Patent application number | Description | Published |
20080307120 | INFORMATION SYSTEM AND INFORMATION STORAGE METHOD OF INFORMATION SYSTEM - Provided is an information system for preserving data of a storage device in a computer that repeats the connection to and disconnection from a communication network. The computer acquires data to be written into the storage device and manages the update status of the storage device, transfers the data written into the storage device to the storage controller independent from the writing of data into the storage device when the computer is in a communicable state with the storage controller, and discontinues the transfer of data written into the storage device to the storage controller and manages the transfer status when the computer is not in a communicable state with the storage controller. | 12-11-2008 |
20090106585 | STORAGE SYSTEM - One code (a compressed redundant code) is created based on a plurality of first redundant codes, each created on the basis of a plurality of data units, and this compressed redundant code is written to a nonvolatile storage area. This compressed redundant code is used to restore either a data element constituting a multiple-failure data, or a first redundant code corresponding to the multiple-failure data, which is stored in an unreadable sub-storage area of a partially failed storage device, and to restore the data element constituting the multiple-failure data which is stored in a sub-storage area of a completely failed storage device, based on the restored either data element or first redundant code, and either another data element constituting the multiple-failure data or the first redundant code corresponding to the multiple-failure data. | 04-23-2009 |
20090198887 | STORAGE SYSTEM - A storage group configured by a plurality of storage devices is configured by a plurality of storage sub-groups, and the respective storage sub-groups are configured from two or more storage devices. A sub-group storage area, which is the storage area of the respective storage sub-groups, is configured by a plurality of rows of sub-storage areas. A data set, which is configured by a plurality of data elements configuring a data unit, and a second redundancy code created on the basis of this data unit, is written to a row of sub-storage areas, a compressed redundancy code is created on the basis of two or more first redundancy codes respectively created based on two or more data units of two or more storage sub-groups, and this compressed redundancy code is written to a nonvolatile storage area that differs from the above-mentioned two or more storage sub-groups. | 08-06-2009 |
20090259812 | Storage system and data saving method - This storage system includes a plurality of data drives, a plurality of spare drives for storing data stored in at least one data drive among the plurality of data drives as save-target data, one or more RAID groups configured from the plurality of data drives, one or more spare RAID groups associated with the one or more RAID groups and configured from the plurality of spare drives, and a write unit to configured to write the save-target data into the plurality of spare drives configuring the one or more spare RAID groups in the order that the save-target data was read from the at least one data drive. | 10-15-2009 |
20090271579 | Storage subsystem and storage system - Provided is a storage subsystem that can reflect, when merging storage update information and local update information, those two kinds of update information in relevant volumes without overlapping the storage update information and the local update information. When reflecting update information in a storage subsystem | 10-29-2009 |
20090271638 | Storage system with an encryption function - To reduce the performance degradation of storage system, this invention provides a storage system comprising a disk drive and a disk controller. The disk controller provides a storage area of the disk drive to a host computer; executes a processing of switching an encryption key that is used to encrypt data stored in the logical volume from a first encryption key to a second encryption key; encrypts write data requested to be written with the second encryption key when the write request for one of storage areas within the logical volume that stores data for which switching of encryption keys has not been finished is received while the encryption key switching processing is being executed; and writes the encrypted write data in the logical volume to switch encryption keys for data stored in the storage area where the data is requested to be written by the received write request. | 10-29-2009 |
20100023847 | Storage Subsystem and Method for Verifying Data Using the Same - A subject of the invention is to propose a storage subsystem assuring high reliability and not impairing processing performance. The invention is a storage subsystem which includes a storage device including a hard disk drive and a controller for controlling an access to the storage device in response to a predetermined access command transmitted from a host computer. The storage subsystem stores, in response to a write request transmitted from the host computer, data associated with the write request together with its parity in the storage device as well as verifies the validity of the data stored in the storage device independently of a response to the write request and, when there is an abnormality in the data, repairs the abnormal data. | 01-28-2010 |
