Write encroachment mitigation system
AssigneeSeagate Technology LLC
InventorQuinn J. Haddock
Life of this patent
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Abstract
The disclosed technology provides for a method and system comprising determining a write-encroachment threshold of a recording medium as a percentage of cross-track width of tracks in the recording medium, determining a track as off-track based on a position error signal level for the track exceeding the write-encroachment threshold, flagging one or more tracks substantially near the off-track, and writing write data for the one or more flagged tracks to a media cache. In a recovery process, the write data can be later transferred back to the flagged tracks.
Claims20
A method comprising:
- determining a write-encroachment threshold (WET) of a recording medium as a percentage of cross-track width of tracks in the recording medium;
- determining a track as off-track and one or more tracks substantially near the off-track as unwriteable based on a position error signal (PES) level for the track exceeding the WET;
- flagging the one or more tracks substantially near the off-track track;
- and
- writing write data for the one or more flagged tracks to a media cache.
A storage device system, comprising:
- a memory configured to store data on data tracks;
- and
- a processor configured to determine a write-encroachment threshold (WET) of a recording medium as a percentage of cross-track width of tracks in the recording medium, determine a track as off-track and one or more tracks substantially near the off-track as unwriteable based on a position error signal (PES) level for the track exceeding the WET, flag the one or more tracks substantially near the off-track track, and write write data for the one or more flagged tracks to a media cache.
A method comprising:
- determining a write-encroachment threshold (WET) of a recording medium as a percentage of cross-track width of tracks in the recording medium;
- determining a track as off-track and one or more tracks substantially near the off-track as unwriteable based on a position error signal (PES) level for the track exceeding the WET;
- flagging the one or more tracks substantially near the off-track track;
- writing write data for the one or more flagged tracks to a media cache;
- recovering the write data from the media cache during idle time;
- and
- writing the recovered write data to the flagged tracks.
Dependencies are inferred from the claim text.