Method for replacing defective sections on a data carrier with overlapping data tracks and device thereof
First Claim
1. A method for replacing a defective section on a data carrier surface of a storage device configured for overlapping data tracks, comprising placing at least one guard region at least partly onto the physical location of said defective section.
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Accused Products
Abstract
A defect management for storage devices is disclosed, which may be used in connection with shingled magnetic recording (SMR). SMR uses bands, consisting of tracks, separated by guard regions. The replacement of a defective sector may be attained by placing a guard region onto the physical location of the defective sector. Depending on the embodiment, the boundaries of the bands and corresponding guard regions may be shifted. The portion of the disk surface which is necessary for the guard regions may simultaneously function as a spare sector area for defective sectors without additional space requirements. In at least one embodiment, an additional guard region reduces the write amplification, and in other embodiments, guard regions are placed onto tracks with an elevated number of primary defects.
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Citations
25 Claims
- 1. A method for replacing a defective section on a data carrier surface of a storage device configured for overlapping data tracks, comprising placing at least one guard region at least partly onto the physical location of said defective section.
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17. A data carrier surface having an optimized storage capacity, comprising:
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a) a plurality of overlapping data tracks, grouped into bands, b) at least one defective section, c) at least one guard region placed at least partly onto the physical location of said defective section. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A storage device configured for overlapping data tracks, comprising:
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a) at least one data carrier surface, b) a plurality of tracks on each data carrier surface grouped into bands and separated by guard regions, c) an optimized number of tracks for each band, individually for each data carrier surface, such that the guard regions are positioned, as often as possible, on tracks of poor or marginal quality.
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Specification