07898762 is referenced by 120 patents and cites 27 patents.

A disk drive is disclosed comprising a head actuated over a disk, the disk including a plurality of servo sectors wherein each servo sector comprises at least one servo burst. A read signal emanating from the head is sampled while reading a servo burst in a servo sector to generate a plurality of sample values. A quality metric is generated in response to a plurality of sample values of a servo sub-burst representing part of the servo burst. When the quality metric does not exceed a threshold, the servo sub-burst sample values are excluded when generating a position error signal (PES) representing a position of the head over the disk. When the quality metric exceeds the threshold, the servo sub-burst sample values are included when generating the PES. The head is then positioned over the disk in response to the PES.

Title
Disk drive excluding servo sub-bursts when computing position error signal
Application Number
12/582863
Publication Number
7898762 (B1)
Application Date
October 21, 2009
Publication Date
March 1, 2011
Inventor
Jie Yu
Irvine
CA, US
Abhishek Dhanda
Mission Viejo
CA, US
Guoxiao Guo
Foothill Ranch
CA, US
Assignee
Western Digital Technologies
CA, US
IPC
G11B 5/596
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