Data storage device modifying write operation when a laser mode hop is detected
First Claim
1. A data storage device comprising:
- a first disk surface;
a first head actuated over the first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface; and
control circuitry configured to;
apply a write power to the laser and execute a first write operation to write first data to the first disk surface during a first revolution of the first disk surface;
detect a first transient decrease in an output power of the laser during the first write operation; and
when the first transient decrease in the output power of the laser is detected during the first write operation, execute a write-verify of the first data during a second revolution of the first disk surface.
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Accused Products
Abstract
A data storage device is disclosed comprising a first head actuated over a first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface. A write power is applied to the laser and a first write operation is executed to write first data to the first disk surface during a first revolution of the first disk surface. A first transient decrease in an output power of the laser is detected during the first write operation, and when the first transient decrease in the output power of the laser is detected during the first write operation, a write-verify of the first data is executed during a second revolution of the first disk surface.
502 Citations
16 Claims
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1. A data storage device comprising:
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a first disk surface; a first head actuated over the first disk surface, wherein the first head comprises a laser configured to heat the first disk surface while writing data to the first disk surface; and control circuitry configured to; apply a write power to the laser and execute a first write operation to write first data to the first disk surface during a first revolution of the first disk surface; detect a first transient decrease in an output power of the laser during the first write operation; and when the first transient decrease in the output power of the laser is detected during the first write operation, execute a write-verify of the first data during a second revolution of the first disk surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of operating a data storage device, the method comprising:
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applying a write power to a laser of a first head and executing a first write operation to write first data to a first disk surface during a first revolution of the first disk surface, wherein the laser is configured to heat the first disk surface while writing data to the first disk surface; detecting a first transient decrease in an output power of the laser during the first write operation; and when the first transient decrease in the output power of the laser is detected during the first write operation, executing a write-verify of the first data during a second revolution of the first disk surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification