Hitachi, Ltd.

Hitachi Vantara Corporation

Yuki Kotake

Yukiyoshi Takamura

Kentaro Shimada

Naoya Okada

Tomohisa Ogasawara

Hidechika Nakanishi

Toru Ando

Whether a connected drive is an unauthorized drive or not can be judged before it becomes possible for the connected drive to access a memory for a storage controller. When a storage device is connected, an information processing apparatus forms a first communication channel via a first interface incapable of accessing a built-in memory even when the communication connection is established; and a second communication channel via a second interface capable of accessing the built-in memory when the communication connection is established. At a specified timing when the communication connection via the second communication channel is not established, a processor executes authenticity verification processing for verifying authenticity of the storage device on the basis of information acquired from the storage device by using the first communication channel and permits establishment of the communication connection via the second communication channel when the authenticity is confirmed by the authenticity verification processing.

Information processing apparatus, authenticity verification method, and program

A storage system includes a storage controller and a plurality of storage drives. The storage controller holds power management information for managing power supplied to the storage system and power consumption of an operating mounted device of the storage system, and definition information for defining a relationship between power states and power consumption of the plurality of storage drives. The storage controller determines a power budget that can be supplied to the plurality of storage drives, based on the power management information according to a change in a configuration of the storage system, and determines a power state of each of the plurality of storage drives based on the power budget and the definition information.

Storage system

In a first system among first and second systems being a duplexed system as a path to a storage device, in a first SAS expander including a first port directly coupled to a storage device, buffer-on signifying that buffering is to be performed by the first SAS expander is configured with respect to the first port. In the second system, in a second SAS expander including a second port directly coupled to the same storage device, buffer-off signifying that buffering is not to be performed by the second SAS expander is configured with respect to the second port. By selecting any of the first system and the second system as a path of a command, whether or not the command is to be buffered by the first or second SAS expander directly coupled to a storage device serving as a destination of the command is determined.

Storage system and method for controlling command transmission

Growing community of inventors

Tokyo, Japan

Yuki Kotake