Adaptive Logical Group Sorting to Prevent Drive Fragmentation

摘要

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 and determining if a threshold amount of data has been received. When the threshold amount of data is received, the non-volatile memory is scanned for sequentially numbered logical groups of data previously written in noncontiguous locations in the non-volatile memory. When a threshold amount of such sequentially numbered logical groups is found, the controller re-writes the sequentially numbered logical groups of data contiguously into a new block. The system may include a storage device with a controller configured to perform the method noted above, where the thresholds for scanning the memory for fragmented data and removing fragmentation by re-writing the fragmented data into new blocks may be fixed or variable.