Patent ID: 9268785
Filing Date: 2016-02-23
CPC Classification: G06F

Claim Text:
1. A method for preserving data redundancy of identical data in a data deduplication system comprising a storage device coupleable to a host computing device including a host application, the storage device comprising a virtual storage device comprising a plurality of virtual addresses, and a storage controller coupled to the storage device and operable in a computing environment, comprising: selecting a first physical disk for a first range of virtual addresses in the virtual storage device; selecting a second physical disk for a second range of virtual addresses in the virtual storage device; implementing, by the storage controller a general storage policy including a deduplication operation for preventing multiple copies of the same data from being stored; designating, by the storage controller, the first range of virtual addresses and the second range of virtual addresses as not capable of being subject to the deduplication operation; designating, by the storage controller, a remainder of the virtual addresses in the virtual storage device as subject to the deduplication operation; generating, by the host application, a plurality of data blocks; implementing, by the host application, a specific storage policy for each respective data block generated by the host application so that at least a portion of the data blocks generated by the host application are not subject to the general storage policy, each new storage policy implemented by: