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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：US20060139790A1
公开(公告)日：2006-06-29
申请号：US11317193
申请日：2005-12-22
申请人： Kaoru Iseri , Atsushi Tobari , Yasuhiro Iihara , Masanori Aratani
发明人： Kaoru Iseri , Atsushi Tobari , Yasuhiro Iihara , Masanori Aratani
CPC分类号： G11B19/04 , G11B5/5582 , G11B33/08
摘要： Embodiments of the invention avoid an off-track write when an impact is applied. A hard disk drive according to one embodiment of the present invention comprises a magnetic disk; an actuator for moving a head element section over the magnetic disk; and an HDC/MPU for prohibiting the head element section from writing onto the magnetic disk for a short period when a detected impact is found to be greater than a low reference level and not greater than a high reference level, and prohibiting the head element section from writing onto the magnetic disk for a period longer than the short period when the detected impact is found to be greater than the high reference level.
摘要翻译： 当施加冲击时，本发明的实施例避免了偏离写入。 根据本发明的一个实施例的硬盘驱动器包括磁盘; 用于使磁头元件部分移动到磁盘上的致动器; 以及HDC / MPU，用于当发现检测到的冲击大于低基准电平并且不高于高基准电平时，禁止头元件部在短时间内写入磁盘，并且禁止头元件部分 当检测到的冲击被发现大于高参考水平时，从写入磁盘的时间长于短时间段。
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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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公开(公告)号：US07333282B2
公开(公告)日：2008-02-19
申请号：US11317193
申请日：2005-12-22
申请人： Kaoru Iseri , Atsushi Tobari , Yasuhiro Iihara , Masanori Aratani
发明人： Kaoru Iseri , Atsushi Tobari , Yasuhiro Iihara , Masanori Aratani
CPC分类号： G11B19/04 , G11B5/5582 , G11B33/08
摘要： Embodiments of the invention avoid an off-track write when an impact is applied. A hard disk drive according to one embodiment of the present invention comprises a magnetic disk; an actuator for moving a head element section over the magnetic disk; and an HDC/MPU for prohibiting the head element section from writing onto the magnetic disk for a short period when a detected impact is found to be greater than a low reference level and not greater than a high reference level, and prohibiting the head element section from writing onto the magnetic disk for a period longer than the short period when the detected impact is found to be greater than the high reference level.
摘要翻译： 当施加冲击时，本发明的实施例避免了偏离写入。 根据本发明的一个实施例的硬盘驱动器包括磁盘; 用于使磁头元件部分移动到磁盘上的致动器; 以及HDC / MPU，用于当发现检测到的冲击大于低基准电平并且不高于高基准电平时，禁止头元件部在短时间内写入磁盘，并且禁止头元件部分 当检测到的冲击被发现大于高参考水平时，从写入磁盘的时间长于短时间段。
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