Hitachi, Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Mitsubishi Jidosha Engineering Kabushiki Kaisha

Takao Yoshikawa

Yusuke Nonaka

Katsuhiro Suzuki

Seiichi Takasaki

Hiroaki Kano

Hideki Honjo

Masahide Kawarasaki

Jin Choi

Ken Muguruma

Takanori Yamamoto

Tomoya Nishita

Hideki Honio

Ko Asai

Takashi Nogami

A storage controller measures a RAID group (RG) operating time, which is the operating time of an RG. The storage controller then corrects the measured RG operating time, which is used to calculate the operating rate of the RG, on the basis of a correction coefficient associated with the type of the physical devices (PDEVs) constituting the RG, and on the basis of the RG backend multiplicity, which is the multiplicity of the I/O commands transmitted to the RG.

Storage system and storage system management method

A battery tray is fixed onto a front battery cross member lower and a rear battery cross member lower. The battery pack is mounted on the battery tray. The front battery cross member lower and the rear battery cross member lower come into contact with a deformable zone of the battery tray and the end face of each of battery cross member uppers at attachment portions. Space is created between the battery pack and the battery cross member uppers. The battery cross member uppers are welded so that a deformable zone having relatively low rigidity is formed. In this way, the front battery cross member lower and the rear battery cross member lower are fixed to a pair of side members through the battery cross member uppers.

Battery installation structure for electric vehicles

Growing community of inventors

Tokyo, Japan

Takao Yoshikawa