Defining a maximum sequential write duration for a data storage device utilizing heat-assisted recording
AssigneeSeagate Technology LLC
InventorsAlfredo Sam Chu, Wenzhong Zhu
Life of this patent
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Abstract
A maximum write duration is determined for first and second heat-assisted write transducers of a data storage device. Exceeding the duration results in thermal degradation of the first and second write transducers. A request to write data to a heat-assisted recording medium is received. In response to a time to fulfill the request exceeding the maximum write duration, the data is divided into portions such that a respective writing of each of the portions does not exceed the maximum write duration. Writing successive ones of the portions to the heat-assisted recording medium involves alternating between the first and second write transducers.
Claims21
A method comprising:
- determining a maximum write duration for first and second heat-assisted write transducers of a data storage device before thermal degradation of the first and second write transducers occur;
- receiving a request to write data to a heat-assisted recording medium;
- in response to a time to fulfill the request exceeding the maximum write duration, dividing the data into portions such that a respective writing of each of the portions does not exceed the maximum write duration;
- alternating between the first and second write transducers when writing successive ones of the portions to the heat-assisted recording medium.
An apparatus, comprising:
- a controller configured to write to a heat-assisted recording medium via first and second heat-assisted write transducers, the controller configured to:
- determine a maximum write duration before thermal degradation of the first and second write transducers occur;
- receive a request to write data to the heat-assisted recording medium;
- in response to a time to fulfill the request exceeding the maximum write duration, divide the data into portions such that a respective writing of each of the portions does not exceed the maximum write duration;
- alternate between the first and second write transducers when writing successive ones of the portions to the heat-assisted recording medium.
(canceled)
A method comprising:
- mapping logical block addresses of a data storage device to sectors of a heat-assisted recording medium such that writing to a contiguous range of the logical block addresses results in a laser of a heat-assisted recording write transducer being energized for no more than a maximum write duration to reduce thermal degradation of the write transducer;
- and
- using the mapping when writing sequential data to the heat-assisted recording medium via the write transducer.
Dependencies are inferred from the claim text.