Fujitsu Corporation

Fujistu Limited

Mikio Ito

Kazuhiko Ikeuchi

Hidejirou Daikokuya

Hideo Takahashi

Norihide Kubota

Yoshihito Konta

Hidejiro Daikokuya

Shinya Mochizuki

Chikashi Maeda

Tsukasa Makino

Hiroaki Ochi

Yasutake Sato

Akihito Kobayashi

Koji Uchida

Shinichi Nishizono

Kazuma Takatsu

Katsuhiko Nagashima

Yasutake Satou

Satomi Mamiya

Hiroaki Sato

Riichiro Take

Yuuji Hotta

Eisaku Takahashi

Yuji Noda

Yukihiro Yoshiya

Hiroyuki Hoshino

Osamu Kimura

Masaru Shimmitsu

Yoshio Kitamura

Tadaomi Kato

Minoru Muramatsu

Tadashi Hirano

Tsuyoshi Nakagami

Kazuo Nakashima

Atsushi Igashira

Hideki Yamanaka

Fumio Hanzawa

Hiroshi Shiomi

Naoyoshi Toshine

Yusuke Inai

Tohru Kobayashi

Sanae Kamakura

Hiroyasu Inagaki

Nobuyuki Kikuchi

Yasuhiro Onda

Yasuhito Kikuchi

Koji Yamaguchi

Futoshi Watanabe

Takaaki Saito

Kuniko Omido

Yoichi Yasufuku

Masami Ikeno

Takako Kato

Yuuji Noda

Yukinori Matsukawa

An information processing apparatus includes a memory and a processor coupled to the memory. The memory stores first information and second information. The first information includes a permission time with respect to each of a plurality of operation states of the information processing apparatus in an activation state. The permission time is a time allowed for switching a substitute apparatus from a standby state to the activation state. The second information includes an activation time required for activating each of a plurality of modules which operate on the substitute apparatus. The processor identifies one permission time corresponding to a current operation state. The processor determines stop modules such that a total time for activating the stop modules is equal to or less than the one permission time based on the second information. The processor instructs the substitute apparatus in the standby state to stop the stop modules.

Information processing apparatus and information processing system

A control device includes a processor. The processor is configured to receive a write request to write content data. The processor is configured to divide the content data into leading first data and subsequent second data. The processor is configured to write the first data to a first storage resource in a first storage group among a plurality of storage groups having operating rates different from each other. The first storage group has a first operating rate higher than operating rates of any other storage groups. The processor is configured to write the second data to a second storage resource in a second storage group. The second storage group has a second operating rate lower than the first operating rate. The processor is configured to activate, in parallel with the writing of the first data, the second storage resource when the second storage resource is in a non-operating state.

Control device and storage system

According to an aspect of an embodiment, a storage system for storing data from a host device, comprising: a plurality of storage units for storing data, in a manner to enable recovery of data stored in one of said storage units by the use of data stored in the rest of storage units; an extra storage unit; and a controller for controlling said storage units and said extra storage unit according to a process comprising: receiving information indicative of fault prediction in one of storage units, recovering data stored in said one of said storage units by the use of data storage in the rest of said storage units, and writing the recovered data into said extra storage unit.

Storage system, storage control method, and storage control program

A disk array control apparatus controls a disk array having a redundant configuration with two or more disk devices and a spare disk provided for lack of redundancy in the disk array. And the disk array control apparatus includes a failure detecting unit for detecting the lack of redundancy in the disk array, and a rebuilding control unit for performing rebuilding processing on a dedicated spare disk device assigned to the disk array with the lack of redundancy, the dedicated spare disk being the spare disk dedicatedly assigned to the two or more disk arrays including the disk devices having a same characteristic as that of the spare disk.

Disk array control apparatus

Even if failure, or the like, occurs during the encryption process, the encryption process is surely resumed. A flag changing unit changes an encryption flag of one disk to being encrypted after an encryption request is received and before the encryption of the data stored on the one disk is started. The flag changing unit changes the encryption flag of the one disk to having been encrypted and changes the encryption flag of the other disk to being encrypted before copying the encrypted data from the one disk to the other disk is started. The flag changing unit changes the encryption flag of the other disk to having been encrypted after copying to the other disk is completed.

Encryption device and encryption method

A code conversion apparatus, a disk drive, a code buffer, and an encryption buffer are included in a storage. The code buffer stores therein first encrypted data present in the disk drive, and the encryption buffer stores therein first unencrypted data present in the disk drive. An encrypting unit encrypts the first unencrypted data present in the encryption buffer to predetermined encrypted data, and a decrypting unit decrypts the first encrypted data present in the code buffer to second unencrypted data. Moreover, a re-encrypting unit decrypts the first encrypted data present in the code buffer to third unencrypted data and encrypts the third unencrypted data to second encrypted data different from the first encrypted data.

Code conversion apparatus, code conversion method, and computer product

A storage control device for managing data in a storage while maintaining redundancy of the data includes a formatting management table, a formatting processing section, a recovery management table and a recovery processing section. The formatting management table manages a formatted region and an unformatted region in a management target volume. The formatting processing section executes formatting of the unformatted region in the management target volume on the basis of the formatting management table. The recovery management table retains a content of the formatting management table at a point of occurrence of a redundancy restoration event when a redundancy restoration event has occurred during formatting. The recovery processing section executes recovery of a formatted region, which had been formatted at the point of occurrence of the redundancy restoration event, on the basis of the recovery management table in parallel with the formatting.

