System and method for limiting fragmentation
US8990477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system are disclosed for controlling the storage of data in a storage device to reduce fragmentation. The method may include a controller of a storage device receiving data for storage in non-volatile memory, proactively preventing fragmentation by only writing an amount of sequentially addressed logical groups of data into a main storage area of the storage device, such as multi-level cell (MLC) flash memory, and reactively defragmenting data previously written into the MLC memory when a trigger event is reached. The system may include a storage device with a controller configured to perform the method noted above, where the thresholds for minimum sequential writes into MLC, and for scanning the memory for fragmented data and removing fragmentation by re-writing the fragmented data already in MLC into new MLC blocks, may be fixed or variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.