All of the following are data optimization (space efficiency) technologies from IBM EXCEPT（）.

单项选择题IBMLTO-5canbedifferentiatedfromHPLTO-5thruallofthefollowingfeaturesEXCEPT.（）

A.Giant Magneto Resistive heads 
B.speed matching 
C.flat lap head design 
D.grooved roller bearings 

单项选择题WhichoneofthefollowingBESTdescribesLongTermFileSystem(LTFS)?（）

A.eliminates dependence of middleware layer 
B.provides the ability to partition the library 
C.makes tape look and work like any removable media 
D.provides up to 48% lower power consumption in idle mode