Hgst Netherlands, B.v.

Toshihisa Kiyonaga

Takao Suzuki

Kohji Takahashi

Tomoki Hiramatsu

Yasuhiro Iihara

Yoshiroh Amano

Yoshifumi Kataoka

A HDD including a temperature sensor for sensing ambient temperature in the HDD, a spindle motor comprising a fluid dynamic bearing; and a controller configured for adjusting a rotational speed of the spindle motor based on the measured ambient temperature while a rigidity of the fluid dynamic bearing is maintained, and reducing power consumption of the HDD based on the adjusting the rotational speed of the spindle motor.

Adjusting rotational speed based on ambient temperature in a HDD

A HDD including write components configured to operate within an operating voltage range, charging circuitry comprising a charging capacitor. The charging capacitor includes a higher voltage when charged than the operating voltage range. The HDD also includes pulse circuitry configured to pulse power from the charging circuitry to the write components within the operating voltage range during a controlled shut down of the write components such that remaining data-sector bits are written during the controlled shut down.

Pulse power during a shut down in a hard disk drive

Growing community of inventors

Kanagawa, Japan

Toshihisa Kiyonaga