公开(公告)号：US20170308486A1

公开(公告)日：2017-10-26

申请号：US15510075

申请日：2014-12-04

申请人： Hitachi, Ltd.

发明人： Yuki KOTAKE ,  Tomohisa OGASAWARA ,  Toru ANDO ,  Hidechika NAKANISHI ,  Yukiyoshi TAKAMURA

IPC分类号： G06F13/16 ,  G06F13/40 ,  G06F13/42

CPC分类号： G06F13/1673 ,  G06F3/061 ,  G06F3/0635 ,  G06F3/0653 ,  G06F3/0689 ,  G06F13/12 ,  G06F13/1605 ,  G06F13/385 ,  G06F13/4068 ,  G06F13/4282

摘要： 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.

公开(公告)号：US20230119196A1

公开(公告)日：2023-04-20

申请号：US17688270

申请日：2022-03-07

申请人： Hitachi, Ltd.

发明人： Yuki KOTAKE ,  Yukiyoshi TAKAMURA

IPC分类号： G06F21/44 ,  G06F3/06

摘要： 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.

公开(公告)号：US20220300158A1

公开(公告)日：2022-09-22

申请号：US17475862

申请日：2021-09-15

申请人： Hitachi, Ltd.

发明人： Hiroki KUSHIDA ,  Yuki KOTAKE ,  Takafumi MARUYAMA ,  Akihiro SHIKANO

IPC分类号： G06F3/06

摘要： A storage apparatus comprises: a plurality of storage devices that read and write data by operating in any one of a plurality of operation modes which vary in electric power consumption; and a control unit that controls the storage devices, wherein each of the plurality of storage devices retains power state information indicating electric power consumption of each of the operation modes; and wherein the control unit acquires the power state information from each of the plurality of storage devices and sets the operation modes for the plurality of storage devices on the basis of the acquired power state information and permissible electric power consumption which can be assigned to each of the storage devices.