Magnetic disk drive apparatus and method for compensating characteristics of magnetic disk drive apparatus
AssigneeTDK Corporation
InventorsYosuke Antoku, Hiroki Matsukuma
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Abstract
A magnetic disk drive apparatus includes a magnetic disk with a data region, a magnetic head located in a region of the magnetic disk other than the data region or outside of the magnetic disk before startup of the magnetic disk and loaded on the data region after the startup, and a current supply unit for providing, just after the startup, a dummy write current with a current value lower than a normal write current value to the magnetic head located in the region of the magnetic disk other than the data region or outside of the magnetic disk.
Claims30
A magnetic disk drive apparatus comprising:
- a magnetic disk with a data region;
- a magnetic head located in a region of said magnetic disk other than said data region or outside of said magnetic disk before startup of said magnetic disk and loaded on said data region after the startup;
- and
- a current supply means for providing, just after the startup, a dummy write current with a current value lower than a normal write current value to said magnetic head located in the region of said magnetic disk other than said data region or outside of said magnetic disk.
A mobile phone having a magnetic disk drive apparatus comprising:
- a magnetic disk with a data region;
- a magnetic head located in a region of said magnetic disk other than said data region or outside of said magnetic disk before startup of said magnetic disk and loaded on said data region after the startup;
- and
- a current supply means for providing, just after the startup, a dummy write current with a current value lower than a normal write current value to said magnetic head located in the region of said magnetic disk other than said data region or outside of said magnetic disk.
A vehicle-mounted system having a magnetic disk drive apparatus comprising:
- a magnetic disk with a data region;
- a magnetic head located in a region of said magnetic disk other than said data region or outside of said magnetic disk before startup of said magnetic disk and loaded on said data region after the startup;
- and
- a current supply means for providing, just after the startup, a dummy write current with a current value lower than a normal write current value to said magnetic head located in the region of said magnetic disk other than said data region or outside of said magnetic disk.
A method for compensating characteristics of a magnetic disk drive apparatus having a magnetic disk with a data region and a magnetic head, said method comprising a step of providing, just after a startup of said magnetic disk, a dummy write current with a current value lower than a normal write current value to said magnetic head located in a region of said magnetic disk other than said data region or outside of said magnetic disk.
Dependencies are inferred from the claim text.