Disk drive apparatus having shock adaptive filters
AssigneeKabushiki Kaisha Toshiba
InventorBrian K. Tanner
Life of this patent
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Abstract
According to one embodiment, a disk drive apparatus includes a sensor to detect mechanical shocks to the disk drive apparatus and to provide a shock output signal representative of such mechanical shocks, a first filter coupled to the sensor to filter the shock output signal to pass signals having a first frequency component, a second filter to independently filter the shock output signal to provide signals having a second frequency component, a detector to inhibit write operations of the disk drive apparatus responsive to the shock output signal from the first filter, and a controller coupled to the second filter to compensate for low frequency mechanical disturbances during write operations to a track on the disk drive apparatus responsive to low frequency component.
Claims20
A disk drive apparatus comprising:
- a sensor to detect mechanical shocks to the disk drive apparatus and to provide a shock output signal representative of such mechanical shocks;
- a first filter coupled to the sensor to filter the shock output signal to pass signals having a first frequency component;
- a second filter to independently filter the shock output signal to provide signals having a second frequency component;
- a detector to inhibit write operations of the disk drive apparatus responsive to the shock output signal from the first filter;
- and
- a controller coupled to the second filter to compensate for low frequency mechanical disturbances during write operations to a track on the disk drive apparatus responsive to low frequency component.
A method comprising:
- detecting mechanical shocks to a disk drive to provide a shock output signal representative of such mechanical shocks;
- filtering the shock output signal using a first filter that filters the shock output signal to provide signals having a first frequency component;
- filtering the shock output signal using a second filter which is independent of the first filter to provide signals having a second frequency component;
- inhibiting write operations of the disk drive responsive to the first frequency component of the shock output signal;
- and
- compensating for low frequency mechanical disturbances during writing to a track on the disk drive responsive to the second frequency components of the shock output signal.
A disk drive apparatus comprising:
- means for detecting mechanical shocks to the disk drive apparatus to provide a shock output signal representative of such mechanical shocks;
- first means, coupled to the detecting means, for filtering the shock output signal to pass signals having a first frequency component;
- second means, coupled to the detecting means in parallel with the first filtering means, for filtering the shock output signal to pass signals having a second frequency component;
- means for inhibiting write operations of the disk drive apparatus responsive to the shock output signal passed through the first filtering means;
- and
- means for compensating for low frequency mechanical disturbances during write operations to a track on the disk drive apparatus responsive to the shock output signal passed through the second filtering means.
Dependencies are inferred from the claim text.