Patent ID: 8818965

Claim:
A method for rewriting data in a deduplication storage environment by a processor device, comprising: partitioning an original deduplication file system (DFS) file into a first set of sections being sections including data affected by rewrite operations and a second set of sections being sections including data unaffected by rewrite operations; creating a new DFS file to be stored as part of a plurality of user files, the plurality of user files including the original DFS file and being accessible by a sequential deduplication file system and a dynamic non-deduplicated file system, the dynamic non-deduplicated file system including a plurality of dynamic metadata files having entries pointing to corresponding sections of the original DFS files; directly writing the first set of sections of the original DFS file including data affected by rewrite operations into the new DFS file; quoting the second set of sections from the original DFS file including data unaffected by rewrite operations into the new DFS file; and deleting the original DFS file.