What is a benefit of storage virtualization technology in the IBM System Storage DS8800（）

A.All types of the 2.5" disk drives offered by the DS8800 system have higher performance than the 3.5" disk drives supported by DS8700
B.The 2.5" disk drives included on the DS8800 support 6Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
C.The 2.5" disk drives included on the DS8800 support 8Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
D.The 2.5" 15k rpm drives offered by the DS8800 system support 6Gbps SAS-2

A.The DS8800 has a higher disk RPM than the Symmetrix DMX-4
B.The DS8800 has higher capacity with more efficient footprint than the Symmetrix DMX-4
C.The DS8800 supports FlashCopy for internal array replication
D.The DS8800 supports external virtualization

A.FlashCopy SE （PTC-SE） is much faster than the traditional DS8000 full-volume FlashCopy
B.FlashCopy SE （PTC-SE） also supports background copy
C.FlashCopy SE （PTC-SE） is optimized for use in cases where a high percentage of the source volume is updated during the life of the relationship
D.the additional capacity required forFlashCopy SE （PTC-SE） must only be planned for data which is changed on the source volume during host I/O transaction