US 2008/0291576 A1 · CONTROLLER, STORAGE APPARATUS AND CONTROL METHOD

Abstract

A controller controls movement of a head mounted in a storage apparatus based on a signal output from an acceleration sensor. A head movement control section which controls movement of the head to a target position on a storage medium and a head unload control section unloads the head to an unload position based on (1) the time at which a drop or initial impact is first detected based on a signal output from the acceleration sensor and (2) threshold information, which includes a first threshold representing a standard strength of the signal output from the acceleration sensor at the time of drop and a second threshold representing a standard strength of the signal output from the acceleration sensor at the time of initially receiving impact.

Claims12

Dependent claims

A controller for controlling movement of a head mounted in a storage apparatus based on a signal output from an acceleration sensor, comprising:

a head movement control section which controls movement of the head to a target position on a storage medium;
and
a head unload control section which unloads the head to an unload position based on (1) time starting from a time point at which an initial drop or impact is first detected based on a signal output from the acceleration sensor, and (2) threshold information, which includes a first threshold representing a strength of the signal output from the acceleration sensor at the time of drop and a second threshold representing strength of the signal output from the acceleration sensor at the time of receiving initial impact.

A storage apparatus which controls movement of a head based on a signal output from an acceleration sensor, comprising:

a threshold information storage section which stores a first threshold representing signal output from the acceleration sensor that indicates a drop and a second threshold representing a signal output from the acceleration sensor that indicates receiving impact as threshold information;
and
a head control section which unloads the head to an unload position based on time starting when drop or impact is first detected based on the signal output from the acceleration sensor and the threshold information.

An unload control method for controlling movement of a head mounted to a storage apparatus based on a signal output from an acceleration sensor, comprising:

an acquiring step of acquiring threshold information including a first threshold representing strength of a signal output from the acceleration sensor that indicates a drop and a second threshold representing strength of a signal output from the acceleration sensor at the time of receiving an initial impact;
and
a head control step of unloading the head to an unload position based on time starting from a time point at which drop or initial impact is first detected based on the signal output from the acceleration sensor and the threshold information.

Dependencies are inferred from the claim text.

Controller, storage apparatus and control method

Life of this patent

Controller, storage apparatus and control method

Life of this patent

Abstract

Claims12