Hitachi, Ltd.

Renesas Technology Corp.

Renesas Electronics Corporation

Hitachi Vantara Corporation

Hoya Corporation

Yusuke Nonaka

Akira Nishimoto

Naoto Matsunami

Akihiko Araki

Akihiro Shimizu

Katsuhiko Ichinose

Shintaro Kudo

Nagatoshi Ooki

Akira Yamamoto

Junji Ogawa

Toshiro Takahashi

Kazuhisa Suzuki

Yasunobu Yanagisawa

Ikuya Yagisawa

Fumio Ootsuka

Yoshiki Kano

Shoji Kodama

Koji Sonoda

Sadahiro Sugimoto

Yoichi Mizuno

Masanori Takada

Hideto Kazama

Sohei Omori

Tomoyasu Furukawa

Satoshi Shimamoto

Koji Nagata

Satoshi Sakai

Tomohiro Saito

Hiroshi Miki

Tomohiro Yoshihara

Yuko Matsui

Hideyuki Koseki

Noboru Morishita

Azuma Kano

Naoya Okada

Yutaka Nakagawa

Miho Imazaki

Yuki Sakashita

Shinya Sugino

Yoshiaki Eguchi

Ai Satoyama

Hiroaki Akutsu

Atsushi Kawamura

Masakuni Agetsuma

Kenta Shiga

Yoshinori Ohira

Shunji Kawamura

Koichi Sato

Makio Mizuno

Koji Arai

Ryosuke Tatsumi

Atsushi Ishikawa

Tetsuya Shirogane

Yoshihiro Yoshii

Akihiro Mannen

Shugo Ogawa

Kosuke Sakai

Kenji Ishii

Hiroyuki Hayashi

Masahide Kawarasaki

Keiichi Tezuka

Koichi Ueno

Koichi Tanaka

Jin Choi

Atsumi Aoki

Takao Yoshikawa

Yudai Takayama

Yoshiki Tamura

Shunichi Wakabayashi

There is provided a storage migration method including sending, by a maintenance PC, a power-off instruction for migration to a migration source storage, sending, by the migration source storage, storage configuration information to the maintenance PC, turning off the power of the migration source storage when it is confirmed that the maintenance PC has received the storage configuration information, sending, by the maintenance PC, the storage configuration information and a power-on instruction for migration to a migration destination storage, and outputting, by the maintenance PC, a migration completion notification when a disk drive relocated from the migration source storage can be confirmed to be set in the migration destination storage.

Storage migration method and storage system

Performance deterioration of a storage system is prevented. A storage controller includes one or more processors, and one or more memories configured to store one or more programs to be executed by the one or more processors. The one or more processors are configured to execute conversion of converting metadata before conversion for controlling the storage system into metadata after conversion in a format corresponding to a new controller newly installed in the storage system, execute control of switching an access destination between the metadata before conversion and the metadata after conversion according to an access control code during the conversion, and access the metadata before conversion without using the access control code before start of the conversion.

Metadata access and conversion during storage system controller update

The present invention effectively utilizes computation resources by allocating the computation resources, in accordance with conditions, to a process that shares a computation resource with another process and a process that occupies a computation resource. Execution control causes a processor core allocated to a storage control process to be occupied by the storage control process, the execution control causes a processor core allocated to an application process to be shared with another process, and the execution control changes the number of processor cores allocated to the storage control process on the basis of I/O information indicating a state of an I/O.

Computer system and process execution method

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

This storage system comprises a block interface, a block control unit, a file control unit, and shared memory. The file control unit and block control unit are coupled via a first memory-through path structured to pass through a first area of the shared memory, and via a second memory-through path structured to pass through a second area of the shared memory. The block control unit has a protocol control unit and a virtual driver; exchanges control information for the file control unit with the file control unit via the first memory-through path; uses the virtual driver to convert an I/O request passed from the file control unit via the second memory-through path and processes the result with a protocol processing unit; and bypasses the virtual driver and uses the protocol processing unit to process a block I/O request transferred from the block interface via a physical path.

Storage system and storage control method

When mounting hardware which is coupled to another portion by a plurality of paths with different applications, despite the hardware being a single device, and a failure occurs in any of the paths, there is a risk that the failure may propagate to other components unless the other paths are also blocked. In order to solve the problem described above, in a storage apparatus to which a device coupled by a plurality of coupling paths with different applications can be mounted, the present invention determines a block range at the time of an occurrence of a failure to be a device and a plurality of coupling paths coupled to the device, manages the block range, and upon an occurrence of a failure, executes failure handling which involves blocking an appropriate block range determined in advance by referring to the information.

