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1. 发明授权

US08896949B1 Disk drive employing general noise whitening filter to reduce length of data dependent noise whitening filters 有权
标题翻译：磁盘驱动器采用通用噪声白化滤波器，减少数据相关噪声白化滤波器的长度
公开(公告)号：US08896949B1
公开(公告)日：2014-11-25
申请号：US13789071
申请日：2013-03-07
申请人： Western Digital Technologies, Inc.
发明人： Patrick J. Lee , Manmohan K. Sharma
IPC分类号： G11B20/10 , G11B20/24
CPC分类号： G11B20/10046
摘要： A disk drive is disclosed comprising a head actuated over a disk, wherein data is read from the disk to generate a read signal. The read signal is sampled to generate signal samples, and the signal samples are filtered with an equalizer filter to generate equalized samples. The equalized samples are filtered with a general noise whitening filter to generate general noise whitened samples. The general noise-whitened samples are filtered with a bank of data dependent noise whitening filters to generate data dependent noise whitened samples, and a data sequence is detected from the data dependent noise whitened samples.
摘要翻译：公开了一种磁盘驱动器，其包括在盘上致动的磁头，其中从盘读取数据以产生读取信号。读取信号被采样以产生信号样本，并且用均衡器滤波器对信号样本进行滤波以产生均衡的采样。用一般的噪声白化滤波器滤除均衡样本，以产生一般噪声白化样品。一般噪声白化样本用一组数据相关噪声白化滤波器进行滤波，以产生数据相关噪声白化样本，并从数据相关噪声白化样本中检测数据序列。

2. 发明授权

US08792196B1 Disk drive estimating noise in a read signal based on an identified response at the input of an equalizer 有权
标题翻译：磁盘驱动器基于在均衡器的输入处识别的响应来估计读取信号中的噪声
公开(公告)号：US08792196B1
公开(公告)日：2014-07-29
申请号：US13789226
申请日：2013-03-07
申请人： Western Digital Technologies, Inc.
发明人： Patrick J. Lee
IPC分类号： G11B20/10
CPC分类号： G11B20/10046
摘要： A disk drive is disclosed comprising a head actuated over a disk, and control circuitry comprising a read channel comprising an analog filter and an equalizer. Data is read from the disk to generate a read signal, and the analog filter filters the read signal. The filtered read signal is sampled, and the read signal samples are input into the equalizer in order to equalize the read signal samples according to a target response. A response of the read channel based on the read signal samples input into the equalizer is identified to generate an identified response. Expected samples are generated based on the identified response, wherein the expected samples correspond to the data written to the disk, and an estimated noise sequence is estimated based on the expected samples and the read signal samples.
摘要翻译：公开了一种磁盘驱动器，其包括在盘上驱动的磁头，以及包括包含模拟滤波器和均衡器的读通道的控制电路。从磁盘读取数据以产生读取信号，模拟滤波器对读取信号进行滤波。对经滤波的读取信号进行采样，并将读取的信号样本输入到均衡器中，以便根据目标响应来均衡读取信号样本。识别基于输入到均衡器中的读取信号样本的读取通道的响应，以产生识别的响应。基于所识别的响应产生预期样本，其中预期样本对应于写入盘的数据，并且基于预期样本和读取信号样本来估计估计噪声序列。

3. 发明授权

US09153287B1 Data access for shingled magnetic recording media 有权
标题翻译：带数字磁记录介质的数据访问
公开(公告)号：US09153287B1
公开(公告)日：2015-10-06
申请号：US13914463
申请日：2013-06-10
申请人： Western Digital Technologies, Inc.
发明人： David M. Hamilton , Patrick J. Lee
IPC分类号： G06F12/00 , G11B27/10
CPC分类号： G11B20/10527 , G11B20/1833 , G11B27/3027 , G11B27/322 , G11B2020/185 , G11B2220/2516
摘要： Methods and apparatus for facilitating pre-read and/or post-read operations of a disk drive. A write command is received including a logical block address (LBA) for user data in the write command. Parity data for correcting the user data is generated by encoding the LBA with the user data. The parity data is written on a disk of the disk drive with the user data so that the LBA can be recovered using the parity data when read from the disk. When a read command is received by the disk drive, requested user data is read from a first sector. User data and parity data is read from a second sector adjacent the first sector. The parity data is used to recover an LBA for the second sector and it is determined whether to store the user data read from the second sector based on the recovered LBA.
摘要翻译：用于促进磁盘驱动器的预读和/或后读操作的方法和装置。接收写命令，包括用于写入命令中的用户数据的逻辑块地址（LBA）。用于校正用户数据的奇偶校验数据是通过用用户数据对LBA进行编码而产生的。奇偶校验数据被写入具有用户数据的磁盘驱动器的磁盘上，使得当从盘读取时可以使用奇偶校验数据恢复LBA。当磁盘驱动器接收到读命令时，从第一扇区读取所请求的用户数据。从与第一扇区相邻的第二扇区读取用户数据和奇偶校验数据。奇偶校验数据用于恢复第二扇区的LBA，并且基于恢复的LBA确定是否存储从第二扇区读取的用户数据。

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