Patent ID: 9431056
Filing Date: 2016-08-30
CPC Classification: G11B

Claim Text:
1. A method for replacing at least one defective section on a disk surface without using sector slipping and spare sectors, comprising: a) providing a plurality of tracks configured for shingled magnetic recording at least in an area of said disk surface, the tracks being grouped into bands by means of entire tracks designated as circular guard regions, b) determining that at least one defective section is located on a track in a first band, c) selecting the preceding guard region at least if said defective section is located in the upper half of said first band, d) selecting the succeeding guard region at least if said defective section is located in the lower half of said first band, e) displacing at least the selected guard region onto the physical location of said defective section, wherein the entire circular guard region is displaced in the radial direction of said disk surface such that the radius of the circular guard region is changed, f) converting the former physical location of said selected guard region into one or more newly constituted tracks and integrating said one or more newly constituted tracks into the regular tracks of a second band that is adjacent to said first band, g) storing data at least on said one or more newly constituted tracks.