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US 12,230,305 B2Granted
Magnetic disk device having heater to adjust spacing between magnetic disk and magnetic head
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorMasayuki Kondo
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a magnetic disk device which supplies, at the time of startup of data write or startup of data read, electric power higher than steady electric power used to make, in advance, spacing between a magnetic disk and a magnetic head become saturated at a target value to a heater of the magnetic head for a specified time and, after an elapse of the specified time, gradually reduces the electric power to be supplied to the heater of the magnetic head to the steady electric power.
Claims10
A magnetic disk device comprising:
- a magnetic disk;
- a magnetic head including a write element used to write data to the magnetic disk, a read element used to read data from the magnetic disk, and further including a heater which generates heat by electric power supplied thereto and expands the magnetic head toward the magnetic disk side;
- and
- a controller which supplies, at the time of startup of data write, fixed additional electric power for an initial first time of a specified time while supplying steady electric power to the heater for the specified time, and supplies gradually-decreasing additional electric power for a remaining second time of the specified time, the steady electric power being used to make spacing between the magnetic disk and the magnetic head become saturated at a target value.
1 more element
A magnetic disk device comprising:
- a magnetic disk;
- a magnetic head including a write element used to write data to the magnetic disk, a read element used to read data from the magnetic disk, and further including a heater which generates heat by electric power to be supplied thereto and expands the magnetic head toward the magnetic disk side;
- and
- a controller which supplies, at the time of startup of data read, fixed additional electric power for an initial first time of a specified time while supplying steady electric power to the heater for the specified time, and supplies gradually-decreasing additional electric power for a remaining second time of the specified time, the steady electric power being used to make spacing between the magnetic disk and the magnetic head become saturated at a target value.
1 more element
Dependencies are inferred from the claim text.