Hitachi, Ltd.

Hiatachi, Ltd.

Masahide Sato

Wataru Okada

Yuri Hiraiwa

Yukinori Sakashita

Tsukasa Shibayama

Nobuhiro Maki

Katsuhisa Miyata

Hironori Emaru

Hirokazu Ikeda

Kenta Ninose

Koichi Murayama

Masayuki Yamamoto

Yasunori Kaneda

Takashige Iwamura

Shinji Kimura

Toshiaki Arai

Masamitsu Takahashi

Nobuo Ito

Hiroshi Wake

Toshikazu Umezu

Masaaki Iwasaki

Jun Mizuno

Atsushi Murase

Naoko Ikegaya

Hajime Mori

Masahiro Yamada

Kenichi Kihara

Taketoshi Sakuraba

Masaaki Hosouchi

Satoshi Oshima

Toshihiko Fukuda

Yusuke Izumida

There is disclosed a data storage system used in a computer environment where there are plural host computers and plural storage array controllers. When a remote copy is made while assuring the order of writing across plural storage array controllers, one of the host computers gains copy information about all the storage array controllers associated with the remote copy as a representative. The representative one of the storage array controllers collects and stores copy statuses which are individually managed by the storage array controllers for which a remote copy is made. The host computer gains the copy statuses from the representative controller using an instruction to gain the copy statuses.

Computer system and method of notifying error information of the computer system

This storage system modifies the migration plan in accordance with the state of the migration destination when a plurality of volumes are migrated all at once. Migration-source volumes are migrated collectively to volumes inside the migration-destination storage apparatus. The user can make settings related to migration-source volumes and migration-destination volumes in a migration plan, and can establish a mid-process control plan for modifying the migration plan in the middle of processing. If a failure occurs in the migration-destination storage apparatus subsequent to the commencement of data migration processing, a processing method controller either cancels or temporarily halts the data migration processing, or changes the migration destination, on the basis of the mid-process control plan. When changing the migration destination, a previously selected alternate storage apparatus is selected as the new migration-destination storage apparatus. When a failure occurs in the alternate storage apparatus, yet another alternate storage apparatus is selected.

Storage system and storage system data migration method

Computer system and method of managing status thereof

A data processing system includes a first storage system configured with a virtual logical volume that includes a dynamically expandable volume, a second storage system coupled to the first storage system through a data copy network, a host computer configured to input data to the virtual logical volume, and a management server coupled to the host computer, configured to manage the virtual logical volume.

Data migration in a storage system with dynamically expansible volumes

Arrangements for transfer and replication of data. A host computer retains a transfer volume management information including HDD identifiers corresponding to a plurality of primary volumes and identifiers of at least one of transfer volumes, wherein, from a plurality of volumes in a first storage device, the host computer extracts a reserve volume as an additional transfer volume, if a capacity usage of the at least one of the transfer volumes reaches or goes above a predetermined level, wherein the host computer transmits an allocation request about the additional transfer volume, wherein, after receiving the allocation request, the first storage device implements the reserve volume as the additional transfer volume corresponding to the at least one of transfer volumes for transfer of write data to the second storage device.

Computer system and management method for the transfer and replication of data among several storage devices

When migrating data stored in a storage region assigned to a volume to another storage region, the connection status of the host computer and volume is confirmed. When the host computer and volume are connected, the maximum capacity of the volume requested by the host computer is reserved so that it is exclusively secured in another storage region to which data is to be migrated, and when the host computer and volume are not connected, the current capacity of the volume is reserved so that it is exclusively secured in another storage region.

Data migration and copying in a storage system with dynamically expansible volumes

First information representing a plurality of snapshot acquisition time points of the data storage device, journal management data which are second information including the time point at which data are written to the data storage device and the size of the journal for writing the data, and third information representing a plurality of recovery points are acquired. The total transfer data size of one or more data to be transferred in order to recover the data group of the data storage device at the recovery point is calculated for each recovery point on the basis of the first information, journal management data, and third information. A display screen that visualizes the correspondence relationship between the respective recovery points and respective recovery load information representing a recovery load that is expressed on the basis of the total transfer data size calculated for the respective recovery points is displayed.

Recovery method using CDP

Transfer of data and replication of data among several storage devices are executed without imposing a load on the computer connected to the storage system. For example, a first host computer monitors usage rates of transfer groups TG, TGand physical path usage rate on a storage device interconnect physical path, and when either a usage rate or physical path usage rate goes above a predetermined value, issues to the first storage devicean instruction to allocate a reserved volume R, R. The first host adaptorreceiving the reserved volume R, Rallocation request allocates reserved volume Rto transfer group TG, whereby a virtual transfer volume is formed by transfer volume Tand the reserved volume Rallocated thereto. Capacity of the virtual transfer volume is increased by the equivalent of the reserved volume Rcapacity, so that additional transfer frames may be stored.

A CPUexecutes a management program B (Pb), from a management program A (Pa) receives authentication information, a request, and a program ID, and determines whether the authentication information is correct. If the authentication information is correct, the CPUacquires the execution authority information of the authenticated user, compares the received information, and determines whether execution authority corresponding to the received program ID is defined. If the CPUdetermines that execution authority corresponding to the received program ID is defined, it established the defined execution authority as the execution authority for the management program B (Pb).

Computer and access control method in a computer

A data storing system including: a first, second and third storage systems providing first, second and third logical volumes; wherein the first logical volume and the second logical volume forms a first replication pair which indicates the first logical volume is a replication source and the second logical volume is a replication destination, and the second logical volume and the third logical volume forms a second copy pair which indicates the second logical volume is the replication source and the third logical volume is the replication destination. The replication pairs may adopt differing possible pair statuses, which may affect consistency between such pairs.

Fault management system in multistage copy configuration

A computer system wherein, when a state of the primary host computer is in an active state, a data sent from the primary host computer to the first storage system is copied through a first copy route which includes a route from the first storage system to the second storage system and a route from the second storage system to the third storage system, wherein, if a failure occurs in the primary host computer and a state of the second host computer is to be in an active state, a data sent from the secondary host computer to the second storage system is copied through a second copy route which includes a route from the second storage system to the first storage system and a route from the first storage system to the third storage system.

Computer system, management method and storage network system

Growing community of inventors

Noda, Japan

Masahide Sato