Enhanced head skew optimization for high speed disk access
AssigneeSamsung Electronics Co., Ltd.
InventorByeungJun Lee
Life of this patent
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Abstract
A hard disk drive with multiple heads coupled to multiple disks. The disk drive switches between heads when writing or reading data to access different disk surfaces. As described above, there is a head skew time associated with switching heads. The disk drive includes a circuit that switches heads in accordance with a sequence that is a function of a head skew value. For example, the sequence may include switching from a first head to a third head and from a third head to a second head.
Claims11
A hard disk drive, comprising:
- a plurality of disks;
- a plurality of heads coupled to said disks;
- an actuator arm coupled to said heads;
- a voice coil motor coupled to said actuator arm;
- and,
- a circuit that switches between said heads in accordance with a sequence that is a function of a head skew time.
A hard disk drive, comprising:
- a plurality of disks;
- a plurality of heads coupled to said disks;
- an actuator arm coupled to said all the heads;
- a voice coil motor coupled to said actuator arm;
- and,
- circuit means for switching between said heads in accordance with a sequence that is a function of a head skew time.
A method for switching between heads of a hard disk drive, comprising:
- performing a write routine with a head;
- switching to a different head in accordance with a switching sequence that is a function of a head skew time;
- and,
- performing a write routine with the different head.
A method to determine an optimal head switch sequence, comprising;
- providing a plurality of heads coupled to a plurality of disks;
- determining a plurality of skew values for a plurality of head switching sequences;
- and,
- determining at least one optimal head switching sequence.
Dependencies are inferred from the claim text.