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1. 发明授权

US08223448B1 Disk drive calibrating preamp for servo sectors and data sectors 有权
标题翻译：伺服扇区和数据扇区的磁盘驱动器校准前置放大器
公开(公告)号：US08223448B1
公开(公告)日：2012-07-17
申请号：US12765553
申请日：2010-04-22
申请人： Kwok Foong Haw , Jame Show Leiong Hii
发明人： Kwok Foong Haw , Jame Show Leiong Hii
IPC分类号： G11B5/09 , G11B21/02
CPC分类号： G11B5/5534 , G11B5/09 , G11B5/59622 , G11B20/10009 , G11B20/10388
摘要： A disk drive is disclosed comprising a head actuated over a disk including a plurality of tracks defined by servo sectors, wherein each track comprises a plurality of data sectors. The disk drive further comprises a preamp circuit operable to amplify a read signal emanating from the head to generate a pre-amplified read signal. A first gain setting of the preamp circuit is calibrated in response to a plurality of the servo sectors, and the first gain setting is adjusted in response to a plurality of the data sectors.
摘要翻译：公开了一种磁盘驱动器，包括在包括由伺服扇区定义的多个磁道的磁盘上启动的磁头，其中每个磁道包括多个数据扇区。磁盘驱动器还包括前置放大器电路，其可操作以放大从头发出的读取信号以产生预放大的读取信号。响应于多个伺服扇区校准前置放大器电路的第一增益设置，并且响应于多个数据扇区来调整第一增益设置。

2. 发明授权

US08537480B1 Hard drive testing 有权
标题翻译：硬盘测试
公开(公告)号：US08537480B1
公开(公告)日：2013-09-17
申请号：US12953095
申请日：2010-11-23
申请人： Kwok Foong Haw
发明人： Kwok Foong Haw
IPC分类号： G11B27/36 , G11B5/09
CPC分类号： G11B27/36 , G11B19/048 , G11B20/1816 , G11B2220/2516
摘要： A method for testing a hard drive includes determining a first partial bit error rate (PBERT) value of a hard drive at a first temperature and a second PBERT value of the hard drive at a second temperature. The method includes determining a PBERT minimum based on the first and second PBERT values, and comparing the PBERT minimum to a first PBERT minimum limit. The method includes determining a PBERT ratio based on the first and second PBERT values if the PBERT minimum is greater than or equal to the first PBERT minimum limit. The method includes comparing the PBERT ratio to a PBERT ratio limit, and comparing the PBERT minimum to a second PBERT minimum limit if the PBERT ratio is greater than the PBERT ratio limit. The method includes generating a failure indicator if the PBERT minimum is less than the first and/or second PBERT minimum limit.
摘要翻译：用于测试硬盘驱动器的方法包括在第二温度下确定硬盘驱动器的第一温度的第一部分位错误率（PBERT）值和硬盘驱动器的第二PBERT值。该方法包括基于第一和第二PBERT值来确定PBERT最小值，以及将PBERT最小值与第一PBERT最小限度进行比较。该方法包括如果PBERT最小值大于或等于第一PBERT最小限度，则基于第一和第二PBERT值来确定PBERT比率。该方法包括将PBERT比率与PBERT比率限制进行比较，如果PBERT比率大于PBERT比率限制，则将PBERT最小值与第二PBERT最小值进行比较。如果PBERT最小值小于第一和/或第二PBERT最小限度，则该方法包括产生故障指示符。

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