| Patent application number | Description | Published |
|---|
| 20080201542 | DATA MIGRATING METHOD TAKING END TIME INTO CONSIDERATION - There is provided a data migrating method including the steps of: calculating, in a case where data stored in a volume is migrated to another volume, a required period of time for migrating the data based on a size of data to be migrated and volume configuration information on the volume in which the migrated data is stored and the volume to which the data is to be migrated; determining a start time at which the data migration starts to generate a volume migration plan; setting a priority of the generated volume migration plan; prioritizing, in a case where a periods of time during which the generated volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, and changing the start time of at least one of those volume migration plans having a lower priority. | 08-21-2008 |
| 20080243956 | MANAGEMENT DEVICE AND METHOD FOR STORAGE DEVICE EXECUTING CDP-BASED RECOVERY - A management device of a storage device that executes CDP-based recovery comprises: a data protection term acquisition section that acquires a data protection term which is a term in which recovery of a data volume is ensured from a predetermined duration for which a predetermined time is a reference point; and a control section that executes control using the data protection term. | 10-02-2008 |
| 20080270608 | COMPUTER SYSTEM - The Computer System consists of components including more than one Computer and Storage Subsystem to which more than one Computer are connected. The Storage Subsystem is equipped with more than one Storage Unit, Management Table registering information to manage Storage Units accessible by each of the Computers and Controller to control accesses by more than one Computer to more than one Storage Unit. The controller controls the accesses according to the information set in the Management Table when the Storage Unit is accessed by the Computer. | 10-30-2008 |
| 20080276061 | METHOD AND COMPUTER FOR DETERMINING STORAGE DEVICE - A computer specifies the configuration of a first storage device by referencing first configuration information relating to the configuration of a first storage system including the first storage devices, specifies one or more storage medium access performances corresponding to the first storage device by referencing the storage medium performance information, and calculates a first access performance index of the first storage device based on one or more specified storage medium access performances. The computer then references storage medium performance information and second configuration information relating to the configuration of a second storage system including a second storage device, and determines a second storage device having an access performance index that is at least equal to the calculated first storage access performance index. | 11-06-2008 |
| 20080276120 | Volume and failure management method on a network having a storage device - A SAN manager acquires configuration information from devices constituting a SAN and produces a corresponding relationship between a host computer and a virtual volume (virtual volume mapping) and a corresponding relationship between the host computer and a real volume (real volume mapping). Based on those pieces of mapping information, the SAN manager outputs a corresponding relationship between virtual and real volumes. Meanwhile, the failure notification messages received from the in-SAN devices are construed to detect and output an influence of the failure upon the access to a real or virtual volume. Furthermore, when receiving a plurality of failure notifications from the devices connected to the SAN, the plurality of failure notifications are outputted with an association based on the corresponding relationship between real and virtual volumes. | 11-06-2008 |
| 20080288795 | METHOD AND SYSTEM FOR REDUCING POWER CONSUMPTION OF STORAGE SYSTEM SERVING AS TARGET DURING REMOTE COPYING EMPLOYING JOURNAL - A second storage system comprises a restore control unit for controlling restoration processing, in which a data element in a journal stored in a journal storage area is written into a secondary logical volume, and a storage device control unit for controlling a storage device in the second storage system. The restore control unit is provided with a function for suspending the restoration processing. A first value indicating the usage condition of the journal storage area in the second storage system is obtained, and the restore control unit suspends the restoration processing in accordance with the obtained first value. The storage device control unit then executes power saving on a storage device relating to the secondary logical volume. | 11-20-2008 |
| 20090013008 | Computer System, Managing Computer and Recovery Management Method - The invention provides a method for computing the appropriate capacity of a journal volume based on the operating patterns of backup and recovery performed by the user, and composing a recovery system that enables recovery to be performed in a short time using journals. The invention provides a computer system comprising a storage system | 01-08-2009 |
| 20090013012 | JOURNAL MANAGEMENT METHOD IN CDP REMOTE CONFIGURATION - A first storage system specifies a journal to be transferred in accordance with a time period for retaining write data in update (write) units of data in a second storage system, and transfers this journal to the second storage system. Data for which the retention period has expired is transferred by selecting write data by address. | 01-08-2009 |
