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US 10,991,387 B1Granted
Data storage device migrating data from non-energy assist disk surface to energy assist disk surface
AssigneeWestern Digital Technologies, Inc.
InventorsPrakash Balasubramaniam, David R. Hall
Life of this patent
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Abstract
A data storage device is disclosed comprising a non-energy assist (NEA) head configured to access a first disk surface, and an energy assist (EA) head configured to access a second disk surface. The data storage device further comprises control circuitry configured to write data to the first disk surface, and migrate at least part of the data to the second disk surface.
Claims21
A data storage device comprising:
- a first disk surface;
- a non-energy assist (NEA) head configured to access the first disk surface;
- a second disk surface;
- a first energy assist (EA) head configured to access the second disk surface;
- and
- control circuitry configured to:
- write data to the first disk surface;
- migrate at least part of the data to the second disk surface by writing the data to the second disk surface in segments;
- and
- configure a length of each segment to control an operating temperature of the first EA head.
7 more elements
A data storage device comprising:
- a first disk surface;
- a non-energy assist (NEA) head configured to access the first disk surface;
- a second disk surface;
- a first energy assist (EA) head configured to access the second disk surface;
- a third disk surface;
- a second energy assist (EA) head configured to access the third disk surface;
- and
- control circuitry configured to write data to the first disk surface and migrate at least part of the data from the first disk surface to the second and third disk surfaces by at least:
- first writing a first segment of the data to the second disk surface;
- and
- second writing a second segment of the data to the third disk surface.
8 more elements
A data storage device comprising:
- a first disk surface;
- a non-energy assist (NEA) head configured to access the first disk surface;
- a second disk surface;
- a first energy assist (EA) head configured to access the second disk surface;
- a means for writing data to the first disk surface;
- a means for migrating at least part of the data to the second disk surface by writing the data to the second disk surface in segments;
- and
- a means for configuring a length of each segment to control an operating temperature of the first EA head.
5 more elements
A data storage device comprising:
- a first disk surface;
- a non-energy assist (NEA) head configured to access the first disk surface;
- a second disk surface;
- a first energy assist (EA) head configured to access the second disk surface;
- a third disk surface and a second EA head configured to access the third disk surface;
- and
- control circuitry configured to:
- write data to the first disk surface;
- and
- migrate at least part of the data from the first disk surface to the second and third disk surfaces by:
- first writing a first segment of the data to the second disk surface;
- and
- second writing a second segment of the data to the third disk surface.
10 more elements
Dependencies are inferred from the claim text.