Method and apparatus to distinguish effects of adjacent track encroachment from head thermal movement
AssigneeSamsung Electronics Co., Ltd.
InventorsZhaohui Li, Geng Wang, Keung Youn Cho
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Abstract
The present invention is a method and system to determine a quality of a head in a hard disk drive. The method comprises providing a disk having a at least one side with a plurality of tracks, writing on a predetermined track on the plurality of tracks and reading a profile of the predetermined track to provide a first profile value. The head is then moved to an adjacent track where it writes on the adjacent track. A profile of the predetermined track is then read to provide a second profile value. A quality of the head can then be determined based on the first and second values.
Claims20
A method for determining a quality of a head in a hard disk drive, comprising:
- a) providing a disk having a at least one side with a plurality of tracks;
- b) writing on a predetermined track on said plurality of tracks;
- c) reading a profile of said predetermined track to provide a first profile value;
- d) moving to a track adjacent to said predetermined track;
- e) writing on said adjacent track;
- f) reading a profile of said predetermined track to provide a second profile value;
- and
- d) determining a quality value of said head based on said first and second values.
A system to determine a quality of a head in a hard disk drive, comprising:
- a housing;
- a spin motor mounted to said housing;
- an actuator arm mounted to said spin motor;
- a disk attached to said spin motor, said disk having at least one side with a plurality of tracks;
- a memory to store instruction sequences;
- a processor coupled to said memory;
- a read/write head mounted to said actuator arm to write on and read from said at least one side of said disk, said read/write head coupled to said processor, wherein said processor executes said instruction sequences to
- a) providing a disk having a at least one side with a plurality of tracks;
- b) writing on a predetermined track on said plurality of tracks;
- c) reading a profile of said predetermined track to provide a first profile value;
- d) moving to a track adjacent to said predetermined track;
- e) writing on said adjacent track;
- f) reading a profile of said predetermined track to provide a second profile value;
- and
- g) determining a quality value of said head based on said first and second values.
Dependencies are inferred from the claim text.