Abstract
With the increasing demand for capacity, speed, and reliability in large-scale storage systems, a mechanism should exist to ensure the data availability. Though there exist kinds of erasure code implementations in RAID-6, maximum distance separable (MDS) codes provide simple yet better way of data protection and recovery mechanism in the course of a disk failure. RAID-6 is preferred due to the capability of fault tolerance against simultaneous two disk failures. In addition to the provisioning of fault tolerance against disk failures, it is also necessary to concentrate on recovery to avoid data unavailability. Even though the RAID-6 supports two disk failures, when a number of disk failures are more than its parity, data will be lost. Hence, it is important to address the single disk failure and recover the failed disk at the earliest. The early recovery of a failed disk (i.e., recovery time) depends on the number of overlapping blocks. The hybrid code achieves the optimal recovery time than the other categories by consuming 22% of reused blocks.
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Ramkumar, M.P., Balaji, N., Emil Selvan, G.S.R., Jeya Rohini, R. (2019). RAID-6 Code Variants for Recovery of a Failed Disk. In: Nayak, J., Abraham, A., Krishna, B., Chandra Sekhar, G., Das, A. (eds) Soft Computing in Data Analytics . Advances in Intelligent Systems and Computing, vol 758. Springer, Singapore. https://doi.org/10.1007/978-981-13-0514-6_24
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