Locally on the server, data is moving at the speed of the PATA or SATA buss and in many cases no data is moved at all, just the directory entries are changed.
That depends. A "copy" command will always move
the data - on the same or to a different volume. A "move" command will move
the data to a different
volume, but on a "move" command to the same volume
, only the directory entries are being changed.
And if you think about it logically, that makes sense.