In a RAID setup, what is one of the main purposes of redundancy?

In a RAID setup, one of the primary purposes of redundancy is to protect against data loss. Redundancy is achieved by storing the same data across multiple disks or through various RAID configurations that duplicate information. This means that if one disk fails, the data can still be accessed from another disk that holds a copy. This safeguard is essential for maintaining data integrity and ensuring that critical information is not permanently lost due to hardware failures.

The presence of redundancy allows organizations to continue operations without significant interruptions, restoring the data from backup disks seamlessly. This is particularly crucial in environments where data availability is critical, as it helps prevent data loss scenarios that could result from single disk failures. In contrast, other options focus on aspects like storage efficiency, speed, or monitoring, which are important in their own right but do not directly address the key function of preventing data loss that redundancy provides.