Disc device, disk formatting method, and disk formatting apparatus
AssigneeFujitsu Limited
InventorsYoshihiko Nakamura, Takeshi Hara
Life of this patent
Estimating the term…
Abstract
A disk device includes a plurality of recording surfaces each of which having a recording area for recording data. An area or a width in a radial direction of an effective area set to be capable of recording the data in the recording area on at least one of the recording surfaces is different from that in the recording area on other of the recording surfaces.
Claims12
A disk device comprising:
- a plurality of recording surfaces each of which having a recording area for recording data, wherein
- an area or a width in a radial direction of an effective area set to be capable of recording the data in the recording area on at least one of the recording surfaces is different from that in the recording area on other of the recording surfaces.
A disk formatting method for a disk device including a plurality of recording surfaces each of which having a recording area for recording data and a plurality of heads that performs reading or writing of the data on the recording surfaces, the disk formatting method comprising:
- measuring a positioning accuracy of each of the for each of the recording surfaces;
- determining an effective area for recording the data for each of the heads based on a result of measurement of the positioning accuracy at the measuring;
- and
- executing formatting of a recording surface corresponding to each of the heads for the effective area determined for each of the heads.
A disk formatting apparatus for a disk device including a plurality of recording surfaces each of which having a recording area for recording data and a plurality of heads that performs reading or writing of the data on the recording surfaces, the disk formatting apparatus comprising:
- a positioning-accuracy measuring unit that measures a positioning accuracy of each of the for each of the recording surfaces;
- an effective-area determining unit that determines an effective area for recording the data for each of the heads based on a result of measurement of the positioning accuracy by the positioning-accuracy measuring unit;
- and
- a format executing unit that executes formatting of a recording surface corresponding to each of the heads for the effective area determined for each of the heads.
Dependencies are inferred from the claim text.