20100325339 | STORAGE SYSTEM AND METHOD FOR CONTROLLING THE SAME - Optimum load distribution processing is selected and executed based on settings made by a user in consideration of load changes caused by load distribution in a plurality of asymmetric cores. | 12-23-2010 |
20110231605 | STORAGE CONTROLLER AND STORAGE CONTROL METHOD FOR DYNAMICALLY ASSIGNING PARTIAL AREAS OF POOL AREA AS DATA STORAGE AREAS - A plurality of CPU cores each have control rights for logical storage areas of one or more types among logical storage areas of a plurality of types. As a source for an area to be assigned to the logical storage areas, a physical storage area which is common to the logical storage areas of the plurality of types is managed. Each CPU core, in the case of a data access to a logical storage area corresponding to the control rights of the CPU core, assigns an area required to store the data from the common physical storage area. | 09-22-2011 |
20110252197 | STORAGE SYSTEM - A storage group configured by a plurality of storage devices is configured by a plurality of storage sub-groups, and the respective storage sub-groups are configured from two or more storage devices. A sub-group storage area, which is the storage area of the respective storage sub-groups, is configured by a plurality of rows of sub-storage areas. A data set, which is configured by a plurality of data elements configuring a data unit, and a second redundancy code created on the basis of this data unit, is written to a row of sub-storage areas, a compressed redundancy code is created on the basis of two or more first redundancy codes respectively created based on two or more data units of two or more storage sub-groups, and this compressed redundancy code is written to a nonvolatile storage area that differs from the above-mentioned two or more storage sub-groups. | 10-13-2011 |
20120011396 | STORAGE SYSTEM - One code (a compressed redundant code) is created based on a plurality of first redundant codes, each created on the basis of a plurality of data units, and this compressed redundant code is written to a nonvolatile storage area. This compressed redundant code is used to restore either a data element constituting a multiple-failure data, or a first redundant code corresponding to the multiple-failure data, which is stored in an unreadable sub-storage area of a partially failed storage device, and to restore the data element constituting the multiple-failure data which is stored in a sub-storage area of a completely failed storage device, based on the restored either data element or first redundant code, and either another data element constituting the multiple-failure data or the first redundant code corresponding to the multiple-failure data. | 01-12-2012 |
20120072641 | SEMICONDUCTOR STORAGE DEVICE AND DATA CONTROL METHOD THEREOF - The flash memory controller compresses data in response to a write request. On condition that there is a compression effect with respect to the compressed data, the flash memory controller writes the compressed data to the base area of a physical block of a flash memory. As physical pages assigned to the physical block, the flash memory controller reduces the physical pages assigned to the base area from 102 down to 59, and increases the physical pages assigned to the update area from 26 up to 69. Therefore, it is possible to suppress exhaustion of physical pages which are assigned to the update area, to reduce the number of erases of the physical block, and to consequently prolong device operating life. | 03-22-2012 |
20120102260 | STORAGE APPARATUS AND DATA CONTROL METHOD - Data capacity efficiency is improved by de-duplicating data assigned with a code that is different for each data. | 04-26-2012 |
20120210329 | STORAGE SYSTEM AND METHOD FOR CONTROLLING THE SAME - Optimum load distribution processing is selected and executed based on settings made by a user in consideration of load changes caused by load distribution in a plurality of asymmetric cores, by using: a controller having a plurality of cores, and configured to extract, for each LU, a pattern showing the relationship between a core having an LU ownership and a candidate core as an LU ownership change destination based on LU ownership management information; to measure, for each LU, the usage of a plurality of resources; to predicate, for each LU based on the measurement results, a change in the usage of the plurality of resources and overhead to be generated by transfer processing itself; to select, based on the respective prediction results, a pattern that matches the user's setting information; and to transfer the LU ownership to the core belonging to the selected pattern. | 08-16-2012 |
20120254513 | STORAGE SYSTEM AND DATA CONTROL METHOD THEREFOR - A storage system having multiple flash memory packages including flash memory chips and package controllers for controlling access to the flash memory chips is configured such that the package controller receives from a higher-level apparatus, which sends a write request, frequency prediction information that enables prediction of an update frequency with respect to data, which is to be a write target, and when writing data for which a write request has been issued from the higher-level apparatus, control is executed such that data, which is predicted to have a relatively high update frequency based on the frequency prediction information, is preferentially stored in a physical block with the large remaining number of erases in a flash memory chip of flash memory package of the package controller, or such that data, which is predicted to have a relatively low update frequency based on the frequency prediction information, is preferentially stored in a physical block with the small remaining number of erases in a flash memory chip of the flash memory package of the package controller. | 10-04-2012 |
