Fujitsu Corporation

Atsushi Katano

Atsuhiro Otaka

Nobuyuki Honjo

Shinichi Nishizono

Takashi Kawada

Kazuyoshi Watanabe

Akihiro Ueda

Kenji Hattori

Atsushi Takakura

Minoru Maeda

Naoto Takeishi

Hidemasa Hatano

A monitoring server includes a transmission and reception unit that receives information from a first storage device and a second storage device by performing polling to the first storage device and the second storage device at a certain interval, and transmits the received information to the first storage device and the second storage device at next polling. The first storage device and the second storage device includes a failover processing unit that inactivates a communication port when the failover processing unit determines that abnormality has occurred in a communication path between the first storage device and the second storage device and determines, based on the polling from the monitoring server, that abnormality has occurred in a communication path between the storage device and the monitoring server.

Storage system, storage device, and monitoring server

A storage device for storing data includes a device configured to store data read or written by a host, a command storage unit configured to store commands transmitted by the host to acquire information relating to the device, a command acquisition unit configured to acquire commands issued to the device when the host requests access to the data stored in the device, and an access determination unit configured to permit the access, if the commands acquired by the command acquisition unit have been stored in the command storage unit.

Storage device, access control program recording medium, and control method of storage device

A connection apparatus interposed between a storage device including at least one storage section and a plurality of controllers for controlling the storage device, the connection apparatus includes a notification section that transfers, when a notification indicating occurrence of a state variation relating to the storage section is received from the storage device, the notification to at least one of the controllers, a monitoring section that monitors access from the at least one of the controllers, to which the notification has been transferred, to the storage device through the connection apparatus, and a notification controlling section that changes over, when it is detected by the monitoring section that the access has been terminated, a transfer destination of the notification by the notification section to one or more of the controllers to which the notification has not been transferred.

Connection apparatus, processing method for connection apparatus and computer-readable recording medium in which processing program is recorded

An access control apparatus which establishes a connection based on connection establishment requests from connected devices and controls accesses to a connection target device. The access control apparatus includes a connection information managing unit which manages connect wait conditions to the connection target device of the connected devices based on criterion information in a connection request transmitted from the connected devices and determination for selecting one connected device from the connected devices. The access control apparatus includes a selecting unit which selects one of the connected devices which has a delay tendency related to connection based on adjustment information which is set in accordance with the connect wait conditions of the connected devices and increases a delay tendency in connection of the connected device, and a determining unit which determines the connected device selected by the selecting unit as one to be connected to the connection target device.

Access control apparatus, access control method and storage system

A connection expansion device connected to devices includes a plurality of ports to which devices are connected, a storage unit configured to record device information obtained from each port, and a processing unit configured to specify, based on the device information, a port in which an abnormal device exists, invalidate device information belonging to the port, and cause the storage unit to hold device information of a normal device.

Growing community of inventors

Kawasaki, Japan

Atsushi Katano