摘要： The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a redundant sync byte, or group of sync bytes, is provided in the AGC field preceding the primary sync region. Upon failure to detect the primary sync byte, an attempt is made on a subsequent revolution to read the secondary sync byte, either by holding the AGC gain prior to reaching the data block, or initiating an “early read” just prior to reaching the data block. In a second embodiment of the invention, the redundant sync byte is provided within the data field subsequent to the primary sync region. On failing to detect the primary sync byte, the secondary sync byte can be read immediately or can be postponed until a subsequent revolution. The missed first data region is reconstructed using ECC information. In third and fourth alternative embodiments, a secondary sync byte is provided either between the primary sync byte and the start of data or between the primary sync byte and AGC field.
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6.发明授权公开(公告)号：US06392830B1
公开(公告)日：2002-05-21
申请号：US09638087
申请日：2000-08-11
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B20/12 , G11B20/1403 , G11B20/1813 , G11B27/3027 , G11B2020/1476 , G11B2020/148 , G11B2220/20
摘要： The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a redundant sync byte, or group of sync bytes, is provided in the AGC field preceding the primary sync region. Upon failure to detect the primary sync byte, an attempt is made on a subsequent revolution to read the secondary sync byte, either by holding the AGC gain prior to reaching the data block, or initiating an “early read” just prior to reaching the data block. In a second embodiment of the invention, the redundant sync byte is provided within the data field subsequent to the primary sync region. On failing to detect the primary sync byte, the secondary sync byte can be read immediately or can be postponed until a subsequent revolution. The missed first data region is reconstructed using ECC information. In third and fourth alternative embodiments, a secondary sync byte is provided either between the primary sync byte and the start of data or between the primary sync byte and AGC field.
摘要翻译： 本发明提供了一种系统，方法和数据格式，其中在数据扇区中以足够的距离提供冗余同步字节或同步字节组，以便在多字节缺陷的情况下将冗余同步字节与主同步字节隔离。 在第一实施例中，在主同步区域之前的AGC场中提供冗余同步字节或同步字节组。 在无法检测到主同步字节时，尝试通过在到达数据块之前保持AGC增益或在达到数据之前启动“早期读取”，在随后的转动中读取辅助同步字节 块。 在本发明的第二实施例中，在主同步区域之后的数据字段内提供冗余同步字节。 在无法检测到主同步字节时，可以立即读取辅助同步字节，或者可以推迟继续转换。 使用ECC信息重建错过的第一数据区域。 在第三和第四替代实施例中，在主同步字节和数据开始之间或在主同步字节和AGC字段之间提供辅同步字节。
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7.发明授权公开(公告)号：US06181497B2
公开(公告)日：2001-01-30
申请号：US08570878
申请日：1995-12-12
IPC分类号： G11B2102
CPC分类号： G11B20/10055 , G11B20/12 , G11B20/1403 , G11B20/1813 , G11B27/3027 , G11B2020/1476 , G11B2020/148 , G11B2220/20
摘要： The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a redundant sync byte, or group of sync bytes, is provided in the AGC field preceding the primary sync region. Upon failure to detect the primary sync byte, an attempt is made on a subsequent revolution to read the secondary sync byte, either by holding the AGC gain prior to reaching the data block, or initiating an “early read” just prior to reaching the data block. In a second embodiment of the invention, the redundant sync byte is provided within the data field subsequent to the primary sync region. On failing to detect the primary sync byte, the secondary sync byte can be read immediately or can be postponed until a subsequent revolution. The missed first data region is reconstructed using ECC information. In third and fourth alternative embodiments, a secondary sync byte is provided either between the primary sync byte and the start of data or between the primary sync byte and AGC field.
摘要翻译： 本发明提供了一种系统，方法和数据格式，其中在数据扇区中以足够的距离提供冗余同步字节或同步字节组，以便在多字节缺陷的情况下将冗余同步字节与主同步字节隔离。 在第一实施例中，在主同步区域之前的AGC场中提供冗余同步字节或同步字节组。 在无法检测到主同步字节时，尝试通过在到达数据块之前保持AGC增益或在达到数据之前启动“早期读取”，在随后的转动中读取辅助同步字节 块。 在本发明的第二实施例中，在主同步区域之后的数据字段内提供冗余同步字节。 在无法检测到主同步字节时，可以立即读取辅助同步字节，或者可以推迟继续转换。 使用ECC信息重建错过的第一数据区域。 在第三和第四替代实施例中，在主同步字节和数据开始之间或在主同步字节和AGC字段之间提供辅同步字节。
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公开(公告)号：US6124994A
公开(公告)日：2000-09-26
申请号：US782207
申请日：1997-01-10
CPC分类号： G11B20/10055 , G11B20/1403 , G11B20/1813 , G11B27/3027 , G11B20/12 , G11B2020/1476 , G11B2020/148 , G11B2220/20
摘要： The present invention provides a system, method and data format wherein a redundant sync byte or group of sync bytes is provided in a data sector at a distance sufficient to isolate the redundant sync byte from the primary sync byte in the event of multiple byte defects. In a first embodiment, a redundant sync byte, or group of sync bytes, is provided in the AGC field preceding the primary sync region. Upon failure to detect the primary sync byte, an attempt is made on a subsequent revolution to read the secondary sync byte, either by holding the AGC gain prior to reaching the data block, or initiating an "early read" just prior to reaching the data block. In a second embodiment of the invention, the redundant sync byte is provided within the data field subsequent to the primary sync region. On failing to detect the primary sync byte, the secondary sync byte can be read immediately or can be postponed until a subsequent revolution. The missed first data region is reconstructed using ECC information. In third and fourth alternative embodiments, a secondary sync byte is provided either between the primary sync byte and the start of data or between the primary sync byte and AGC field.
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9.发明授权Method and system for writing data to a magnetic storage device in a relatively cold or hot environment 失效在相对冷或热的环境中将数据写入磁存储装置的方法和系统公开(公告)号：US06405277B1
公开(公告)日：2002-06-11
申请号：US09187622
申请日：1998-11-06
IPC分类号： G06F1200
CPC分类号： G11B19/04 , G11B5/00 , G11B5/012 , G11B33/14 , G11B33/144 , G11B2005/0002 , G11B2005/001
摘要： A method is described for storing data on a target track of a recordable medium in a storage device via a magnetic write head therein. The storage device has an operating parameter having an operational range with extreme at which the writing of data to said device is prohibited. A first threshold within said range is defined and proximate said first extreme and delimits a first operational subrange. The method including the steps of: monitoring said operating parameter; and determining whether the monitored parameter lies within said first subrange and if so, performing a first predetermined operation to compensate for deleterious effects on data storage caused thereby.
摘要翻译： 描述了一种用于经由其中的磁性写入头将数据存储在存储装置中的可记录介质的目标轨道上的方法。 存储装置具有操作参数，其操作范围为极限，在该操作范围内禁止向所述装置写入数据。 在所述范围内的第一阈值被定义并且接近所述第一极限并限定第一操作子范围。 该方法包括以下步骤：监视所述操作参数; 以及确定所监视的参数是否位于所述第一子范围内，如果是，则执行第一预定操作以补偿由此引起的对数据存储的有害影响。
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