Patent ID: 11875824
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A magnetic disk device comprising:
magnetic disks;
a plurality of actuator systems configured to perform write/read on the magnetic disks;
a plurality of controller chips each including a buffer control circuit, each of the plurality of controller chips being configured to control a corresponding one of the plurality of actuator systems; and
a buffer memory, wherein
the plurality of controller chips include a first controller chip, a second controller chip, and a third controller chip,
the first controller chip is connected to the buffer memory via the buffer control circuit included in the first controller chip, and is connected to the second controller chip, the first controller chip being configured to operate at a first frequency,
the second controller chip is connected to the first controller chip and the third controller chip, the second controller chip being configured to operate at a second frequency higher than the first frequency, and
the third controller chip is configured to operate at a third frequency higher than the second frequency.