dDRAID: A technique for capacity and performance enhancement of RAID storage systems

With the growing technology, need for data storage systems is increasing day by day. Usage of inexpensive disk drives that provides higher disk capacity are less reliable. To increase the performance of the storage systems, multiple disk array are used so that different tasks can be executed concurrently. Different RAID levels have been implemented by researchers and are being used worldwide. All RAID levels requires a lot of storage space. If there is duplication in the data, then storing these duplicated data blocks is a wastage of storage space, as it is not required to store duplicated data blocks again and again. In this paper, we have proposed a new method i.e. dDRAID (data Deduplication over RAID Levels) by implementing the technique of deduplication over RAID levels so as to reduce the amount of storage space in order to provide better performance and reliability with maximum storage space available at least amount of cost involved. Implementation of deduplication over RAID levels in the proposed approach utilizes around 50% to 70% of storage space.