Hitachi, Ltd.

Chuma Akira

Naoki Kodama

Fumio Kugiya

Kazuo Sakai

Takuji Ogawa

Kazuo Nakagoshi

Masao Iwakura

Tomio Suzuki

Nobuyuki Okunaga

Tatsuya Ishigaki

Toshiaki Kojima

A magnetic disk drive has a housing for a 3.5 inch form factor and disk media of a diameter for a 2.5 inch form factor. The smaller disk media rotate at a high speed while consuming low electric lower and generating less heat while providing for quick access speeds. Usually, when the magnetic disk media are rotated at a higher speed, the electric power consumption and heat generation are increased because of the load increase. This problem is avoided with the use of cooling fins placed about the periphery of the disk media. Further, the smaller size disk media enable a decrease in torque loss during on-load rotation with the media, and a decrease of electric current to the spindle motor during rotation.

Disc drive having 3.5 inch form factor housing and 2.5 inch form factor disk media

Growing community of inventors

Ashigarashimo-gun, Japan

Chuma Akira