| 20090013137 | STORAGE SYSTEM AND POWER CONSUMPTION REDUCTION METHOD, AND INFORMATION PROCESSING APPARATUS - In a storage system including: plural information processing apparatuses each of which copies data sent from a host computer to create archive data in accordance with redundancy sent from the host computer; and a storage apparatus having physical disks that store the archive data, the storage apparatus includes a management unit that manages power state information that is information on whether or not the power state of each of the physical disks is “on,” and the information processing apparatuses each include an acquisition unit that acquires the power state information managed by the management unit and a determination unit that determines an information processing apparatus targeted for reading or writing the archive data from among the information processing apparatuses based on the power state information acquired by the acquisition unit. | 01-08-2009 |
| 20090031320 | Storage System and Management Method Thereof - A storage system comprises a first storage apparatus having a volume for a host computer, a second storage apparatus connected to the first storage apparatus, and having a volume having a pair relationship with a first volume in the first storage apparatus, and a management apparatus connected to the first storage apparatus and the second storage apparatus. The management apparatus includes a user interface for setting an attribute of a function related to the volume of the first storage apparatus and an attribute of a function related to the volume of the second storage apparatus. The management apparatus compares the attribute of the function related to the first volume and the attribute of the function related to the second volume, and outputs the result of the comparison to the user interface. | 01-29-2009 |
| 20090044035 | Management apparatus, management method and storage management system - A management apparatus, a management method, and a storage management system that more specifically manage power consumption, making it easy to analyze problems relating to power consumption or properly relocate data are provided. | 02-12-2009 |
| 20090063797 | BACKUP DATA ERASURE METHOD - A computer system comprises a storage subsystem, a host computer and a management computer, and stores catalogue information containing correspondence between a first volume for data reading or writing and a second volume for storing a copy of the data stored in the first volume. The management computer requests the storage subsystem to erase the data stored in the first volume upon reception of an erasure request of the data stored in the first volume. The storage subsystem erases the data stored in the first volume. The management computer specifies a second volume for storing the copy of the data stored in the first volume based on the catalogue information. The storage subsystem erases data stored in the specified second volume. Thus, security risks are reduced by erasing data regarding the data when the data stored in the volume is erased. | 03-05-2009 |
| 20090063872 | MANAGEMENT METHOD FOR ARCHIVE SYSTEM SECURITY - Creating a plaintext index from a text that is extracted from a file presents the risk of a leak of confidential information from the created index. To address this problem, provided is a computer system which has a computer, a storage subsystem coupled to the computer, and a network coupling the computer and the storage subsystem. The computer has an interface coupled to the network, a first processor coupled to the interface, and a memory coupled to the first processor. The storage subsystem has a disk device which stores data. A storage area of the disk device is divided into a plurality of storage areas including, at least, a first storage area and a second storage area. The first processor reads a part of data stored in the first storage area, encrypts the part of data read from the first storage area when the data stored in the first storage area is judged as encrypted data, and writes the encrypted part of data in the second storage area. | 03-05-2009 |
| 20090070390 | RECOVERY METHOD USING CDP - 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. | 03-12-2009 |
| 20090077557 | METHOD AND COMPUTER FOR SUPPORTING CONSTRUCTION OF BACKUP CONFIGURATION - For a storage system which holds backup data of a first data storage extent in one or more second data storage extents in use of a first backup method, a backup status in a first backup method in a prescribed period is acquired and a first backup performance in a first backup configuration is computed based on this backup status. Meanwhile, a second backup performance in a second backup configuration is estimated based on a prescribed assumption in a prescribed period. Information is outputted based on the computed first backup performance and the estimated second backup performance. | 03-19-2009 |
| 20090089499 | METHOD OF MANAGING STORAGE CAPACITY IN A STORAGE SYSTEM, A STORAGE DEVICE AND A COMPUTER SYSTEM - A capacity management method of managing a capacity of a storage unit of each storage in a computer system having a plurality of storage devices each having one or more storage units each providing one or more storage areas. The method includes the steps of: detecting a storage area relation between a first storage area and a second storage area; and calculating an estimated capacity necessary for the storage unit in accordance with a detection result. | 04-02-2009 |
