An engineer must create a Cisco UCS storage disk-group policy that provides high redundancy, fault...

RAID 6 exactly matches all stated requirements. Cisco defines RAID 6 as striped dual parity: data is striped across the disks, and two independent parity sets are maintained. The dual-parity design permits the virtual drive to remain available and reconstruct data after the failure of any two physical disks. Cisco also specifies a minimum of four disks for RAID 6. Striping allows reads to be serviced across multiple disks, increasing aggregate read bandwidth compared with a single-disk layout, although parity calculations impose a write penalty that must be considered during workload sizing. RAID 10 also requires at least four disks and offers excellent read and write performance, but it uses mirrored pairs rather than parity. It cannot guarantee survival of every possible two-disk failure; loss of both members of the same mirror destroys the array. RAID 5 uses block-level striping with only one parity block and protects against only one disk failure, so it fails the explicit dual-parity and two-failure requirements. RAID 50 stripes across multiple RAID 5 groups and improves performance and capacity, but each constituent group still has single parity; it also normally requires at least six disks. Because the question explicitly identifies two parity blocks, a four-disk minimum, striping, and tolerance of two simultaneous disk failures, RAID 6 is not merely preferable—it is the only option whose defined fault model satisfies every condition. Cisco UCS Manager storage-profile RAID definitions

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