Hard disk device and method of controlling the same
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsYosuke Kondo, Kana Furuhashi
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Abstract
A hard disk device accepts logical block addresses (LBAs) from a host. The hard disk device includes a disk having a plurality of physical sectors from which data is read and to which data is written, and a processor configured to perform read and write operations on the disk in response to read and write commands from the host that designate LBAs. The processor, in response to a request for initialization, does not perform any write operations on the disk, and generates a new mapping of LBAs to the physical sectors for a current generation based on unusable sectors detected during a previous generation, and tracks differences in correspondence between LBAs and the physical sectors between the current generation and the previous generation.
Claims20
A hard disk device that accepts logical block addresses (LBAs) from a host, the hard disk device comprising:
- a disk having a plurality of physical sectors from which data is read and to which data is written;
- and
- a processor configured to perform read and write operations on the disk in response to read and write commands from the host that designate LBAs, wherein
- the processor, in response to a request for initialization, does not perform any write operations on the disk, and generates a new mapping of LBAs to the physical sectors for a current generation based on unusable sectors detected during a previous generation and tracks differences in correspondence between LBAs and the physical sectors between the current generation and the previous generation.
A method of performing operations on a disk of a hard disk device having a plurality of physical sectors, said method comprising:
- in response to a request for initialization received from a host, generating a new mapping of logical blocks addresses (LBAs) to the physical sectors for a current generation without performing any write operations on the disk, based on unusable sectors detected during a previous generation;
- and
- tracking differences in correspondence between LBAs and the physical sectors between the current generation and the previous generation.
Dependencies are inferred from the claim text.