Certified Secure Software Lifecycle Professional Practice

RAID technology improves performance primarily by utilizing many smaller, low-cost disks as a group. This approach leverages the combined throughput of multiple drives, allowing for faster read and write operations than a single large disk could provide. By distributing data across multiple disks, RAID can employ various techniques, such as striping, which splits data into smaller chunks and writes them concurrently to different disks. This parallel processing enhances overall disk performance, reduces latency, and allows for better utilization of available storage resources.

The other options do not align with RAID's primary focus on performance. Using one large disk would not provide the benefits of increased speed and redundancy that RAID offers. A combination of SSD and HDD can improve performance in specific scenarios, but RAID, as a technology, does not inherently rely on mixing these types of drives. Lastly, while encryption can protect data, it does not contribute to improving the performance of the storage system, which is what RAID is fundamentally designed to do.