| 20090125692 | BACKUP SYSTEM AND METHOD - A storage system, upon receiving a marker from a host computer, executes a generation determination process for determining a generation of a first logical volume that is used by a host computer, and writes information related to the generation determined in this generation determination process to a physical storage device and/or a memory. A backup controller determines whether or not any data or a specified file and/or folder inside the first logical volume of the immediately preceding generation has changed, and when the result of this determination is affirmative, sends a marker insert indication, which induces the issuance of a marker, to the host computer, and when the result of the determination is negative, does not send the marker insert indication to the host computer. | 05-14-2009 |
| 20090138667 | METHOD AND APPARATUS FOR CONFIGURATION MANAGEMENT OF COMPUTER SYSTEM - A management computer collects, from a storage subsystem via a management network, path definition information including the contents of a security setting made to a path accessible to a volume in the storage subsystem, and when the volume in the storage subsystem is an original volume having a replica volume, replica definition information of the original volume. Based on the replica configuration information thus collected from the storage subsystem, the replica relationship between the volumes is to be grasped. Then, based on the path definition information also collected from the storage subsystem, the contents of the path security setting are verified for the volumes under the same replica relationship, and the verification result is output. In such a structure, consistency verification can be easily done for the security setting of the original and replica volumes. | 05-28-2009 |
| 20090157768 | COMPUTER SYSTEM AND DATA LOSS PREVENTION METHOD - A primary storage system and a secondary storage system are connected via a copy network in this computer system. This computer system includes a measurement unit for measuring an update data input amount to be input into the primary update data storage area, a calculation unit for calculating a recovery point in each given period of time based on the measured update data input amount and the band of the copy network, and a comparison unit for comparing the calculated recovery point and a target recovery point to be pre-set as a target value for recovering the update data. | 06-18-2009 |
| 20090172144 | ID COLLECTION AND MANAGEMENT APPARATUS, METHOD AND PROGRAM OF COMPUTER - An ID collection and management apparatus which manages identifiers of computers in a computer system including said computers and a storage system which provides said computers with a storage volume, including: a first ID acquisition unit which acquires first IDs which are IDs of a data port for said computers to transmit/receive data with said storage volume; a second ID acquisition unit which acquires second IDs to be recognized as the IDs of said computers by said storage system; and an ID management unit which manages said first IDs and said second IDs in a corresponding manner for each of said computers; wherein a first communication protocol for communication with said computers is different from a second communication protocol for communication with said storage system, wherein the first IDs are based on requirements of the first communication protocol, and the second IDs are based on requirements of the second communication protocol, such that the first IDs and second IDs differ from each other. | 07-02-2009 |
| 20090187721 | Computer System, Management Computer, and Volume Allocation Change Method of Management Computer - A computer system to prevent intervention and falsification by setting encrypted transfer between a host computer and a first storage device that provides a virtual volume and between the first storage device and second and third storage devices that provide a real volume corresponding to the virtual volume. A management computer specifies the second and third storage device that provide the real volume corresponding to the virtual volume by providing a volume corresponding to the virtual volume used by a host computer in which encrypted transfer becomes necessary, and setting the encrypted transfer to communication between the first storage device and the second and third storage devices, makes a reconnection thereof, and also sets the encrypted transfer to an I/O port used for the communication with the host computer in the first storage device. | 07-23-2009 |
| 20090204618 | Storage system - A storage system capable of identifying all volumes to be audited is provided. | 08-13-2009 |
| 20090216973 | COMPUTER SYSTEM, STORAGE SUBSYSTEM, AND DATA MANAGEMENT METHOD - To prevent, when data is erased from a storage system that stores differential of updated data, a large amount of differential data from being created, a storage subsystem provides a first storage area which stores data, and includes a second storage area which stores a replication of data stored in the first storage area. When the data stored in the first storage area is updated, the data is replicated to the second storage area before the data is updated. When a request to erase the data stored in the first storage area is received, replication of unupdated data to the second storage area is suspended and the data stored in the first storage area is erased based on the request to erase the data. | 08-27-2009 |
