Partial-block off-track data recovery

摘要

Techniques for data recovery from a data block wherein portions of the data block are written at different off-track positions are described. For example, portions of a data block can be read separately for each on-track and off-track position in the data block; then, the separately read portions can be recombined into a recovered data block.

主权项

1. A method comprising: determining that a recorded data block includes at least two portions written at different track positions including at least one portion written at an off-track position; performing a full-block off-track retry technique prior to determining that the data block includes at least two portions written at different off-track positions, wherein determining that the data block includes at least two portions written at different off-track positions does not require reading the data block after performing the full-block off-track retry technique; reading each portion at positions corresponding to the off-track positions of the at least two portions; combining the portions of the data block to form a recovered data block; and outputting the recovered data block to a host device.