Source: http://www.google.com/patents/US8074106?dq=7125605
Timestamp: 2014-03-16 16:51:07
Document Index: 624839717

Matched Legal Cases: ['Application No. 2008', 'art 5', 'art 6', 'art 7', 'art 8', 'art 200', 'art 200', 'Application No. 2008']

Patent US8074106 - Storage control device and RAID group extension method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe present invention provides a storage system having a controller that can extend an old RAID group to a new RAID group without decreasing a processing speed. A conversion part reads the data from an unconverted area A1, converts it into the data based on a new RAID organization, and write it into...http://www.google.com/patents/US8074106?utm_source=gb-gplus-sharePatent US8074106 - Storage control device and RAID group extension methodAdvanced Patent SearchPublication numberUS8074106 B2Publication typeGrantApplication numberUS 12/292,270Publication dateDec 6, 2011Filing dateNov 14, 2008Priority dateSep 8, 2008Also published asUS8312315, US20100064103, US20120072663Publication number12292270, 292270, US 8074106 B2, US 8074106B2, US-B2-8074106, US8074106 B2, US8074106B2InventorsYuko MatsuiOriginal AssigneeHitachi, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (15), Non-Patent Citations (1), Classifications (8), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetStorage control device and RAID group extension methodUS 8074106 B2Abstract The present invention provides a storage system having a controller that can extend an old RAID group to a new RAID group without decreasing a processing speed. A conversion part reads the data from an unconverted area A1, converts it into the data based on a new RAID organization, and write it into a storage area A3 of the new RAID group. An address management part updates an initial address Ps and a last address Pe saved in a flash memory if the initial address Ps saved in the flash memory and the newest last address Pe of a converted area A2 are matched. When a power failure occurs, it is checked to see whether or not the data within the converted area A2 is correct. The conversion part reads the initial address Ps and the last address Pe from the flash memory to resume a conversion process.
CROSS REFERENCES TO RELATED APPLICATIONS This application relates to and claims priority from Japanese Patent Application No. 2008-230228, filed on Sep. 8, 2008, the entire disclosure of which is incorporated herein by reference.
Patent document 1: JP-A-2007-323251 Patent document 2: JP-A-2007-323252 Patent document 3: JP-A-2008-003857 SUMMARY OF THE INVENTION The prior art had no viewpoint of generating a new RAID group having more storage capacity by reusing the disk drives making up the existent RAID group, and protecting the user data during extension of the RAID group. Also, the prior art did not disclose the configuration for extending the RAID group more quickly while protecting the user data.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing the concept of an embodiment of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing the overall concept in a form of the invention. A more detailed configuration example will be clarified in the following embodiment. A storage control device 1 comprises a plurality of disk drives 2, a cache memory 3, a flash memory 4, a conversion part 5, an address management part 6, a check part 7 and a restoration part 8, for example, as shown in FIG. 1.
Example 1 FIG. 2 is an explanatory view showing the overall configuration of a system in this example. This system comprises a storage control system 10, a host 20, and a management terminal 30, for example. The storage control system 10 comprises a controller 100 and a storage device mounting part 200. The storage device mounting part 200 is also called an HDU (Hard Disk Unit).
Example 2 Referring to FIG. 16, a second example will be described below. Since this example corresponds to a variation of the first example, the different points from the first example will be mainly described below. In this example, a progress situation of the conversion process is notified to the management terminal 30.
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