20120317334 | SEMICONDUCTOR STORAGE APPARATUS AND METHOD OF CONTROLLING SEMICONDUCTOR STORAGE APPARATUS - A semiconductor storage apparatus including a flash memory which provides a storage area, and a memory controller which controls the reading and writing of data from and to the flash memory, wherein the storage area of the flash memory is configured from a plurality of write areas, and wherein the memory controller divides the data into a size corresponding to the write area, and changes the starting location of writing the data each time the divided data is written into the write area. | 12-13-2012 |
20130086304 | STORAGE SYSTEM COMPRISING NONVOLATILE SEMICONDUCTOR STORAGE MEDIA - Logical-physical translation information comprises information denoting the corresponding relationships between multiple logical pages and multiple logical chunks forming a logical address space of a nonvolatile semiconductor storage medium, and information denoting the corresponding relationships between the multiple logical chunks and multiple physical storage areas. Each logical page is a logical storage area conforming to a logical address range. Each logical chunk is allocated to two or more logical pages of multiple logical pages. Two or more physical storage areas of multiple physical storage areas are allocated to each logical chunk. A controller adjusts the number of physical storage areas to be allocated to each logical chunk. | 04-04-2013 |
20130086305 | NONVOLATILE SEMICONDUCTOR STORAGE SYSTEM - A nonvolatile semiconductor storage system has multiple nonvolatile semiconductor storage media, a control circuit having a media interface group (one or more interface devices) coupled to the multiple nonvolatile semiconductor storage media, and multiple switches. The media interface group and the multiple switches are coupled via data buses, and each switch and each of two or more nonvolatile chips are coupled via a data bus. The switch is configured so as to switch a coupling between a data bus coupled to the media interface group and a data bus coupled to any of multiple nonvolatile chips that are coupled to this switch. The control circuit partitions write-target data into multiple data elements, switches a coupling by controlling the multiple switches, and distributively sends the multiple data elements to multiple nonvolatile chips. | 04-04-2013 |
20130091320 | STORAGE SYSTEM AND STORAGE METHOD - A storage system comprises a storage comprising a nonvolatile storage medium, and a storage control apparatus for inputting/outputting data to/from the storage. The storage control apparatus comprises a memory for storing management information, which is information used in inputting/outputting data to/from the storage, and a control part for controlling access to the storage. The control part stores the management information, which is stored in the memory, in the storage as a base image, and when the management information is updated subsequent to the base image being stored in the storage, creates a journal comprising information related to this update, and stores the journal in the storage as a journal group which is configured from multiple journals. | 04-11-2013 |
20130151770 | REMOTE COPY SYSTEM AND REMOTE COPY CONTROL METHOD - A first storage system comprises a first RAID group comprising multiple first storage devices, which constitute the basis of a first logical volume. A second storage system comprises a second RAID group comprising multiple second storage devices, which constitute the basis of a second logical volume. The RAID configuration of the first RAID group and the RAID configuration of the second RAID group are the same, and the type of a compression/decompression function of the respective first storage devices and the type of a compression/decompression function of the respective second storage devices are the same. Compressed data is read from a first storage device without being decompressed with respect to the data inside a first logical volume, and the read compressed data is written to a second storage device, which is in the same location in RAID in the second RAID group as the location in RAID of this first storage device. | 06-13-2013 |
20130205070 | STORAGE APPARATUS PROVIDED WITH A PLURALITY OF NONVOLATILE SEMICONDUCTOR STORAGE MEDIA AND STORAGE CONTROL METHOD - A storage apparatus is provided with a plurality of nonvolatile semiconductor storage media and a storage controller that is a controller that is coupled to the plurality of semiconductor storage media. The storage controller identifies a first semiconductor storage unit that is at least one semiconductor storage media and a second semiconductor storage unit that is at least one semiconductor storage media and that is provided with a remaining length of life shorter than that of the first semiconductor storage unit based on the remaining life length information that has been acquired. The storage controller moreover identifies a first logical storage region for the first semiconductor storage unit and a second logical storage region that is provided with a write load higher than that of the first logical storage region for the second semiconductor storage unit based on the statistics information that indicates the statistics that is related to a write for every logical storage region. The storage controller reads data from the first logical storage region and the second logical storage region, and writes data that has been read from the first logical storage region to the second logical storage region and/or writes data that has been read from the second logical storage region to the first logical storage region. | 08-08-2013 |
