Method, program and apparatus for power control through an electronic information device in a magnetic disk unit
AssigneeLenovo (Singapore) Pte. Ltd.
InventorsYuji Chotoku, Takashi Sugawara, Takashi Yomo
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Abstract
A power control method for a magnetic disk unit is disclosed. The method includes identifying a type of a last instruction sent to a magnetic disk unit and, in response to identifying the type, setting a wait time that varies according to the type. In response to the wait time having elapsed after a completion of processing ordered by the last instruction, an idle instruction is sent to the magnetic disk unit for placing the magnetic disk unit in an idle state in which power consumption is reduced.
Claims20
A power control method for a magnetic disk unit, said method comprising:
- identifying a type of a last instruction sent to a magnetic disk unit;
- in response to identifying said type, setting a wait time that varies according to said type;
- and
- in response to said wait time having elapsed after a completion of processing ordered by said last instruction, sending an idle instruction to said magnetic disk unit for placing said magnetic disk unit in an idle state in which power consumption is reduced.
A power control system for a magnetic disk unit, said system comprising:
- means for identifying a type of a last instruction sent to a magnetic disk unit;
- means for, in response to identifying said type, setting a wait time that varies according to said type;
- and
- means for, in response to said wait time having elapsed after a completion of processing ordered by said last instruction, sending an idle instruction to said magnetic disk unit for placing said magnetic disk unit in an idle state in which power consumption is reduced.
The system of claim 14, further comprising means for increasing said wait time in response to sending said alternate instruction.
A machine-readable medium having a plurality of instructions processable by a machine embodied therein, wherein said plurality of instructions, when processed by said machine, causes said machine to perform a method for power control for a magnetic disk unit, said method comprising:
- identifying a type of a last instruction sent to a magnetic disk unit;
- in response to identifying said type, setting a wait time that varies according to said type;
- and
- in response to said wait time having elapsed after a completion of processing ordered by said last instruction, sending an idle instruction to said magnetic disk unit for placing said magnetic disk unit in an idle state in which power consumption is reduced.
Dependencies are inferred from the claim text.