Control device, power supply device, and method for controlling power
AssigneeFujitsu Limited
InventorsTakanori Ishii, Kentarou Yuasa, Shinnosuke Matsuda
Life of this patent
Estimating the term…
Abstract
There is provided a control device which includes a cache memory configured to temporarily store data, a nonvolatile memory configured to store a copy of the data stored in the cache memory, a battery configured to supply power to the cache memory in a case of a power failure, a data save processing unit configured to save data stored in a backup target region of the cache memory to the nonvolatile memory in the case of the power failure, and a charge control unit configured to charge the battery up to a target amount of charge which is determined on the basis of a size of the backup target region.
Claims14
A control device comprising:
- a cache memory configured to temporarily store data;
- a nonvolatile memory configured to store a copy of the data stored in the cache memory;
- a battery configured to supply power to the cache memory in a case of a power failure;
- a data save processing unit configured to save data stored in a backup target region of the cache memory to the nonvolatile memory in the case of the power failure;
- and
- a charge control unit configured to charge the battery up to a target amount of charge which is determined on the basis of a size of the backup target region.
A power supply device including a cache memory that temporarily stores data, a nonvolatile memory that saves data stored in the cache memory, and a data save processing unit that saves data stored in a backup target region of the cache memory to the nonvolatile memory in a case of a power failure, the power supply device comprising:
- a battery configured to supply power to the cache memory in the case of the power failure;
- and
- a charge control unit configured to charge the battery to a target amount of charge according to a size of the backup target region.
A method for controlling power used in a storage apparatus that includes a cache memory which temporarily stores data, a nonvolatile memory which saves data stored in the cache memory, a battery which supplies power to the cache memory in a case of a power failure, and a data save processing unit which saves data stored in a backup target region of the cache memory to the nonvolatile memory in the case of the power failure and that accesses a memory device in accordance with a data access request from a higher apparatus, the method comprising:
- determining a target amount of charge according to a size of the backup target region;
- and
- charging the battery up to the target amount of charge.
Dependencies are inferred from the claim text.