CompTIA Server+ (SK0-004) Practice Exam

In a RAID configuration, when a disk fails, the typical recovery procedure involves replacing the failed disk and rebuilding the RAID array. The reason this option is the correct course of action is that RAID is designed to provide redundancy and data integrity even in the event of a disk failure. After identifying the failed disk, the replacement disk is added to the RAID array, and the RAID controller will automatically start the rebuilding process. This process ensures that the data is restored to a fault-tolerant state by redistributing the existing data and parity across the newly included disk, allowing the system to continue operating normally with minimal disruption.

Other options do not align with standard practices for RAID recovery. A server shutdown and data backup might be reasonable steps in different scenarios, but they are not typically required just because of a single disk failure in a RAID setup. Running diagnostics on the remaining disks is a good practice for general maintenance, but it does not directly address the immediate need to recover from a failed disk. Fresh installation of the operating system would not be appropriate, as the goal is to maintain the data and the RAID configuration, rendering this step unnecessary and counterproductive.