Cat

I have two hard disks in my computer. Nowadays many people have more
than one hard disk. Let's call them A and B. A is a large disk, and I
have installed Windows on A. Most of my personal files are also stored
on A. B , however, is relatively small and contains seldom used files
and back up copies.

Since B is not often accessed, B usually gets turned off by OS. But
for no apparent reason ( I guess it maybe due to some sort of
defragmentation or indexing) B gets turned on making an annoying
sound.

I could manually cut off the power by opening the chassi and plugging
out the power code of B, but that will be even more annoying.

I can set B won't be turned off, but it will waste a lot of power
since B is idle most of the time.

Can't I just make the B offline till I want it to be functioning
again? I mean I'd like to turn B off using some sort of software and
prevent it to be automatically turned on until, I explicitly turn it
on. I saw PerfectDisk (a defragmenation software) make a drive offline
so that it to be disapeared from Windows Explorer. So it should be
possible in some way....

Any ideas?