| Patent application number | Description | Published |
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| 20080307021 | COMPUTER SYSTEM, MANAGEMENT COMPUTER, STORAGE SYSTEM, AND BACKUP MANAGEMENT METHOD - A computer system includes a host computer; a storage system for obtaining a snapshot, at a specific point in time, of a data volume, storing data written to the data volume after the specific point in time as a journal, and applying the journal to the snapshot for data recovery; and a management computer. In the computer system, the management computer instructs the storage system to determine whether data at a recovery point after a recovery point of the latest snapshot can be recovered within a specific period of time and to apply, if it has been determined that the data cannot be recovered within the specific period of time, a journal to the latest snapshot to update the latest snapshot to a new snapshot in such a manner that the data can be recovered within the specific period of time | 12-11-2008 |
| 20090024871 | Failure management method for a storage system - Provided is a method of performing backup and recovery of data by using journaling, and performing management upon occurrence of a failure. The method includes: a first step of setting a recovery point indicative of the given time; a second step of creating an information of correspondence between the snapshot and the journal data which is required to restore data at the set recovery point time; a third step of detecting the occurrence of failure of the disk drive; and a fourth step of detecting the recovery point at which data cannot be restored due to the failure of the disk drive. | 01-22-2009 |
| 20090119467 | STORAGE SYSTEM AND STORAGE SUBSYSTEM - In the storage system, a storage apparatus includes a disk device for storing write data from a host computer as a primary volume and copied data of write data as a secondary volume, and a disk controller for collecting and managing status information of a plurality of copy pairs from the disk device with a primary volume and a secondary volume as a single copy pair. The disk controller monitors the status information of the plurality of copy pairs according to the status of failure, and, upon receiving a status notification command, transfers the detailed information concerning a copy pair as the status information of the copy pair subject to a failure, and flag information showing the overall status of all other copy pairs as status information of such other copy pairs. | 05-07-2009 |
| 20090271445 | Storage system and method of changing monitoring condition thereof - The management burden of a replication administrator is alleviated and the monitoring burden is reduced in a storage system. In a large-scale storage system configured across a plurality of sites, a management computer managing the storage system collects configuration information of a volume group such as the copy pair status information from a host computer of the respective sites including a primary site and a remote site, and analyzes the collected information. When a failure or a disaster occurs and the primary site and the remote site are switched and the management computer detects a change in the configuration of the volume group, and appropriate switches the monitoring configuration upon determining the configuration of the detected change. | 10-29-2009 |
| 20100077162 | METHOD OF CONSTRUCTING REPLICATION ENVIRONMENT AND STORAGE SYSTEM - A management computer collects a usage condition of a volume from a host computer and a storage apparatus at each site, consolidates management thereof, and prevents a volume from duplicating among applications as a copy source. This makes it possible to select a used volume in an application as a copy source without excess or deficiency and to create a copy pair configuration definition without duplication or incompatibility. If a replication environment is constructed in a large-scale storage system, the consolidated management of a usage condition of a volume collected from the host computer and the storage apparatus at each site makes it possible to create a copy pair configuration definition by a task constituted by a plurality of applications. | 03-25-2010 |
| 20100088556 | FAULT MANAGEMENT SYSTEM IN MULTISTAGE COPY CONFIGURATION - 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. | 04-08-2010 |
| 20100153666 | Storage system, method for calculating estimated value of data recovery available time and management computer - The invention provides a technology applicable to technologies other than a main frame technology and monitors data recovery available time while suppressing a monitoring error within a certain range in a storage system that performs Asynchronous Remote Copy among storage devices. A management computer in the storage system stores latest or quasi-latest management data corresponding to data staying in a buffer of the first storage device with temporal information at certain monitoring intervals, calculates an estimated value of the data recovery available time which is time of data stored in the second storage device corresponding to data stored in the first storage device, based on the temporal information stored, and based on a certain management data among earliest or quasi-earliest management data or a number of the data staying in the buffer at the certain time and displays the estimated value on a display section. | 06-17-2010 |
| 20100274767 | BACKUP METHOD FOR STORAGE SYSTEM - The present invention provides a backup method that makes it possible to specify the recovery-enabled time of an application even in a case where a backup has been performed without staticizing the application. In response to a first instruction from a management computer, a storage system backs up a first volume to a second volume at a first time while a first host computer continues to process an application. In response to a second instruction from the management computer, a second host computer reads out the data of the second volume and acquires a second time that is the time at which the application is recovery-enabled. The management computer stores the relationship between the backup and the second time in backup catalog information. | 10-28-2010 |
| 20100299309 | BACKUP MANAGEMENT METHOD - Restoration of all virtual machines are managed in respect of each restoration time thereof in a case where virtual machines at certain time in the past are restored under a server virtualization environment in which a plurality of virtual machines are constituted. A host computer creates a first snapshot of a first virtual machine at a first time specified by a management computer, and stores the first snapshot in a first logical volume of a storage device. Next, the storage system replicates in a second logical volume the first logical volume. In a case where the host computer creates a second snapshot of a second virtual machine at a second time that is before the first time and stores the second snapshot in the first logical volume, the management computer manages or displays the second snapshot creation time and snapshot information in association with the first snapshot creation time and snapshot information, respectively. | 11-25-2010 |
| 20110041004 | BACKUP MANAGEMENT METHOD BASED ON MODE OF FAILURE - A storage management program is provided with a function of determining a suspension/continuation of a remote backup based on an operation-at-failure management table, and accomplishes the suspension/continuation of the backup based on the application in which a failure has occurred and the mode of this failure. The storage management program is also provided with a function of computing a change in the quantity of data from the last backup before the occurrence of the failure until the first backup after the occurrence of the failure, and determining the suspension/continuation of the backup, enabling to suspend/continue the backup in line with the operating status of the application. | 02-17-2011 |
