"Ghost" System folder on internal hard disk.

I have a mid-2010 iMac with a 120 SSD (used for the operating system, primary applications and documents) and a 1 TB internal hard disk for seldom-used applications, documents and movies. Although everything works reasonably well, the Hard Disk keeps creating a System folder on the internal Hard Disk with a Library folder, which in turn holds some Caches. If I delete this System folder on the Hard Disk by way of Cocktail, the computer simply creates it again. Is this normal?

Hey Allan...
I assure you, these audio related cards are very much
completely real and assuredly non-mythical!
They are:
A MOTU PCI-424 card, which is a proprietary card for running multitrack MOTU audio interfaces.
A Universal Audio UAD-1 card, which is a piggy-backing DSP card that runs audio plug-ins.
This is the main computer in a recording studio that I
run. My initial plan was to have two separate internal
drives that are identical, so that if one drive were to
die, I could immediately reboot from the other system
and have almost no down time.
I was asking about this on an audio related board and
someone made the point that having multiple instances
of system software might be causing a problem.
As a workaround, I think instead I will load an extra
internal SATA drive and just keep it in a box, waiting
where I can just pop it in if the system drive fails.
I've tried everything and the PCI cards don't show up
under system "A", if the drive with system "B" is also
mounted. I don't know if there's any tricky workaround
to this... mounting drives in a different order maybe?
I'm not heavily tech-savvy, so I think the easiest option
is just having a separate replacement drive rather than
using one of the drives that is always mounted.
Let me know if you think of anything though...
Best,
Fred

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