A fiend of mine wishes to rearrange how his computer works.
Currently he has "C" and "D" HDDs and a mobile rack containing an 
"E" drive.
He wishes to instal another mobile rack and put his "C" drive in 
this rack. So far so good.
He now wants to run a have a second "C" drive and swap it for the 
"C" drive in the mobile rack. Initially the two "C" drives will be 
identical but gradually will be different as files on one will not 
be copied to the other. In other words he want to run "C" drive (A) 
and "C" drive (B) alternatively from the one mobile rack.
My question is: Can this be done or are there hidden reasons why 
this will not work?

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