Patent application number | Description | Published |
20090049241 | METHOD FOR CONTROLLING STORAGE SYSTEM, AND STORAGE CONTROL APPARATUS - A method for controlling a storage system including a host computer, and a first and a second storage control apparatuses each receiving a data input/output request from the host computer and executing a data input/output process for a storage device in response to the request, comprises connecting a first communication path between the host computer and the first apparatus; connecting a second communication path between the first apparatus and the second apparatus; receiving by the first apparatus a first data input/output request from the host computer through the first path; when the first apparatus has judged that the first request is not for the first apparatus, transmitting by the first apparatus a second data input/output request corresponding to the first request, to the second apparatus through the second path; and by the second apparatus, receiving the second request and executing a data input/output process corresponding to the second request received. | 02-19-2009 |
20100180077 | Logical Volume Transfer Method and Storage Network System - The present invention transfers replication logical volumes between and among storage control units in a storage system comprising a plurality of storage control units. To transfer replication logical volumes from a storage control unit to a storage control unit, a virtualization device sets a path to the storage control unit. The storage control unit then prepares a differential bitmap in order to receive access requests. When the preparation is completed, the virtualization device makes access requests to the storage control unit. The storage control unit then hands over the access requests to the storage control unit. Subsequently, the storage control unit performs a process so that the access requests are reflected in a disk device and performs an emergency destage of storing data in a cache memory into disk device. When the emergency destage is ended, the storage control unit connects to an external storage control unit and hands over access requests to the external storage control unit. | 07-15-2010 |
20130067183 | Logical Volume Transfer Method and Storage Network System - The present invention transfers replication logical volumes between and among storage control units in a storage system comprising a plurality of storage control units. To transfer replication logical volumes from a storage control unit to a storage control unit, a virtualization device sets a path to the storage control unit. The storage control unit then prepares a differential bitmap in order to receive access requests. When the preparation is completed, the virtualization device makes access requests to the storage control unit. The storage control unit then hands over the access requests to the storage control unit. Subsequently, the storage control unit performs a process so that the access requests are reflected in a disk device and performs an emergency destage of storing data in a cache memory into disk device. When the emergency destage is ended, the storage control unit connects to an external storage control unit and hands over access requests to the external storage control unit. | 03-14-2013 |
20140164698 | Logical Volume Transfer Method and Storage Network System - The present invention transfers replication logical volumes between and among storage control units in a storage system comprising storage control units. To transfer replication logical volumes from a storage control unit to a storage control unit, a virtualization device sets a path to the storage control unit. The storage control unit prepares a differential bitmap in order to receive access requests. When the preparation completes, the virtualization device makes access requests to the storage control unit. The storage control unit hands over the access requests to the storage control unit. The storage control unit performs a process so that the access requests are reflected in a disk device and performs an emergency destage of storing data in a cache memory into disk device. When the emergency destage ends, the storage control unit connects to an external storage control unit and hands over access requests to the external storage control unit. | 06-12-2014 |
Patent application number | Description | Published |
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 |
20100088280 | COMPUTER SYSTEM FOR HIERARCHICALLY MANAGING A JOURNAL AND METHOD THEREFOR - Provided is technology in which a first storage system includes a first logical volume and a second logical volume, the second logical volume stores therein a first differential data item representing a differential between data that was stored in the first logical volume at a first time instant and data that was stored in the first logical volume at a second time instant being later than the first time instant, a second storage system includes a third logical volume, the first storage system transmits the first differential data item to the second storage system, the second storage system stores the first differential data item into the third logical volume, the first storage system deletes the first differential data item from the second logical volume, and the computer system retains management information set for associating the first logical volume with the third logical volume storing therein the first differential data item. | 04-08-2010 |