Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorYuki Kawamitsu
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Abstract
According to one embodiment, a magnetic disk includes a disk, first and second heads which write data to the disk and read data from the disk, a first actuator includes the first head, a second actuator includes the second head, first and second controllers which control the first head, the second head, the first actuator and the second actuator, an auxiliary power supply which supplies power when power from a power supply is shut off, and a power supply detection unit which makes power supplied from the auxiliary power supply to the first controller higher than the power supplied from the auxiliary power supply to the second controller when shutoff of power from the power supply is detected.
Claims11
A magnetic disk device comprising:
- a disk;
- first and second heads which write data to the disk and read data from the disk;
- a first actuator comprising the first head;
- a second actuator comprising the second head;
- first and second controllers which control the first head, the second head, the first actuator and the second actuator;
- an auxiliary power supply which supplies power when power from a power supply is shut off;
- and
- a power supply detection unit which makes power supplied from the auxiliary power supply to the first controller higher than the power supplied from the auxiliary power supply to the second controller when shutoff of power from the power supply is detected;
- wherein the power supplied from the auxiliary power supply to one of the first and second controllers is reduced immediately after the power from the power supply is shut off.
Dependencies are inferred from the claim text.