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Which of the following is the BEST course of action to take to resolve the problem that a systems administrator receives a notification from the RAID controller that the RAID 5 array is degraded, the administrator sees that on logical disk 0, physical disk 2 has failed upon logging into the server?

A Schedule system downtime and replace physical disk 2. Wait until the array is rebuilt and confirm in the RAID controller that the system is no longer degraded.