A customer needs a high-level fault-tolerant solution for critical data. The customer uses eight large-capacity
SAS drives as a single disk volume.
Which RAID level should the architect recommend to protect the customer against double drive failure?

A.
RAID 1 with a hot spare

B.
RAID 6

C.
RAID 5 with a hot spare

D.
RAID 5

Explanation:

RAID 6 (ADG) is an extension of RAID 5 for implementation on arrays of four or more drives. The data and two sets of parity information are striped across all drives in the array. The additional set of parity improves the fault tolerance of the array but results in lower write performance. The two sets of parity information are stored in different locations across the drives in the array and occupy the equivalent capacity of two physical drives.
RAID 6 protects against the simultaneous failure of two drives in the array
Reference:https://h50146.www5.hpe.com/products/storage/whitepaper/pdfs/c00386950.pdf