Identifying a defect in a data-storage medium
AssigneeSTMicroelectronics S.r.l.
InventorsSHAYAN SRINIVASA GARANI, SIVAGNANAM PARTHASARATHY
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Abstract
An embodiment of a data-read path includes a defect detector and a data-recovery circuit. The defect detector is operable to identify a defective region of a data-storage medium, and the data-recovery circuit is operable to recover data from the data-storage medium in response to the defect detector. For example, such an embodiment may allow identifying a defective region of a data-storage disk caused, e.g., by a scratch or contamination, and may allow recovering data that was written to the defective region.
Claims22
1-42. (canceled)
A data read path, comprising:
- a defect detector configured to identify a defective region of a data-storage medium by at least
- determining a level of channel-detector values generated in response to the defective region, and
- identifying the defective region in response to the level;
- and
- a data recovery circuit configured to recover data from the data-storage medium in response to the defect detector.
A media drive comprising:
- a data-storage medium configured to store data;
- and
- a media-drive controller comprising a data-write path configured to write data to the data-storage medium, and a data read path comprising
- a defect detector configured to identify a defective region of a data-storage medium by at least determining a level of channel-detector values generated in response to the defective region and identifying the defective region in response to the level, and
- a data recovery circuit configure to recover data from the data-storage medium in response to the defect detector.
A method comprising:
- identifying a defective region of a data-storage medium by at least determining a level of channel-detector values generated in response to the defective region, and identifying the defective region in response to the level;
- and
- recovering data from the data-storage medium in response to the defect detector.
A method comprising:
- identifying a defective region of a data-storage medium;
- recovering a first data element from the identified defective region;
- recovering a second data element from another region of the data-storage medium that is not identified as being defective;
- generating a first reliability value corresponding to the first data element in a first manner;
- and
- generating second reliability value corresponding to the second data element in a second manner that is different from the first manner.
Dependencies are inferred from the claim text.