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US 10,482,918 B1Granted
Changing bit spacing for selected symbols written to a magnetic recording medium
AssigneeSeagate Technology LLC
InventorsMehmet Fatih Erden, Stephanie Hernandez, Steven Douglas Granz
Life of this patent
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Abstract
A set of patterns written to a magnetic recording medium are found that result in a relatively high and/or low error when read back. Upon writing subsequent to the determining of the set of patterns, one pattern of the set of the patterns is identified within a data segment ready to be written to the magnetic recording medium. The data segment is written with a changed bit spacing in response to identifying that the one pattern of the set of the patterns is within the data segment.
Claims20
A method, comprising:
- writing a plurality of different symbols to a magnetic recording medium at a nominal bit timing;
- determining a first set of the symbols that result in a relatively high error when read back;
- upon writing subsequent to the determining of the first set of symbols, identifying one symbol of the first, set of symbols within a data segment ready to be mitten to the magnetic recording medium;
- and
- writing the data segment with increased bit spacing relative to the nominal bit timing in response to identifying that the one symbol of the first set of symbols is within the data segment.
2 more elements
A method, comprising:
- writing a plurality of different symbols to a magnetic recording medium at a nominal bit timing;
- determining a set of the symbols that result in a relatively low error when read back;
- upon writing subsequent to the determining of the set of symbols, identify one symbol of the set of the symbols within a data segment ready to be written to the magnetic recording medium;
- and
- write the data segment with decreased bit spacing relative to the nominal bit timing in response to identifying that the one symbol of the set of the symbol is within the data segment.
2 more elements
An apparatus, comprising:
- interface circuitry coupled to a head that reads from and writes to a magnetic recording medium;
- and
- a controller coupled to the interface circuitry and operable to:
- determine a set of symbols written to the magnetic recording medium that result in one of a relatively high error or relatively low error when read back;
- upon writing subsequent to the determining of the set of symbols, identify one symbol of the set of the symbols within a data segment ready to be written to the magnetic recording medium;
- and
- write the data segment with a changed bit spacing in response to identifying that the one symbol of the set of the symbols is within the data segment.
4 more elements
Dependencies are inferred from the claim text.