Magnetic disk drive
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTakuji Matsuzawa
Life of this patent
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Abstract
According to one embodiment, a magnetic disk drive includes rotatable disks, heads, microactuators, a voice coil motor (VCM), and a control system, wherein the control system determines a final set of heads of target for simultaneously positioned on their respective target tracks from among the heads, by using at least a displacement amount of the microactuators, determines a target position of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, switches a controller of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, and switches controller of the microactuators included in each of the heads in the final set.
Claims8
A magnetic disk drive, comprising:
- a plurality of rotatable disks, each of the disks being a magnetic recording medium;
- a plurality of heads, each of the heads being capable of independently performing simultaneous read and write of data for a certain position of the plurality of disks;
- a plurality of microactuators, one or more of the microactuators being included in each of the plurality of heads and all of the microactuators being capable of driving independently;
- a voice coil motor (VCM) that moves the plurality of heads to a predetermined position on the disk;
- a simultaneous on-track head determination unit determining a final set of heads which are to be simultaneously positioned on their respective target tracks from among the plurality of heads is determined, by using at least a displacement amount of the plurality of microactuators;
- a VCM target position determination unit determining a target position of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks;
- a VCM control switching unit switching a controller of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks;
- and
- a microactuator control switching unit switching controllers of the microactuators included in each of the heads in the final set determined by the simultaneous on-track head determination unit.
Dependencies are inferred from the claim text.