Reliability model of disk arrays RAID-5 with data striping

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Rahman, P.A.^1 ; Novikova Freyre Shavier, G.D.^1

Ufa State Petroleum Technological University, October Avenue 2, Sterlitamak

453118, Russia^1

关键词: Advanced modeling;    Disk replacement;    Failure rate;    Normal state;    Redundant arrays of inexpensive disk;    Reliability model;    Reliability parameters;    Scientific papers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/2/022087/pdf
DOI  :  10.1088/1757-899X/327/2/022087

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Within the scope of the this scientific paper, the simplified reliability model of disk arrays RAID-5 (redundant arrays of inexpensive disks) and an advanced reliability model offered by the authors taking into the consideration nonzero time of the faulty disk replacement and different failure rates of disks in normal state of the disk array and in degraded and rebuild states are discussed. The formula obtained by the authors for calculation of the mean time to data loss (MTTDL) of the RAID-5 disk arrays on basis of the advanced model is also presented. Finally, the technique of estimation of the initial reliability parameters, which are used in the reliability model, and the calculation examples of the mean time to data loss of the RAID-5 disk arrays for the different number of disks are also given.