Evaluation of Data Durability in Erasure Coding Using Peak Shift Method of Drive Failure Risk

We evaluate data durability in erasure coding using a proposed method called peak shift method of drive failure risk. The proposed method creates data protection groups of drives with different drive failure risks such as different operation times so that the predicted peaks of the drive failure risks are not concentrated at the same time. This reduces the probability of multiple drive failures occurring at the same time, thereby reducing the probability of data loss. Under the supposed conditions, the data loss probability can be reduced by up to one order of magnitude by using existing drives that have been in operation for about 700 days.