A customer wants to host their AIX PowerHA SystemMirror systems in two cities that are 175 miles (280
kilometers) apart.
Which solution will provide SAN-based data replication with the least latency between the two sites?

A.
Metro Mirror

B.
Copy Services Toolkit

C.
Double-Take RecoverNow for AIX

D.
Stretched Cluster

Explanation:
Metro Mirror (previously known as synchronous Peer-to-Peer Remote Copy (PPRC)) provides real-time
mirroring of logical volumes between two IBM ESS/DS6000/DS8000 family storage that can be located up to
300 km from each other.References: Exploiting IBM PowerHA SystemMirror V6.1 for AIX Enterprise Edition (May 2013), page 101
http://www.redbooks.ibm.com/redbooks/pdfs/sg247841.pdf