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US 11,646,057 B2Granted
Estimating recording head fly height using machine learning
AssigneeSeagate Technology LLC
InventorsZheng Wang, Ara Patapoutian, Timothy F. Ellis, Jason Bellorado, William M. Radich
Life of this patent
Estimating the term…
Abstract
Two or more data values are received from one or more sensors of a hard disk drive. The two or more data values are indicative of a fly height of a recording head of the hard disk drive. The two or more data values are input into a machine-learning processor during operation of the hard disk drive. A fly height of the recording head during the operation of the hard drive head is adjusted based on an output of the machine learning processor.
Claims18
A method, comprising:
- receiving two or more data values from one or more sensors of a hard disk drive, the two or more data values indicative of a fly height of a recording head of the hard disk drive;
- inputting the two or more data values into a machine learning processor during operation of the hard disk drive, wherein the machine learning processor provides two or more outputs indicative of two or more probabilities that the fly height is respectively within two or more different ranges;
- and
- adjusting the fly height of the recording head during the operation of the hard disk drive based on an output of the machine learning processor.
1 more element
A method, comprising:
- receiving two or more data values from one or more sensors of a hard disk drive, the two or more data values indicative of a fly height of a recording head of the hard disk drive;
- inputting the two or more data values into a machine learning processor during operation of the hard disk drive, wherein the two or more data values comprise an indicator of a radial zone in which the recording head is located, the radial zone indicative of a bit density of data read by the recording head;
- adjusting the fly height of the recording head during the operation of the hard disk drive based on an output of the machine learning processor.
A method, comprising:
- measuring at least one of a servo address mark signal and an automatic gain control signal to determine a first data value indicative of fly height of a recording head over a disk surface of a hard disk drive;
- determining a second data value indicative of the fly height based on an indicator of a radial position of the recording head over the disk surface;
- inputting the first and second data values into a machine learning processor during operation of the hard disk drive;
- and
- adjusting the fly height of the recording head during the operation of the hard disk drive based on an output of the machine learning processor.
2 more elements
Dependencies are inferred from the claim text.