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1.发明授权Method and apparatus for determining set value of write current of magnetic head 有权用于确定磁头写入电流设定值的方法和装置公开(公告)号：US07982991B2
公开(公告)日：2011-07-19
申请号：US11807044
申请日：2007-05-24
IPC分类号： G11B5/09
CPC分类号： G11B5/5565 , G11B5/012
摘要： Embodiments of the present invention help to efficiently determine the appropriate setting of the write current of a magnetic head relative to temperature. According to one embodiment, a test computer determines the set value of a write current as a function of temperature for each head device portion from the relationship between a write current and an error rate. A test execution controller sets a selected head device portion and a write current to an AE, and writes data on a magnetic disk using the components in a HDD. The test execution controller reads the written data, and the error rate of the data from an error correcting section. The test execution controller repeats the same process with the write current varied. Upon completion of the measurement at the preset write currents, the test execution controller transfers the measurement data to the test computer.
摘要翻译： 本发明的实施例有助于有效地确定磁头相对于温度的写入电流的适当设置。 根据一个实施例，测试计算机根据写入电流和错误率之间的关系，确定作为每个磁头装置部分的温度的函数的写入电流的设定值。 测试执行控制器将所选择的头部设备部分和写入电流设置为AE，并使用HDD中的组件将数据写入磁盘。 测试执行控制器从错误校正部分读取写入的数据和数据的错误率。 测试执行控制器重复相同的过程，写入电流变化。 在预设写入电流完成测量后，测试执行控制器将测量数据传送到测试计算机。
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2.发明申请Method and appartus for determining set value of write current of magnetic head 有权用于确定磁头写入电流设定值的方法和程序公开(公告)号：US20070273993A1
公开(公告)日：2007-11-29
申请号：US11807044
申请日：2007-05-24
IPC分类号： G11B27/36
CPC分类号： G11B5/5565 , G11B5/012
摘要： Embodiments of the present invention help to efficiently determine the appropriate setting of the write current of a magnetic head relative to temperature. According to one embodiment, a test computer determines the set value of a write current as a function of temperature for each head device portion from the relationship between a write current and an error rate. A test execution controller sets a selected head device portion and a write current to an AE, and writes data on a magnetic disk using the components in a HDD. The test execution controller reads the written data, and the error rate of the data from an error correcting section. The test execution controller repeats the same process with the write current varied. Upon completion of the measurement at the preset write currents, the test execution controller transfers the measurement data to the test computer.
摘要翻译： 本发明的实施例有助于有效地确定磁头相对于温度的写入电流的适当设置。 根据一个实施例，测试计算机根据写入电流和错误率之间的关系，确定作为每个磁头装置部分的温度的函数的写入电流的设定值。 测试执行控制器将所选择的头部设备部分和写入电流设置为AE，并使用HDD中的组件将数据写入磁盘。 测试执行控制器从错误校正部分读取写入的数据和数据的错误率。 测试执行控制器重复相同的过程，写入电流变化。 在预设写入电流完成测量后，测试执行控制器将测量数据传送到测试计算机。
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公开(公告)号：US20060012906A1
公开(公告)日：2006-01-19
申请号：US11179205
申请日：2005-07-11
IPC分类号： G11B5/09
CPC分类号： G11B20/1833 , G11B20/18 , G11B20/1816
摘要： Embodiments of the present invention provide an inspection method for detecting a physical defect of a magnetic disk with high sensitivity without increasing the length of inspection time. In a magnetic disk drive according to one embodiment, the assembling of which has been completed, by reading inspection data written to a magnetic disk, a defect of the magnetic disk is detected in a state in which a read error occurs. Redundant bits of an ECC are added to the inspection data. If a head corresponding to a recording surface to be inspected has superior read performance, an ECC 2 is applied. If the head in question has inferior read performance, an ECC 4 is applied. Accordingly, as compared with a case where a single ECC is applied, the defect detectivity is further improved without increasing the length of inspection time.
摘要翻译： 本发明的实施例提供一种用于在不增加检查时间的情况下高灵敏度地检测磁盘的物理缺陷的检查方法。 在根据一个实施例的磁盘驱动器中，通过读取写入磁盘的检查数据，组装已经完成，在发生读取错误的状态下检测到磁盘的缺陷。 将ECC的冗余位添加到检查数据。 如果与要检查的记录表面相对应的磁头具有优异的读取性能，则应用ECC 2。 如果所涉及的头部具有较差的读取性能，则应用ECC 4。 因此，与应用单个ECC的情况相比，在不增加检查时间的长度的情况下，进一步提高缺陷检测性。
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公开(公告)号：US07417816B2
公开(公告)日：2008-08-26
申请号：US11179205
申请日：2005-07-11
IPC分类号： G11B5/09
CPC分类号： G11B20/1833 , G11B20/18 , G11B20/1816
摘要： Embodiments of the present invention provide an inspection method for detecting a physical defect of a magnetic disk with high sensitivity without increasing the length of inspection time. In a magnetic disk drive according to one embodiment, the assembling of which has been completed, by reading inspection data written to a magnetic disk, a defect of the magnetic disk is detected in a state in which a read error occurs. Redundant bits of an ECC are added to the inspection data. If a head corresponding to a recording surface to be inspected has superior read performance, an ECC 2 is applied. If the head in question has inferior read performance, an ECC 4 is applied. Accordingly, as compared with a case where a single ECC is applied, the defect detectivity is further improved without increasing the length of inspection time.
摘要翻译： 本发明的实施例提供一种用于在不增加检查时间的情况下高灵敏度地检测磁盘的物理缺陷的检查方法。 在根据一个实施例的磁盘驱动器中，通过读取写入磁盘的检查数据，组装已经完成，在发生读取错误的状态下检测到磁盘的缺陷。 将ECC的冗余位添加到检查数据。 如果与要检查的记录表面相对应的磁头具有优异的读取性能，则应用ECC 2。 如果所涉及的头部具有较差的读取性能，则应用ECC 4。 因此，与应用单个ECC的情况相比，在不增加检查时间的长度的情况下，进一步提高缺陷检测性。
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