System and method for formatting disc surfaces
AssigneeSeagate Technology LLC
InventorsMark A. Gaertner, Mark A. Heath
Life of this patent
Estimating the term…
Abstract
A method formats disc surfaces in a disc drive for storage of data in a group of tracks on the disc surfaces. The disc drive performs seek operations to seek among cylinders on the disc surfaces as a function of time according to an actual seek profile. An approximation of the actual seek profile is determined such that the actual seek profile falls within the approximation. The disc surfaces are formatted according to the approximation of the actual seek profile.
Claims13
A method of formatting disc surfaces in a disc drive for storage of data thereon, the disc surfaces having a plurality of tracks thereon, associated tracks on the disc surfaces forming a cylinder, each cylinder being separated from adjacent cylinders by cylinder boundaries, the data being formed of data chunks, each data chunk to be stored in a group of tracks, the disc drive performing seek operations to seek among the cylinders as a function of time according to an actual seek profile, the method comprising:
- determining an approximation of the actual seek profile such that the seek profile falls within the approximation;
- and
- formatting the disc surfaces according to a step-wise linear approximation of the actual seek profile wherein a height of steps in the step-wise linear approximation correspond to an angular distance between predetermined information portions.
A disc drive, comprising:
- disc surfaces for storage of data thereon, the disc surfaces having a plurality of tracks thereon, associated tracks on the disc surfaces forming a cylinder, each cylinder being separated from adjacent cylinders by cylinder boundaries, the data being formed of data chunks wherein each data chunk is stored in a group of tracks, the disc drive performing seek operations to seek among the cylinders as a function of time according to an actual seek profile;
- and
- a formatter configured to format the disc surfaces by performing a format operation, the format operation including:
- determining an approximation of the actual seek profile such that the seek profile falls within the approximation;
- and
- formatting the disc surfaces according to a step-wise linear approximation of the actual seek profile wherein a height of steps in the step-wise linear approximation correspond to an angular distance between predetermined information portions.
A disc drive, comprising:
- disc surfaces for storage of data thereon, the disc surfaces having a plurality of tracks thereon, associated tracks on the disc surfaces forming a cylinder, each cylinder being separated from adjacent cylinders by cylinder boundaries, the data being formed of data chunks wherein each data chunk is stored in a group of tracks, the disc drive performing seek operations to seek among the cylinders as a function of time according to an actual seek profile;
- and
- a formatter configured to format the disc surfaces by performing a format operation, the format operation including:
- determining an approximation of the actual seek profile such that the seek profile falls within the approximation;
- and
- formatting the disc surfaces according to the approximation accommodating for the data chunks that span spare tracks.
Dependencies are inferred from the claim text.