20130232302 | STORAGE SYSTEM AND METHOD FOR CONTROLLING THE SAME - Optimum load distribution processing is selected and executed based on settings made by a user in consideration of load changes caused by load distribution in a plurality of asymmetric cores, by using: a controller having a plurality of cores, and configured to extract, for each LU, a pattern showing the relationship between a core having an LU ownership and a candidate core as an LU ownership change destination based on LU ownership management information; to measure, for each LU, the usage of a plurality of resources; to predicate, for each LU based on the measurement results, a change in the usage of the plurality of resources and overhead to be generated by transfer processing itself; to select, based on the respective prediction results, a pattern that matches the user's setting information; and to transfer the LU ownership to the core belonging to the selected pattern. | 09-05-2013 |
20130311707 | STORAGE CONTROL APPARATUS AND STORAGE CONTROL METHOD - A storage control apparatus comprises a storage unit, an association unit, and an execution unit. The storage unit stores association information showing multiple physical chunks which are configured in a physical address space of a nonvolatile semiconductor memory, multiple logical storage areas which are configured in a logical address space of the nonvolatile semiconductor memory, multiple logical chunks which are respectively associated with the multiple physical chunks, and an association between a logical storage area and a logical chunk. The association unit changes the association by changing the association information in accordance with a state of the nonvolatile semiconductor memory, and identifies based on the association information a physical storage area corresponding to a logical storage area specified in an input/output request from a computer. The execution unit executes the input/output request with respect to the identified physical storage area. | 11-21-2013 |
20130311854 | SEMICONDUCTOR STORAGE DEVICE AND CONTROL METHOD OF NONVOLATILE MEMORY - A memory controller adds the redundant information that is used to correct an error for each of data of a predetermined length and stores the data into the nonvolatile memory in the case in which data is written to the nonvolatile memory, the memory controller reads data and the redundant information that has been added to the data from the nonvolatile memory in the case in which data is read from the nonvolatile memory, and the memory controller corrects an error based on the redundant information in the case in which the data includes an error. The memory controller stores data that is in a basic unit that is a unit of an error correction configured by the data of a predetermined length and the redundant information that is added to the data of a predetermined length into a plurality of predetermined pages in a dispersed manner. | 11-21-2013 |
20140025990 | STORAGE SYSTEM AND DATA MANAGEMENT METHOD - Storage system comprises a second storage apparatus, which is coupled to multiple first storage apparatuses and is of a different type from the first storage apparatuses, and a first control device, which exists either inside or outside of the second storage apparatus. Row of stripes comprising multiple data elements obtained by segmenting a prescribed data unit, and a redundancy code for rebuilding the data elements, is distributively stored in multiple first storage apparatuses, which are more numerous than the total number of stripe data elements, which are either the data elements or redundancy code, in the row of stripes. The row of stripes is configured to enable the rebuilding of the stripe data elements even when a failure has occurred in up to a prescribed allowable number, which is two or more, of the first storage apparatuses storing the stripe data elements of the relevant row of stripes. | 01-23-2014 |
20140115235 | CACHE CONTROL APPARATUS AND CACHE CONTROL METHOD - A cache control apparatus comprises a primary cache part, a secondary cache part for caching data destaged from the primary cache part, and a controller connected to the primary cache part and to the secondary cache part. The secondary cache part has a first storage part and a second storage part having a lifetime longer than that of the first storage part. The controller determines whether the data destaged from the primary cache part is to be stored in the first storage part or the second storage part in the secondary cache part, based on a use state indicating whether or not the data has been updated, and stores the data in the first storage part or the second storage part determined. | 04-24-2014 |
