G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 5/588 (2006.01) G11B 15/18 (2006.01) G11B 15/20 (2006.01) G11B 15/467 (2006.01)
Patent
CA 2080592
2080592 9116704 PCTABS00008 A helical system (10) reads tracks (18) on a storage medium (12), including distorted tracks. Each track (18) comprises a plurality of blocks, with each block having unique block-identifying information. A servo system (84) causes a head (16C) to traverse predetermined original azimuthal paths (P0) across the medium (12) for reading the blocks recorded along each of the original path (P0). A controller (50) uses the block-identifying information to determine whether any blocks expected to be read during traversal of the original path (P0) were not read. If expected blocks were not read, the controller (50) repositions the medium (12) and directs that the medium (12) be re-read with the head (16C) offset until the expected blocks are actually read. During the re-read attempts, the read head (16C) is positionally offset to traverse modified azimuthal paths (P1, P2, P3, ... P10).
Georgis Steven Philip
Pisciotta Christopher
Exabyte Corporation
Kirby Eades Gale Baker
LandOfFree
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