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US 10,665,263 B1Granted
Data storage device converting disk surface to read-only
AssigneeWestern Digital Technologies, Inc.
InventorsShaomin Xiong, Toshiki Hirano, Na Wang, William B. Boyle
Life of this patent
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Abstract
A data storage device is disclosed comprising a first head actuated over a first disk surface, wherein the first head comprises a write coil and a write-assist component. First data is written to the first disk surface using the write coil and the write-assist component of the first head. An electrical bias is applied to the write-assist component of the first head to physically damage the write-assist component, thereby rendering the first disk surface read-only.
Claims11
A data storage device comprising:
- a first disk surface;
- a first head actuated over the first disk surface, wherein the first head comprises a write coil;
- a second disk surface;
- a second head actuated over the second disk surface;
- and
- control circuitry configured to:
- write first data to the first disk surface using the write coil of the first head;
- in response to a host command received from a host to render the first disk surface read-only, relocate at least some of the first data to the second disk surface and render the first disk surface read-only;
- receive from the host the first data, first logical block addresses (LBAs) assigned to the first data, and a first identifier indicating the first LBAs are of a read-only type;
- receive from the host second data, second logical block addresses (LBAs) assigned to the second data, and a second identifier indicating the second LBAs are of a read-write type;
- in response to the first identifier, write the first data to first physical block addresses (PBAs) assigned to the first disk surface, wherein the first LBAs are mapped to the first PBAs;
- and
- in response to the second identifier, write the second data to second PBAs assigned to the second disk surface, wherein the second LBAs are mapped to the second PBAs.
10 more elements
A data storage device comprising:
- a first disk surface;
- a first head actuated over the first disk surface;
- a second disk surface;
- a second head actuated over the second disk surface;
- and
- control circuitry configured to:
- receive from a host first data, first logical block addresses (LBAs) assigned to the first data, and a first identifier indicating the first LBAs are of a read-only type;
- receive from the host second data, second logical block addresses (LBAs) assigned to the second data, and a second identifier indicating the second LBAs are of a read-write type;
- in response to the first identifier, write the first data to first physical block addresses (PBAs) assigned to the first disk surface, wherein the first LBAs are mapped to the first PBAs;
- in response to the second identifier, write the second data to second PBAs assigned to the second disk surface, wherein the second LBAs are mapped to the second PBAs;
- and
- after writing the second data to the second disk surface, render the first disk surface read-only.
9 more elements
A data storage device comprising:
- a first disk surface;
- a first head actuated over the first disk surface, wherein the first head comprises a write coil;
- a second disk surface;
- a second head actuated over the second disk surface;
- and
- control circuitry configured to:
- write first data to the first disk surface using the write coil of the first head;
- in response to a host command received from a host to render the first disk surface read-only, relocate second data from the second disk surface to the first disk surface and render the first disk surface read-only;
- receive from the host the first data, first logical block addresses (LBAs) assigned to the first data, and a first identifier indicating the first LBAs are of a read-only type;
- and
- in response to the first identifier, write the first data to first physical block addresses (PBAs) assigned to the first disk surface, wherein the first LBAs are mapped to the first PBAs.
8 more elements
Dependencies are inferred from the claim text.