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US 5,764,430 AGranted
Disk drive having optimized spindle speed for environment
AssigneeInternational Business Machines Corporation
InventorsHal Hjalmar Ottesen, Gordon J. Smith
Life of this patent
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Abstract
A disk storage device in which two or more discrete disk velocities are used is disclosed. The disk velocity is selected using operating environmental conditions. Various types of sensors may be used to detect the environmental conditions or the environmental conditions may be input by a user. The allocation of track locations on a disk into zones reduces the number of zone bit frequencies the storage device must handle when multiple frequency zones are used in connection with the various spindle speeds.
Claims8
A memory storage device, comprising:
- a storage medium for storing data;
- a motor connected to the storage medium to selectively rotate the storage medium at a plurality of discrete operational velocities;
- a transducer mounted to access the storage medium at each of the plurality of discrete velocities;
- a control unit, coupled to receive an environment signal indicative of an environment in which the memory storage device is operating, the control unit providing a control signal to the motor indicative of one of the plurality of discrete operational velocities based on the environment signal;
- and
- a data channel coupled to the transducer, the data channel configured to read and write data at a number of different frequencies, each of the different frequencies corresponding to a respective one of the discrete operational velocities.
3 more elements
Dependencies are inferred from the claim text.