Hitachi, Ltd.

Akihiro Mori

Kiyohisa Miyamoto

Masashi Kimura

Kunihiko Nashimoto

Junichi Muto

Ran Ogata

Kazue Jindo

Hisaharu Takeuchi

Isamu Kurokawa

Shinichi Hiramatsu

Mamoru Sato

Kazuhiro Murata

Teruhiko Matsumoto

Yuya Goto

Hidenobu Funaki

Takumi Sano

Takahiro Arakawa

Masae Matsuura

A storage apparatus includes a microprocessor package configured to access a logical volume and a local memory in the microprocessor package. An input/output (I/O) request range of one I/O request, including a start position address and an end position address of the logical volume which is a target of the one I/O request, is stored in the local memory. A counter value indicating a number of I/O requests to and from the logical volume associated with the one I/O request is acquired and stored in the local memory. If the counter value associated with the one I/O request is greater than the counter value associated with another I/O request, the I/O request ranges of the one I/O request and the other I/O request are compared. If there is no overlap between the I/O request ranges, the one I/O request is executed; otherwise, the one I/O request is placed on standby.

Storage apparatus and method for executing exclusive extent processing in parallel using counter values

Each actual page inside a pool is configured from a plurality of actual tracks, and each virtual page inside a virtual volume is configured from a plurality of virtual tracks. A storage control apparatus of a mainframe system has management information that includes information denoting a track in which there exists a user record, which is a record including user data (the data used by a host apparatus of a mainframe system). Based on the management information, a controller identifies an actual page that is configured only from tracks that do not comprise the user record, and cancels the allocation of the identified actual page to the virtual page.

Mainframe storage apparatus that utilizes thin provisioning

Proposed is technology for shortening the time required for analyzing and processing commands issued from multiple hosts and speeding up the processing. When a controller receives a command including random IO processing and the reception of commands is complete, it determines whether the valid extents prescribed in seek parameters attached to an LOC command overlap, and executes extent exclusive wait processing which causes access to the logical volume to enter a wait state or access processing to the logical volume based on the determination result. If the reception of commands is incomplete, the controller determines whether the access ranges (extents) designated in a DX command overlap, and executes extent exclusive wait processing or access processing to the logical volume based on the determination result.

Storage system and its multiple extent exclusive control method

By the same method as that of making data access to a data storage area in an online state, it is performed to access a data storage area other than the data storage area. A plurality of logical volumes carried by a disk array apparatus includes an online volume that is in an online state to a host and an offline state that is in an offline state to the host. The host transmits an access command including target information designating a target volume to the disk array apparatus as an access command to a starting volume other than the target volume. The disk array apparatus receives the access command to the starting volume and offers the data access to the target volume on the basis of the target information carried by that access command to the host.

System for accessing an offline storage unit through an online storage unit

A storage controller of the present invention is capable of providing a plurality of external volumes to a mainframe as a single virtual volume without lowering write performance. A virtual volume inside a main storage apparatus is associated with a plurality of external volumes inside an external storage apparatus. When the mainframe formats the virtual volume, a control information creation unit of the main storage apparatus creates and stores control information related to the virtual volume. Consequently, it is possible to enhance processing performance when the write size specified by the mainframe coincides with the data size set in the write destination, that is, during a so-called isometric write.

Mainframe storage controller and mainframe volume virtualization method

The present invention provides a storage control subsystem that facilitates logical volume access management by a host. Before copying, the host instructs a disk array device to identify the states of target logical volumes and collect information in control memory, whereupon the disk array device reads information in the control memory and reports information relating to the target logical volumes to the host.

Storage control subsystem for managing the online and offline states of logical volumes

The lock construction portion of a storage system receives, from a hostor SVP, the number of hosts which is the number of hostsactually connected to the storage system, and the number of groups which is the number of storage device groups among a plurality of storage device groupsfor which access exclusion control must be performed. Based on the received number of hosts and number of groups, the lock construction portion controls for which storage device groups to provide control blocks, and the number of control sub-blocks to provide in different control blocks.

Storage system and storage control method for access exclusion control of each storage area unit comprising storage area of storage device

System and method for accessing an offline storage unit through an online storage unit

Storage control subsystem for managing logical volumes

A storage system has a host computer and a storage control device connected thereto. The system controls duplication of data in a first logical volume to be stored in real-time in a second logical volume different therefrom, and makes a logical volume identifier and a data set identifier for the first volume described in the first volume's management information and a logical volume identifier and a data set identifier for the second volume described in the second volume's management information match during the duplication. The system generates a control program for setting the first volume's logical volume identifier and data set identifier in the first volume's management information and the second volume's logical volume identifier and data set identifier in the second volume's management information to differ and, by executing this program, makes the second volume be recognized by an OS as a volume independent of the first volume.

Storage system, storage system control method, and storage medium having program recorded thereon

The information processing apparatus equipped with a liquid crystal display apparatus that is usable in the face-to-face usage style. When the display direction is switched into the facing direction and in a normal usage state, the liquid crystal display apparatus exhibits an excellent visual recognizability and complicated operations are unnecessary. The image information, the picture direction of which has been inverted upside down, is outputted from the information processing unit to the display unit in such a manner as to be coupled with the picture direction change instructing member . At the same time, the luminance information at the time of the picture upside-down inversion, which has been set in advance into the luminance adjusting member , is supplied to the display unit so as to change the luminance simultaneously with the picture inversion. At this time, the luminance of the display unit at the time of the picture upside-down inversion is changed to a higher luminance, thereby making it possible to enhance the visual recognizability from the facing side.

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Odawara, Japan

Akihiro Mori