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US 12,625,776 B2Granted
Magnetic disk drive
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorKeigo Sogabe
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a magnetic disk drive includes a flash memory adopting a Serial NAND that includes a plurality of Blocks. The magnetic disk drive determines one or more first Blocks to be used for write at backup, among the plurality of Blocks, based on a write time per the Block in the Serial NAND. The magnetic disk drive backs up data in a nonvolatile memory to the Serial NAND using a counter electromotive force of a spindle motor.
Claims8
A magnetic disk drive, comprising:
- a flash memory adopting a Serial NAND that includes a plurality of Blocks, wherein the magnetic disk drive backs up data in a volatile memory to the Serial NAND using a counter electromotive force of a spindle motor and determines one or more first Blocks to be used for write at backup, among the plurality of Blocks, based on a write time per the Block in the Serial NAND, determines a write order at backup to the one or more first Blocks based on the write time, and preliminarily sorts addresses of the first Blocks in the write order and stores the sorted addresses in the serial NAND.
A magnetic disk drive comprising:
- a flash memory adopting a Serial NAND that includes a plurality of Blocks;
- and
- a PLP information table including a backup execution count, a Block write time measurement result in the Serial NAND, a result of executing address sort for the Blocks in an ascending order of the write time, a Block availability result, and a write frequency (usage count of the Block), wherein the magnetic disk drive backs up data in a volatile memory to the Serial NAND using a counter electromotive force of a spindle motor and determines one or more first Blocks to be used for write at backup, among the plurality of Blocks, based on a write time per the Block in the Serial NAND.
Dependencies are inferred from the claim text.