The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Oct. 10, 2007
Peter Raymond, Erie, CO (US);
Peter Raymond, Erie, CO (US);
ESGW Holdings Limited, Tortola, VG;
Abstract
A method for operating a fixed media hard disk drive using a plurality of disks on each of which the ratio of servo track pitch to data track pitch is smoothly varied across the surface of the disk as data is being written. The method allows the density of data on each disk to be independently varied, the total data capacity of a disk to be independently varied and introduces a degree of flexibility into the process of testing disk formatting. The method includes the use of a smooth and continuous function having a set of adjustable parameters, by whose definition a relationship between the two pitches is established within the data band. The method can also be applied to disks that are divided into radial zones to take advantage of additional properties of data writing and reading within a hard disk drive.