What is the new highly availability feature of Smart Array Advanced Pack 2.0?

A.
Advanced data mirroring

B.
Offline recombining mirror

C.
Dual domain

D.
Advanced capacity expansion

Explanation:
http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/smartarra
y-advanced/index.html(Overview, second paragraph)