Computer system and control method therefor for handling path failure

A storage system manages correspondence relationships between physical addresses and logical addresses inside a storage device, as well as logical spaces provided by a plurality of storage devices, and when a determination is made as to whether first data and second data are stored in the same storage device in a case in which the first data and the second data are exchanged inside a logical space, and the determination is found to be affirmative, the storage device replaces the logical address corresponding to the first data with the logical address corresponding to the second data without changing the physical address of the physical area in which the first data is stored and the physical address of the physical area in which the second data is stored.

A semiconductor device includes an n channel conductivity type FET having a channel formation region formed in a first region on a main surface of a semiconductor substrate and a p channel conductivity type FET having a channel formation region formed in a second region of the main surface, which second region is different from the first region. An impurity concentration of a gate electrode of the n channel FET has an impurity concentration greater than an impurity concentration of the gate electrode of the p channel FET to thereby create a tensile stress in the direction of flow of a drain current in the channel forming region of the n channel FET. The tensile stress in the flow direction of the drain current in the channel forming region of the n channel FET is greater than a tensile stress in the direction of flow of a drain current in the channel forming region of the p channel FET.

P-channel transistor having an increased channel mobility due to a compressive stress-inducing gate electrode

In a storage system, first and second controllers have respective first and second buffer and cache areas. The first controller stores write data in accordance with a write request in the first cache area without involving the first buffer area and to transfer the stored write data to the second cache area without involving the second buffer area. The first controller is configured to determine which of the first and second cache areas is to be used as a copy source and to be used as a copy destination depending on whether the storing of the first write data in the first cache area had been successful or on whether the transfer of the write data from the first cache area to the second controller had been successful, and by copying data from the copy source to the copy destination, recovers data in an area related to a transfer failure.

Failures in a storage system are managed at low cost and with high reliability. A storage system is coupled to a file command issuing apparatus and a block command issuing apparatus, and processes commands from both. The storage system is provided with: a first control portion which is provided extending across a plurality of clusters and which is configured to control block access requests to a disk device; a plurality of second control portions which are configured to process file access requests and provided respectively in the clusters, and operate on virtual machines managed by a virtualization control portion; failure detecting portions which are configured to detect failures within each of the clusters; and a failure information management portion which is provided in the first control portion and which is configured to consolidate and manage failure information relating to failures detected by the failure detecting portions.

Storage system which is capable of processing file access requests and block access requests, and which can manage failures in A and storage system failure management method having a cluster configuration

A storage controller has a processor, a volatile first cache memory that is coupled to the processor and that temporarily stores data, a nonvolatile second cache memory that is coupled to a microprocessor and that temporarily stores data, and a battery that is configured to supply electrical power to at least the processor and the first cache memory when a power stoppage has occurred. The second cache memory includes a dirty data area for storing dirty data, which is data that is not stored in the storage device, and a remaining area other than the dirty data area. When a power stoppage has occurred, the processor stores as target data in the remaining area of the second cache memory either all or a part of the data stored in the first cache memory.

Storage system

The present invention is a clustered storage system with which, even when access to the processor of another controller is sent from the processor of one controller, the processor of the second controller is able to prioritize processing of this access so that I/O processing is also prevented from being delayed. With the storage system of the present invention, the first processor of the first controller transmits request information which is to be processed by the second processor of the second controller to the second processor by differentiating between request information for which processing is to be prioritized by the second processor and request information for which processing is not to be prioritized, and the second processor acquires the request information by differentiating between request information for which processing is to be prioritized and request information for which processing is not to be prioritized.

Computer system and control method thereof

When a failure occurs in a storage system controller, the controller reboots after completing prescribed failure processing for respective control parts. Upon detecting a failure, first, second, and third control parts of the controller perform respective failure processing. The first control part controls block access requests, the second control part controls file system access, and the third control part manages the second control part. The first control part and third control part write prescribed information to a storage area and reboot at least a portion of the controller upon detecting the failure.

Storage system and storage system failure management method

Semiconductor device and a method of manufacturing the same

A solid-state image sensing device is configured such that a first voltage is applied to a first conductivity type semiconductor region and a second voltage is applied to source-drain regions having a second conductivity type of the MOS capacitance to apply inverse bias between the semiconductor region and the source-drain regions of the MOS capacitance.

Solid-state image sensing device

Growing community of inventors

Sagamihara, Japan

Yusuke Nonaka