20140189203 | STORAGE APPARATUS AND STORAGE CONTROL METHOD - A cache memory (CM) in which data, which is accessed with respect to a storage device, is temporarily stored is coupled to a controller for accessing the storage device in accordance with an access command from a higher-level apparatus. The CM comprises a nonvolatile semi-conductor memory (NVM), and provides a logical space to the controller. The controller is configured to partition the logical space into multiple segments and to manage these segments, and to access the CM by specifying a logical address of the logical space. The CM receives the logical address-specified access, and accesses a physical area allocated to a logical area, which belongs to the specified logical address. A first management unit, which is a unit of a segment, is larger than a second management unit, which is a unit of an access performed with respect to the NVM. The capacity of the logical space is larger than the storage capacity of the NVM. | 07-03-2014 |
20140195722 | STORAGE SYSTEM WHICH REALIZES ASYNCHRONOUS REMOTE COPY USING CACHE MEMORY COMPOSED OF FLASH MEMORY, AND CONTROL METHOD THEREOF - The first storage apparatus provides a primary logical volume, and the second storage apparatus has a secondary logical volume. When the first storage apparatus receives a write command to the primary logical volume, a package processor in a flash package allocates first physical area in the flash memory chip to first cache logical area for write data and stores the write data to the allocated first physical area. And when the package processor receives journal data creation command form the processor, allocates the first physical area to second journal area for journal data without storing journal data corresponding to the write data. | 07-10-2014 |
20140250271 | REMOTE COPY SYSTEM AND REMOTE COPY CONTROL METHOD - A first storage system comprises a first RAID group comprising multiple first storage devices, which constitute the basis of a first logical volume. A second storage system comprises a second RAID group comprising multiple second storage devices, which constitute the basis of a second logical volume. The RAID configuration of the first RAID group and the RAID configuration of the second RAID group are the same, and the type of a compression/decompression function of the respective first storage devices and the type of a compression/decompression function of the respective second storage devices are the same. Compressed data is read from a first storage device without being decompressed with respect to the data inside a first logical volume, and the read compressed data is written to a second storage device, which is in the same location in RAID in the second RAID group as the location in RAID of this first storage device. | 09-04-2014 |
20140281064 | COMPOUND STORAGE SYSTEM AND STORAGE CONTROL METHOD - A shared device unit, which comprises a storage device, is coupled to a plurality of storage systems. The shared device unit provides a plurality of storage areas, which are based on the storage device, to the plurality of storage systems. Each storage system stores allocation management information which comprises an ID of a storage area provided to thereof among the plurality of storage areas, and provides the storage area corresponded to the ID included in the allocation management information to the host computer coupled thereto among the plurality of host computers. | 09-18-2014 |
20140297697 | DATABASE SYSTEM AND DATABASE MANAGEMENT METHOD - The method includes (A) acquiring storage location information that can identify a volume that stores data and access type information, (B) acquiring volume management information that can identify the storage unit that stores the volume, (C) identifying the volume of data to be accessed, identifying the storage unit storing the volume, and identifying the storage method of the storage unit, (D) identifying the type of access to the data to be accessed, (E) determining whether the data needs to be moved to another storage unit of a different storage method based on the storage method and the type of access, and (F) giving an indication of moving the data if it is determined that the data needs to be moved in (E). | 10-02-2014 |
20140304451 | COMPUTER SYSTEM AND MANAGEMENT SYSTEM - A storage system, which comprises multiple memory cells and a storage controller, wherein the storage controller manages cell mode information, which either directly or indirectly denotes the number of bits to be stored in multiple memory cells. The cell mode information can be changed in accordance with a request from a management system. | 10-09-2014 |
20140321208 | DE-DUPLICATION IN FLASH MEMORY MODULE - Data capacity efficiency is improved by de-duplicating data assigned with a code that is different for each data. A storage apparatus comprising a flash memory control device equipped with one or more flash memory modules, wherein the flash memory module comprises at least one flash memory chip for providing a storage area, and a controller for controlling writing/reading of data including user data and a guarantee code accompanying the user data to and from the storage area provided by the flash memory chip, wherein the controller respectively divides a plurality of the data having the common user data into the user data and the guarantee code, stores one of the user data in an area of a predetermined unit of the storage area, and links and stores each of the guarantee codes accompanying the plurality of user data in an area of a predetermined unit of the storage area. | 10-30-2014 |