Storage system and storage control method
US10310758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2014 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Dec 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A second virtual volume having a plurality of second virtual areas is a clone of a first virtual volume having a plurality of first virtual areas. A first real area is allocated from a pool of real areas and based on storage devices to the first virtual volume. A storage controller allocates a second real area to the second virtual area before a write occurs in the second virtual area corresponding to the first virtual area to which the first real area is allocated. A physical area is allocated to a logical area corresponding to the first real area in each storage device, and data based on user data stored in the first real area is stored in the physical area. Each storage device allocates the physical area allocated to the logical area corresponding to the first real area to a logical area corresponding to the second real area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.