Patent ID: 8171063

Claim:
A method comprising: mapping a logical volume to a deduplication storage area, wherein the logical volume comprises a plurality of logical block locations, the deduplication storage area comprises a plurality of physical block locations, and the plurality of logical block locations are mapped to the plurality of physical block locations; organizing the logical volume into a filesystem, wherein the filesystem organizes the plurality of logical block locations into a plurality of files; modifying at least one file of the plurality of files, wherein the modifying modifies data within at least one physical block location of the plurality of physical block locations; in response to the modifying, generating reverse mapping information for at least one logical block location of the plurality of logical block locations, wherein the at least one logical block location is mapped to the at least one physical block location, and the reverse mapping information associates the at least one logical block location and the at least one file with one another; and in response to receiving a logical block address of the at least one logical block location, identifying the at least one file by accessing the reverse mapping information.