Your company intends to design, manufacture, and market a new RAID (redundant array of independent disks) for network servers. The system must be able to store a total of 500 GB of user data and must have a reliability of at least 95% in 10 years. In order to develop the RAID system, 20 GB drives will be designed and utilized. To meet the requirement, you have decided to use a bank of 25 disks (25 × 20 GB = 500 GB) and utilize a system redundancy of 4 (each of the 25 disks has a redundancy of 4). What must the reliability of the 20 GB drive be in 10 years in order to meet the overall system reliability requirement?
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