What RAID method is used on the Cloud Block Storage bac…

What RAID method is used on the Cloud Block Storage back-end to implement a very high level
of reliability and performance?

A.
RAID 1 (Mirror)

B.
RAID 5 (Blocks striped, distributed parity)

C.
RAID 10 (Blocks mirrored and striped)

D.
RAID 2 (Bit level striping)

Explanation:
Cloud Block Storage back-end storage volumes employs the RAID 10 method to provide a very
high level of reliability and performance.
http://www.rackspace.com/knowledge_center/product-faq/cloud-block-storage