Which Raid config is the Vault area on a CX600?

A.
Raid-0

B.
Raid-1

C.
Raid-3

D.
Raid-5

Explanation:
“This is where the cache is destaged upon a power fault or other fault in the storage system. Note this is now a five-drive vault space, so minimum configuration of the CX600 storage system is now a five-drive configuration necessary to support cached operations. The vault is a modified RAID 3 configuration.” {Engineering White Paper -Introduction to the CX600 , published 11/19/2002.}