Patent application number | Description | Published |
20120042141 | STORAGE APPARATUS AND CONTROL METHOD THEREOF - Improvement of read/write access performance with respect to a disk is proposed. A controller manages a first volume format LDEV, in which each distributed user data area and each distributed information area among a plurality of the distributed user data areas for storing a data part and a plurality of the distributed control information area for storing a control information part, are targets that capacity is changed. The controller also manages a second format LDEV, which include a plurality of groups each of which is formed from one distributed user data area and one distributed control information area, and in which each group is a unit that capacity is expanded in a real storage area. The controller converts a data address of the data part belonging to the first volume format LDEV into a data address of a data part of the second volume format LDEV in order to execute input/output processing with respect to the data part, when received an request for access to the data part belonging to the first volume format LDEV. | 02-16-2012 |
20120131287 | STORAGE CONTROL APPARATUS AND LOGICAL VOLUME SIZE SETTING METHOD - The present invention efficiently changes a volume size while maintaining a copy pair as-is. A PVOL and a SVOL # | 05-24-2012 |
20130036279 | STORAGE SYSTEM USING REAL DATA STORAGE AREA DYNAMIC ALLOCATION METHOD - The present invention aims at preventing the access performance of a distributed memory system by accessing via cross-over ownership a track mapping information formed as a hierarchical memory. In the process of assigning a real data storage area to a virtual volume, at first, a page from a pool is assigned, and thereafter, a track is assigned from said page. The page is composed of multiple tracks into which track data assigned at host write operation timings are stored sequentially from the top. A mapping information of the virtual volume and the page is stored in a control information page that differs from the track data, and the mapping information is stored in the control information page which could only be accessed by a microprocessor having the ownership of the virtual volume. | 02-07-2013 |
20130073826 | STORAGE SYSTEM AND METHOD OF CONTROLLING STORAGE SYSTEM - A storage system in an embodiment of this invention comprises a virtual volume to which real storage areas are allocated depending on data amount to be stored therein and which stores a plurality of mainframe data managed in units of tracks, each of the plurality of mainframe data including control information and one or more records storing user data, and a controller The virtual volume is managed by a first real storage area storing the records in the plurality of mainframe data and a second real storage area storing the control information in the plurality of mainframe data. The controller determines not to allocate the first real storage area to the virtual volume in a case that user data in the records in the plurality of mainframe data are initial values. The control information in the plurality of mainframe data is stored in the second real storage area allocated to the virtual volume. | 03-21-2013 |
20130282998 | BACKUP SYSTEM AND BACKUP METHOD - A backup system and backup method with which the processing time can be shortened without increasing the overhead and burden on the system administrator in a two-stage backup. | 10-24-2013 |
20130290663 | STORAGE APPARATUS AND CONTROL METHOD THEREOF - Improvement of read/write access performance with respect to a disk is proposed. A controller manages a first volume format LDEV, in which each distributed user data area and each distributed information area among a plurality of the distributed user data areas for storing a data part and a plurality of the distributed control information area for storing a control information part, are targets that capacity is changed. The controller also manages a second format LDEV, which include a plurality of groups each of which is formed from one distributed user data area and one distributed control information area, and in which each group is a unit that capacity is expanded in a real storage area. The controller converts a data address of the data part belonging to the first volume format LDEV into a data address of a data part of the second volume format LDEV in order to execute input/output processing with respect to the data part, when received an request for access to the data part belonging to the first volume format LDEV. | 10-31-2013 |
20140129770 | STORAGE SYSTEM USING REAL DATA STORAGE AREA DYNAMIC ALLOCATION METHOD - The present invention aims at preventing the access performance of a distributed memory system by accessing via cross-over ownership a track mapping information formed as a hierarchical memory. In the process of assigning a real data storage area to a virtual volume, at first, a page from a pool is assigned, and thereafter, a track is assigned from said page. The page is composed of multiple tracks into which track data assigned at host write operation timings are stored sequentially from the top. A mapping information of the virtual volume and the page is stored in a control information page that differs from the track data, and the mapping information is stored in the control information page which could only be accessed by a microprocessor having the ownership of the virtual volume. | 05-08-2014 |
20140195722 | STORAGE SYSTEM WHICH REALIZES ASYNCHRONOUS REMOTE COPY USING CACHE MEMORY COMPOSED OF FLASH MEMORY, AND CONTROL METHOD THEREOF - The first storage apparatus provides a primary logical volume, and the second storage apparatus has a secondary logical volume. When the first storage apparatus receives a write command to the primary logical volume, a package processor in a flash package allocates first physical area in the flash memory chip to first cache logical area for write data and stores the write data to the allocated first physical area. And when the package processor receives journal data creation command form the processor, allocates the first physical area to second journal area for journal data without storing journal data corresponding to the write data. | 07-10-2014 |
20140351513 | STORAGE APPARATUS AND CONTROL METHOD THEREOF - The storage system includes a plurality of storage devices. A storage controller is configured to manage a plurality of pages in a pool provided by at least one of the plurality of storage devices, to provide a virtual storage area to a host by allocating one or more pages from the pool dynamically, in which the virtual storage area is formed with a data area and a control information area. The storage controller is further configured to expand the virtual storage area on a unit basis, where the unit is a set of a given size area of the data area and a given size area of the control information area. In response to a write request from the host, the storage controller is configured to store data into the data area and to store control information for accessing to the data into the control information area. | 11-27-2014 |