Disk array device memory having areas dynamically adjustable in size
US7558937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2005 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Jul 4, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0866
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A disk array device having a plurality of hard disk units has a large-capacity memory mounted on a controller module which controls the whole device. The large-capacity memory has a system area managed by an OS and a cache area serving as a cache memory, and in addition, it has a table area which stores management/control information of the device and whose area size is changeable at an arbitrary instance. Therefore, it is possible to change the table area according to the state of the device in an active state without ON/OFF of a power source, so that an area not in use in the table area can be released for use as the cache memory. This makes it possible to appropriately varying the sizes of the table area and the cache area in an active state while the device is in operation, thereby realizing effective use of the large-capacity memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.