| Patent application number | Description | Published |
|---|
| 20090157990 | Backing-up apparatus, backing-up method, and backing-up program - A backing-up apparatus, upon receiving an instruction to execute backing up, allocates a storage area to store a snapshot to be produced to each time point indicated by the instruction. When the original data is updated after the time point indicated by the instruction, it is checked that the original data corresponding to the place to which the updating has been executed at a time point immediately before the time point indicated by the instruction is stored in the storage area allocated as the storage area to store the latest snapshot produced for the immediately previous time point. When it has been confirmed that the original data is not stored, the original data immediately before the updating corresponding to the place to which the updating has been executed is stored in only the storage area to store the latest snapshot. | 06-18-2009 |
| 20090158080 | STORAGE DEVICE AND DATA BACKUP METHOD - A storage device includes: a storage unit for storing data; a memory for storing management information; a local storage unit for storing differential data; a controller for controlling the storage device in accordance with a process comprising the steps of: updating data; updating management information; transmitting differential data to the another storage device, the differential data being the updated portions of the data which have been updated after preceding backing up of data until current backing up of data; resetting the management information after transmitting the differential data; storing, when the storage device fails transmission of the differential data to the another storage device, the differential data and the associated management information in the local storage unit; and transmitting the differential data to the another storage device at a later time after resetting of the management information. | 06-18-2009 |
| 20090249010 | APPARATUS AND METHOD FOR CONTROLLING COPYING - Pre-update data is copied from a first storage device onto a second storage device in response to an update instruction to update data on the backup target volume on the first storage device. A copy status of each data on the backup target volume is managed with position information of the data mapped thereto. If bad data is present in the data on the backup target volume, the position information indicating the position of the bad data is searched. In accordance with the copy status managed with the position information mapped thereto, it is determined whether the pre-update data of the bad data is stored on the second storage device. | 10-01-2009 |
| 20100017573 | STORAGE SYSTEM, COPY CONTROL METHOD OF A STORAGE SYSTEM, AND COPY CONTROL UNIT OF A STORAGE SYSTEM - A storage system and a copy control method enabling copying of data stored in a first volume connected with a higher-level device to a second volume. The system and method include controlling an update using a first management table for managing an update during a period from reception of a copy instruction from the higher-level device to reception of a predetermined command, and transferring update data of the first volume to the second volume based on the update situation in the first management table. | 01-21-2010 |
| 20100042795 | STORAGE SYSTEM, STORAGE APPARATUS, AND REMOTE COPY METHOD - Plural storage devices are cascade connected via a network, and the remote copy is executed among the plural storage devices. The data transferred from the copy source are temporarily stored in the buffer. Upon completion of the data reception, the data in the buffer are output to the data storage unit collectively, and the data are transmitted to the network connected storage device as the copy destination. | 02-18-2010 |
| 20100180094 | STORAGE SYSTEM, BACKUP STORAGE APPARATUS, AND BACKUP CONTROL METHOD - A storage system includes a first storage apparatus and a second storage apparatus including a second controller for sequentially transferring a copy of the part of the segments of data from a second buffer into a second storage device segment by segment in the same sequence as the second buffer have received a copy of the part of segments of data from a first buffer of the first storage apparatus. The second controller producing a backup copy in a backup data storage portion by copying a copy of one of the segments of the data stored in the second storage device that has been transferred from the second buffer into the second storage device while transferring a copy of the subsequent segment of the data next to said one of the segments of the data in the sequence from the second buffer to the second storage device. | 07-15-2010 |
| 20100217932 | STORAGE APPARATUS AND STORAGE CONTROL APPARATUS - A storage apparatus includes a copy control unit for managing a copy session for copying an copy source data area in at least one of the first to the Mth copy source disk groups to an copy destination data area in a corresponding copy destination disk group, setting a first to an Mth copy session groups, each of the copy session groups including one or more copy sessions from the ith copy source disk group to the ith copy destination disk group as the copy session, and performing repeatedly a selection operation for cyclically selecting a copy session from each of the first to the Mth copy session groups in a predetermined sequence and a control operation for cyclically executing copy processing on a predetermined copy processing unit basis for the M copy sessions selected by the selection operation in a predetermined sequence for a prescribed number of times. | 08-26-2010 |
| 20110087850 | STORAGE APPARATUS AND METHOD FOR STORAGE APPARATUS - A storage apparatus includes a storage module, a memory having areas storing data to be copied to the storage device, a saving buffer for temporarily saving the data stored in the areas, a control module for executing receiving a write request including the data to be stored in the storage apparatus, storing the data included in the write request to the storage module and one area, saving the data stored in the one area to the saving buffer when the number of areas which the copying is executed is not less than the threshold value, copying the data stored in the one area to the storage device or writing the saved data stored in the saving buffer to the one area when the number of areas which the copying is executed is less than the threshold value, determining the threshold value in accordance with an amount of the write request. | 04-14-2011 |
