🚀 go-pugleaf

Hi folks,
I have three hard disks on my PC
2 of em are in a RAID1 arrangement. (C:)
1 is stand alone (G:)
and
I have a drive letter F: created via a sub command
I run as a service on start DRIVEF.BAT whose source is
subst f: c:\Dev
See, all my batch files I use for archiving was originally
setup as drive F on and older PC, so I place my entire
Development environment in a Path c:\dev..
ANYWAY!...

I am writing this sorting application and I think I can get
better performance if I do asynchronous writes to temp paths
on each accessible drives HOWEVER!.....

I need to know which drives are physically independent of one another.
Imagine now that my drive c: also has a partition H:, then C: and H:
and F: are all physically be the same. Making temporary writes to all 
three will be useless. SO!.... (finally)

How can I truly get a reflection of which drives letters I can use
that will represent all the physically accessible drives independent
of one another (not including CDROM/Floppy).

Thanks for reading folks!