Patent ID: 8650162

Claim:
A method comprising: identifying at least one modified data block of a file, wherein the identifying the at least one modified data block comprises detecting that the at least one modified data block was modified after a previous backup operation, and the file is stored in a first memory; converting the at least one modified data block into at least one deduplication segment, wherein a size of the at least one modified data block does not change, and a size of the at least one deduplication segment of is configurable independently of the size of the at least one modified data block; computing, using at least one processor, a signature for the at least one deduplication segment; detecting, using the at least one processor, whether storage media comprising backup data comprises a duplicate deduplication segment, wherein the detecting comprises comparing the signature with signature information that is associated with the backup data; comparing the size of the at least one modified data block with the size of the at least one deduplication segment; selecting a backup size based on a result of the comparison; and performing an incremental backup, wherein the incremental backup comprises copying at least one data unit to the storage media, and a size of the at least one data unit is equal to the backup size.