Abstract
This scientific paper deals with the fault-tolerant disk arrays RAID-5 and RAID-6 with data striping. The structure of the disk arrays RAID-5 and RAID-6 and mathematical model of the redundant data coding in these disk arrays, based on the arithmetic of the binary Galois field GF (28), are discussed. The obtained by the authors theoretical formulas for estimation of the data recovery time in the case of failure and replacement of single disk in the RAID-5 arrays, and data recovery time in the cases of failure and replacement of single and two disks in the RAID-6 arrays are also presented. Finally, the examples of theoretical estimation of the data recovery time in the RAID-5 and RAID-6 arrays are also discussed.
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