| 20090265522 | ARRANGEMENTS CHANGING AN OPERATION AUTHORITY RESPONSIVE TO ATTRIBUTE CHANGES - A computer system including a copy source volume and a copy target volume which may be selectably PAIRED or SPLIT. User management information stores: an entry indicating that a first user is permitted to effect a PAIR operation and a PATH operation; and, an entry indicating that a second user is permitted to effect a PATH operation. Operation management information indicates permitted PATH and PAIR operations in relation to each user and a volume's PAIR or SPLIT status, and stores: an entry indicating that the first user is permitted to effect the PAIR operation in which the PAIR status is PAIR, or is SPLIT WITH BACKUP DISABLED; and, an entry indicating that the second user is permitted to effect the PATH operations in which the PAIR status is SPLIT WITH BACKUP ENABLED. PAIR management information stores the PAIR status and the BACKUP ENABLED or DISABLED status. | 10-22-2009 |
| 20090287878 | STORAGE APPARATUS USING FLASH MEMORY - For a storage apparatus in which flash memory disks and hard disks coexist, high-density mounting of flash memory modules is achieved. A storage apparatus in accordance with the present invention includes flash memories and a storage controller. A second storage apparatus including magnetic disks is connected to the storage apparatus. For creation of a logical volume, the storage controller can form a storage area using a flash memory or a magnetic disk. When an input/output request is issued from a host computer, if a storage area is formed with a flash memory, the storage controller directly accesses the flash memory to handle the input/output request. When the storage apparatus defines a storage area formed with a flash memory, the storage apparatus defines the storage area by adding up the capacity of a storage area to be provided for the host computer and a substitute area capacity determined in consideration of restrictions imposed on the number of times of deletion of the flash memory. | 11-19-2009 |
| 20090300285 | COMPUTER SYSTEM, STORAGE SYSTEM AND METHOD FOR EXTENDING VOLUME CAPACITY - The object of the present invention is to prevent distribution of a storage range to a volume from an inappropriate disk drive comparing with use of the volume as a result of an automatic extension of a volume capacity. A computer system has a storage system including a physical storage device, a host computer, and a management computer. The storage system includes a plurality of kinds of physical storage devices physically dividing into two segments or more the volume and records as constitution information the correspondence between each segment and the volume using the segment. And the storage system records the kind of physical storage device to be allocated to the volume and selects the physical storage device according to the kind of stored physical storage device for allocation of the segment when the host computer performs an I/O access to the volume. | 12-03-2009 |
| 20090300316 | COMPUTER SYSTEM, MANAGEMENT COMPUTER AND STORAGE SYSTEM, AND STORAGE AREA ALLOCATION AMOUNT CONTROLLING METHOD - To provide a computer system, a management computer and a storage system, and a storage area allocation amount controlling method for improving I/O performance of the host computer. In a computer system comprising a storage system comprising one or more storage devices with storage areas, a host computer which uses a storage area of the storage device, and a management computer for dynamically allocating the storage area in response to an input/output request from the host computer; wherein the management computer monitors dynamic allocation of a real storage area to a storage area in the storage system, and calculates allocation increment amount to the allocated storage area based on the allocation frequency and the total amount of allocation. | 12-03-2009 |
| 20090307391 | CONFIGURATION MANAGEMENT APPARATUS AND METHOD - To migrate a configuration that an old storage device has to a new storage device. A new storage device obtains a configuration of an old storage device, by using a migration manager, and prepares a logical volume definition of the new storage device based on a logical volume definition in the configuration. Also, based a cache allocation definition in the configuration and cache capacity of the new storage device, a cache allocation definition of the new storage device is prepared. Further, based on a port bandwidth allocation definition in the configuration and bandwidth capacity of a port of the new storage device, a port bandwidth allocation definition of the new storage device is prepared. The prepared logical volume definition, cache allocation definition and port bandwidth allocation definition are set up in a configuration of the new storage device. | 12-10-2009 |
| 20090319751 | STORAGE AREA DYNAMIC ASSIGNMENT METHOD - A storage system allocates a data storage area in response to an access request from a first computer if the capacity of a first physical storage device configuring a first logical storage area, provided to the first computer, is equal to or lower than a predetermined threshold. The storage system associates the first logical storage area with another physical storage device, which is different from the first physical storage device associated with a second logical storage area provided to the first computer and a second computer, and allocates a data storage area from the another physical storage device if the capacity of the first physical storage device associated with the first logical storage area exceeds the predetermined threshold. | 12-24-2009 |
