| Patent application number | Description | Published |
|---|
| 20080243946 | Storage system and data recovery method - Proposed are a storage system and a data recovery method capable of guaranteeing data recovery processing at a service level sought by a user. This storage system and data recovery method uses one or more data recovery candidate points and specifies a section containing the journal and the replication of write data, checks a redundancy relation of a write range in the volume of write data written from host into the volume contained in the journal regarding one or more the journals in the section, and executes redundancy elimination processing of merging a plurality of the replications of write data or a plurality of the journals into a single replication of write data or a single journal based on the check result. | 10-02-2008 |
| 20080263190 | STORAGE SYSTEM - A host I/F unit has a management table for managing an MPPK which is in-charge of the control of input/output processing for a storage area of an LDEV, and if a host computer transmits an input/output request for the LDEV, the host I/F unit transfers the input/output request to the MPPK which is in-charge of the input/output processing for the LDEV based on the management table, an MP of the MPPK performs the input/output processing based on the input/output request, and the MP of the MPPK also judges whether the MPPK that is in-charge of the input/output processing for the LDEV is to be changed, and sets the management table so that an MPPK which is different from the MPPK that is in-charge is to be in-charge of the input/output processing for the LDEV. | 10-23-2008 |
| 20090198942 | STORAGE SYSTEM PROVIDED WITH A PLURALITY OF CONTROLLER MODULES - A plurality of global LDEV managed by a plurality of controller modules are provided above local LDEV under the control of each controller module. Each global LDEV is correlated to any of the plurality of local LDEV. The controller modules judge whether or not a local LDEV correlated to a global LDEV specified by an I/O request received from a host device or a first other controller module is a management target itself, and if the result of that judgment is affirmative, the controller modules access the local LDEV correlated to the specified global LDEV, while if the result of the judgment is negative, the controller modules transfer the received I/O request to a second other controller module. | 08-06-2009 |
| 20090254695 | STORAGE SYSTEM COMPRISING PLURALITY OF STORAGE SYSTEM MODULES - A plurality of modules ( | 10-08-2009 |
| 20090276661 | STORAGE SYSTEM CREATING A RECOVERY REQUEST POINT ENABLING EXECUTION OF A RECOVERY - A switch connected to a network system including a computer and a storage apparatus: controlling read/write request from the computer to the storage apparatus and controlling to store journal data in the storage apparatus; wherein the storage apparatus includes a first storage area for storing data to be used by the computer and a second storage area for storing journal data including write data and first update log information corresponding to the write data when there is a write request from the computer for writing data in the first storage area; wherein when the switch detects an event of status change related to the network system, the switch marks a first point of time corresponding to the event as a recovery request point, and creates second update log information corresponding to the recovery request point. | 11-05-2009 |
| 20100146232 | STORAGE SYSTEM, REMOTE COPY AND MANAGEMENT METHOD THEREFOR - A copy source storage controller received write data added with a time and issued from a host computer transfers the write data with the time to a copy destination storage controller. If there are a plurality of copy destination storage controllers, a representative copy destination storage controller compares times of write data copied to the plurality of copy destination storage controllers, and writes the write data in copy destination logical volumes in the sequential order of time. The representative copy destination storage controller judges that integrity of the write data is established, if a communication procedure is established with the copy destination storage controller and if the statuses of the copy source/destination logical volumes are coincident. In remote copy which guarantees integrity of write data and traverses a plurality of storage controllers, it is possible to judge at an optional time point whether integrity of write data can be guaranteed. | 06-10-2010 |
| 20110138085 | STORAGE SYSTEM - A host I/F unit has a management table for managing an MPPK which is in-charge of the control of input/output processing for a storage area of an LDEV, and if a host computer transmits an input/output request for the LDEV, the host I/F unit transfers the input/output request to the MPPK which is in-charge of the input/output processing for the LDEV based on the management table, an MP of the MPPK performs the input/output processing based on the input/output request, and the MP of the MPPK also judges whether the MPPK that is in-charge of the input/output processing for the LDEV is to be changed, and sets the management table so that an MPPK which is different from the MPPK that is in-charge is to be in-charge of the input/output processing for the LDEV. | 06-09-2011 |
| 20110145532 | STORAGE SYSTEM AND PROCESSING EFFICIENCY IMPROVING METHOD OF STORAGE SYSTEM - A storage system | 06-16-2011 |
