Abstract

This paper proposes a novel Delta redundant array of independent disks (RAID) technique that enhances small-write performance, resists disk failures of up to 75% in the RAID architecture. In order to generate parity data, three partial strips within a horizontal strip are used. To generate one parity element, Delta RAID requires access from two data disks, one parity disk. Delta RAID provides a fast recovery algorithm to correct various disk failures. Delta RAID also employs additional buffer caching replacement (BCR), which reduces the number of read, write operations by both merging small chunks into a larger chunk with buffer size, splitting a big chunk into many smaller chunks with buffer size. Compared to traditional GRID RAID(SPC, STAR), GRID RAID(SPC, EO),, GRID RAID(STAR, STAR), Delta RAID improves average small-write performance by 233%, 224%,, 176%, respectively, improves read performance by 289%, 268%,, 176%, respectively.

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