What is a defining property of RAID 6?

RAID 6 is defined by its ability to use block-level striping while providing redundancy through the use of two parity blocks. This unique feature allows RAID 6 to withstand the failure of two disks simultaneously, making it a highly reliable option for data integrity and protection against possible data loss. The use of two parity blocks means that data is not only striped across multiple disks, enhancing performance, but also secured with additional redundancy, which is a significant advantage over other RAID levels that utilize a single parity block.

The characteristic of utilizing block-level striping is crucial because it optimizes performance by spreading data across several disks, while the dual parity increases fault tolerance. This design makes RAID 6 particularly beneficial for applications that require both performance and high levels of data protection.

In contrast, other options do not accurately represent the fundamental properties of RAID 6. The requirement for only two disks is not correct, as RAID 6 typically requires a minimum of four disks to effectively implement its dual-parity system. While RAID 6 may be slower than RAID 10 due to its overhead from the additional parity calculations, it is not generally classified as primarily for high-performance applications as RAID 10 is. Thus, the defining feature encapsulated in choice B is crucial for