Do you really want to bog down your expensive server, which
has many other tasks to perform, with storing and accessing
discs? Just because you have a server doesn't mean loading it
up comes without costs. The sooner it's full, the sooner you
have to buy another expensive server. It is more economical to
get a special purpose CD/DVD server to manage this task. A
CD/DVD server copies an exact image of the disc rather than
simply copying the data, so it is identical to accessing the
disc itself, only faster.
Loading and sharing out a disc on a general purpose server
takes a number of steps. This is fine for one or two discs, but
is a real chore for large collections or subscriptions where new
discs are coming in each month to replace old ones.