A customer wants to use Storage Efficiency features on volumes used for backup/archive
data. The customer is not concerned with performance degradation and is only concerned
about storage efficiency.

Which three Storage Efficiency features should be turned on to meet these needs?
(Choose three.)

A.
deduplication

B.
post compression

C.
storage QoS

D.
inline compression

E.
SyncMirror

Explanation:
http://community.netapp.com/t5/Tech-OnTap-Articles/Storage-Efficiency-inClustered-Data-ONTAP/ta-p/86822
http://www.netapp.com/us/products/platform-os/data-ontap-8/data-efficiency-features.aspx
https://library.netapp.com/ecm/ecm_get_file/ECMP1141092