| 20100011184 | MANAGEMENT METHOD AND A MANAGEMENT SYSTEM FOR VOLUME - It is made possible to update information registered in a database of iSNS, SLP and the like in response to a configurational change in a storage device, and for a host computer to discover a disk volume. In response to changes in contents of operation to alter a storage configuration such as in creating or deleting a volume or LUN, contents of the alteration are reflected in the database of iSNS or SLP. Also, in response to a change in setting of LUN masking, a discovery domain of iSNS or attribute values of SLP are updated so that the host computer can discover the disk volume. Also, objects and services are reregistered periodically according to a registration period of iSNS or lifetime of SLP to prevent registered contents from expiring. | 01-14-2010 |
| 20100023713 | Archive system and contents management method - There is provided an archive system that performs processing on arbitrary contents, the system including a grouping section that groups multiple archive nodes included in a cluster, a policy section that defines a requirement for performing processing on the arbitrary contents, and a control section that determines a group for performing processing on the arbitrary contents based on the group information about the definition of the grouping of the multiple archive nodes and the requirement and controls the determined group to perform the processing. | 01-28-2010 |
| 20100042797 | COMPUTER SYSTEM, DATA MIGRATION MONITORING METHOD AND DATA MIGRATION MONITORING PROGRAM - A management computer monitors an allocated capacity of a source virtual volume and an allocated capacity of a virtual pool having a storage area allocated to a destination virtual volume in a storage, judges whether the allocated capacity of the source virtual volume can be covered in the virtual pool or not, and informs the user of a result that data migration fails when the allocated capacity of the source virtual volume cannot be covered. When the allocated capacity of the source virtual volume cannot be covered, the management computer uses another storage area to increase the capacity of the virtual pool. Accordingly, when data migration is performed between the virtual volumes, capacities of physical areas allocated to the source virtual volume and the destination virtual volume can be grasped so that the data migration can be performed accurately between the source virtual volume and the destination virtual volume. | 02-18-2010 |
| 20100070731 | STORAGE SYSTEM HAVING ALLOCATION-ON-USE VOLUME AND POWER SAVING FUNCTION - A storage system includes physical memory devices, pool volumes, including real areas, an allocation-on-use (AOU) volume including virtual areas, and a controller allocating a non-allocated real area in a pool including the pool volumes to a virtual area corresponding to an address specified by a writing command when no real area is allocated to the virtual area, and writing data corresponding to the received writing command to the allocated real area. The controller moves data stored in all the real areas in a first pool volume allocated to the AOU volume to a second pool volume, and changes a power consuming status of the physical memory device constituting the first pool volume to a power saving mode after the data has been moved. | 03-18-2010 |
| 20100088465 | CONTROL DEVICE OF A STORAGE SYSTEM COMPRISING STORAGE DEVICES OF A PLURALITY OF TYPES - A control device of a storage system including a CPU which receives input information including at least a size and an archive deadline of data which is stored in storage devices; wherein data management information includes a write threshold value regarding one type of storage devices, the write threshold value indicating a write limit number to the one type of storage devices, wherein the CPU: selects a storage device which stores data corresponding to the information which is input to an input device, based on the information which is input to the input device and the data management information which is stored in the memory; CPU stores to the selected storage device, the data corresponding to the information which is input to the input device; and, registers to the data management information in the memory, at least one of the information which is input to the input device. | 04-08-2010 |
| 20100122125 | VOLUME AND FAILURE MANAGEMENT METHOD ON A NETWORK HAVING A STORAGE DEVICE - A SAN manager acquires configuration information from devices constituting a SAN and produces a corresponding relationship between a host computer and a virtual volume (virtual volume mapping) and a corresponding relationship between the host computer and a real volume (real volume mapping). Based on those pieces of mapping information, the SAN manager outputs a corresponding relationship between virtual and real volumes. Meanwhile, the failure notification messages received from the in-SAN devices are construed to detect and output an influence of the failure upon the access to a real or virtual volume. Furthermore, when receiving a plurality of failure notifications from the devices connected to the SAN, the plurality of failure notifications are outputted with an association based on the corresponding relationship between real and virtual volumes. | 05-13-2010 |
| 20100125763 | VOLUME AND FAILURE MANAGEMENT METHOD ON A NETWORK HAVING A STORAGE DEVICE - Provided is an environment that storage device configuration management can be efficiently done in a data center having a virtualization device. A SAN manager acquires configuration information from a device constituting a SAN and prepares a correspondence relationship between a host computer and a virtual volume in the SAN, and a corresponding relationship between the host computer and a real volume, depending upon the acquired information. Based on the corresponding relationship, the SAN manager outputs a correspondence relationship of between virtual and real volumes. Meanwhile, by interpreting a failure-notification message received from the devices of the SAN, detected and outputted is an influence upon an access to a real or virtual volume as to the failure. Furthermore, when a plurality of failure notifications are received from the devices connected to the SAN, a plurality of failure notifications are associatively outputted depending upon a correspondence relationship between real and virtual volumes. | 05-20-2010 |