Storage control device for formatting to storage media, storage control method for formatting to storage media, and medium for storing storage control program for formatting to storage media

A disk controller for controlling disk devices for storing redundant data distributed thereacross, the disk devices providing a logical volume, the disk devices including pool volumes allocatable to one of the logical volume. The disk controller includes a memory for storing information indicating a relationship between the pool volumes and the logical volume; and a processor for performing data reconstruction in accordance with a failure of the disk devices, a process of the data reconstruction, the processor being configured to detect an error in a part of the pool volumes included in the other disk devices when reading data from the pool volumes included in the other disk devices, determine whether the detected pool volume is allocated to the logical volume in reference to the information, and initialize the part of the detected pool volume when the detected pool volume is unallocated to the logical volume.

Disk controller and disk control method

A RAID-group converting apparatus converts two RAID groups into one RAID group. The RAID-group converting apparatus includes: a data-reading unit that reads at least non-parity data from data including the non-parity data and parity data, for each stripe from a plurality of recording media belonging to the two RAID groups; a parity-generating unit that generates two parities using the data belonging to a same stripe read by the data-reading unit; and a parity-writing unit that writes the two parities generated by the parity-generating unit into a parity storage area belonging to the same stripe.

Raid-group converting apparatus and method

According to an aspect of an embodiment, a method of storing user data (UD) with parity data (PD) for correcting the UD in a storage apparatus comprising disk units, each of the disk units storing data in data blocks(DBs), each of the DBs storing the UD or associated PD and position information(PI) indicative of the location of the DBs, comprising: obtaining the UD, dividing the UD into UD blocks (UDBs) which are adapted to be stored in the DBs, and determining which UDBs are to be stored into which DBs, respectively; determining PI of the DBs for storing the UDBs; generating PD for a group of UDBs and associated PI by parity operation using a weighting function to the UDBs and the PI; determining PI for the PD for said group by modifying a part of the PD; and storing the group of the UDBs, associated PI, and the PD.

Storage controlling device and storage controlling method

A device management apparatus that executes an initialization processing to a device that stores user data includes a first initialization processing section for executing a first initialization processing in which a progress status of an initialization is notified to another device management apparatus every time when the initialization equivalent to a processing unit of the initialization processing is executed to the device, a second initialization processing section for executing a second initialization processing in which a progress status of an initialization is notified to the another device management apparatus every time when the initialization for the predetermined number of processing units is executed to the device, a monitoring unit for monitoring a status of access to the device and an operation state of the device, and a changeover section for changing over the first initialization processing and the second initialization processing based on a monitoring result.

Device management apparatus, device initialization method, and device system

A disk array provided with a RAID group in a Redundant Array of Inexpensive Disks (RAID) configuration with redundancy of two, the disk array includes, a data recovery technique selecting unit to select a technique for recovering data from a first failed disk to be recovered first, the technique being selected from among a plurality of techniques based on the type of storage apparatus included in the RAID group, and I/O conditions with respect to the RAID group, when failures occur in two storage apparatus in the RAID group, a data recovering unit to split recovered data from the first failed storage apparatus and writing the recovered data to two recovery storage apparatus in accordance with the data recovery technique selected by the data recovery technique selecting unit, and an aggregating unit to aggregate the recovered data onto one of the two recovery storage apparatus.

Selective recovery and aggregation technique for two storage apparatuses of a raid

A storage control device includes a first rebuilding unit rebuilding information stored in one of a plurality of storages that fails by using information stored in the plurality of storages excluding said failed storage and storing rebuilt information in a spare storage replaced with the failed storage, a second rebuilding unit rebuilding information stored in two of said plurality of storages that fail by using information stored in said plurality of storages excluding the two failed storages and storing rebuilt information in two spare storages replaced with the two failed storages, and a rebuilding control unit for controlling said first rebuilding unit and second rebuilding unit where one of said spare storages fails during rebuilding the data stored in said two failed storages to replace the failed spare storage with other spare storage whereby said second rebuilding unit continues rebuilding the data.

Storage control device, storage control method and storage control program

A RAID apparatus includes a plurality of recording devices, a first adaptor connected to a first interface which is connected to a high-level apparatus, a controller for controlling processing of data transmitted by the high-level apparatus, and a second adaptor that connects to a second interface connected to a plurality of recording devices. The controller has a first memory area in which said data are stored, a second memory area used for a write-back of the data in said plurality of recording devices, a write-back information control unit controlling a write-back type of data stored in the first memory area and a usage state of the second memory area, a write-back data determination unit for determination of data to be written-back based on the write-back information, and a write-back execution unit for executing a write-back of the data to be written back on the plurality of recording devices.

RAID apparatus, controller of RAID apparatus and write-back control method of the RAID apparatus

A storage system includes data storage devices, spare storage devices used when a failure occurs in a data storage devices, a group management unit that divides the data storage devices into groups and implements a redundancy, a data storage device restoration unit that assigns the spare storage device as a replacement when a failure occurs, and a configuration change unit changing configuration of the group to which the data storage devices belong. The configuration change unit includes, a spare storage device securing unit that secures the spare storage device, a change processor that writes data concerning the group into the spare storage device, and a change restoration unit that performs continuation of the configuration change, or restoration of the group to a state in a start, using the data written into the spare storage device when the configuration change of the group is interrupted.

Storage management device, storage management method, and storage system

Growing community of inventors

Kawasaki, Japan

Mikio Ito