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US 2017/0206926 A1Published application
Systems and Methods for Missed Media Sector Alignment
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsYuqing Yang, Shaohua Yang
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Abstract
Systems and methods relating generally to data processing, and more particularly to adjusting gain parameters in relation to data processing.
Claims20
A data processing system, the system comprising:
- a first sync mark detector circuit operable to apply a first sync mark detection algorithm to search a received media sector and overhead for a second sync mark after a failure to identify a first sync mark, wherein the received media sector includes a first fragment set corresponding to a first codeword, a second fragment set corresponding to a second codeword, and wherein the first fragment set is shuffled with the second fragment set to yield an intermixed fragment set;
- a second sync mark detector circuit operable to apply a second sync mark detection algorithm to search the received media sector and overhead for the second sync mark, wherein the second sync mark detection algorithm is more robust than the first sync mark detection algorithm;
- an anchor point identification circuit operable to identify an anchor point in the received media sector;
- a retry controller circuit operable to cause a re-read of the media sector and overhead when the first sync mark detector circuit fails to identify the first sync mark, and to align the media sector to a forced sync mark at a location calculated based upon a first location of the anchor point and a second location of the second sync mark to yield an aligned media sector;
- and
- a data processing circuit operable to recover an original user data set from the aligned media sector.
3 more elements
A method for data processing, the method comprising:
- receiving a media sector including a first fragment set corresponding to a first codeword, a second fragment set corresponding to a second codeword, wherein the first fragment set is shuffled with the second fragment set to yield an intermixed fragment set;
- failing to identify both a first sync mark and a second sync mark associated with the media sector;
- identifying an anchor point within the media sector at an anchor location;
- using a sync mark identification circuit to re-identify the second sync mark at a second sync mark location, wherein the second sync mark location is selected from a group consisting of:
- an actual location where the second sync mark was identified, and another likely location of the second sync mark;
- using the anchor location and the second sync mark location to calculate a first sync mark location;
- re-reading the entire media sector from the storage medium to yield a re-read media sector, and aligning the entire re-read media sector to the first sync mark location to yield an aligned media sector;
- and
- processing the aligned media sector using a data detector circuit and a data decoder circuit to yield user data, wherein the user data was originally encoded to yield the first codeword and the second codeword.
6 more elements
Dependencies are inferred from the claim text.