| 20100274883 | CONFIGURATION MANAGEMENT METHOD FOR COMPUTER SYSTEM INCLUDING STORAGE SYSTEMS - Responsive to a manipulation a storage administrator performs, the authority to manage the physical configuration of a storage system is either given or not given to the storage administrator. Specifically, a volume allocation program installed in a management computer gives the storage administrator the authority to manage the physical configuration of a storage system including a created volume, responsive to creation of a volume. A volume un-allocation program installed in the management computer verifies responsive to un-allocation of a volume whether the storage administrator is not given the authority to manage the physical configuration of the storage system including the un-allocated volume. Thus, by use of the two programs, the storage administrator can manage both a physical configuration and a logical configuration exclusive of other storage administrators. | 10-28-2010 |
| 20100325378 | DATA MIGRATING METHOD TAKING END TIME INTO CONSIDERATION - There is provided a data migrating method including the steps of: calculating, in a case where data stored in a volume is migrated to another volume, a required period of time for migrating the data based on a size of data to be migrated and volume configuration information on the volume in which the migrated data is stored and the volume to which the data is to be migrated; determining a start time at which the data migration starts to generate a volume migration plan; setting a priority of the generated volume migration plan; prioritizing, in a case where a periods of time during which the generated volume migration plan is executed and a period of time during which an existing volume migration plan is executed are overlapped with each other, and changing the start time of at least one of those volume migration plans having a lower priority. | 12-23-2010 |
| 20110047321 | STORAGE PERFORMANCE MANAGEMENT METHOD - The computer system having a storage subsystem for storing data in a logical storage extent created in a physical storage device constituted of a physical storage medium, a host computer for reading/writing data from/to the logical storage extent via a network, and a management computer for managing the storage subsystem. The management computer records components of the storage subsystem, a connection relation between the components included in a network path, a correlation between the logical storage extent and the components, and a load of each component, specifies components included in a leading path from an interface through which the storage subsystem is connected with the network to the physical storage medium, measures loads of the specified components to improve performance. | 02-24-2011 |
| 20110153967 | STORAGE AREA DYNAMIC ASSIGNMENT METHOD - A storage system allocates a data storage area in response to an access request from a first computer if the capacity of a first physical storage device configuring a first logical storage area, provided to the first computer, is equal to or lower than a predetermined threshold. The storage system associates the first logical storage area with another physical storage device, which is different from the first physical storage device associated with a second logical storage area provided to the first computer and a second computer, and allocates a data storage area from the another physical storage device if the capacity of the first physical storage device associated with the first logical storage area exceeds the predetermined threshold. | 06-23-2011 |
| 20110167215 | Storage System Comprising RAID Group - A pool that is a storage area group composed of a plurality of real pages based on a plurality of RAID groups is managed. The storage system carries out the rebuild processing that includes the steps of copying each of data that has been stored into all allocated real pages among all real pages based on a specific RAID group to an unallocated real page based on at least one RAID group separate from the specific RAID group, allocating a real page of each copy destination to each virtual page of an allocated destination of an allocated real page of each copy source, and canceling an allocation of an allocated real page of each copy source to a virtual page. | 07-07-2011 |
| 20110167220 | STORAGE SYSTEM FOR HOLDING A REMAINING AVAILABLE LIFETIME OF A LOGICAL STORAGE REGION - The storage system includes a plurality of first disk devices, a plurality of second disk devices, in which a lifetime of the plurality of second disk devices is different from a lifetime of the plurality of first disk devices, and a controller coupled to the plurality of first disk devices and the plurality of second disk devices. The controller configures a first logical unit by the plurality of first disk devices and a second logical unit by the plurality of second disk devices, provides the first and the second logical units to a host computer, and manages a first remaining available time of the first logical unit and a second remaining available time of the second logical unit, on logical unit basis. | 07-07-2011 |
