I trying to calculate drive space with RAID. I know the equation is:
(n-1)/n * drive capacity
but, when I use that my calculations don't come out when I compare to what I already know exists:
I have 3 - 18.2gb SCSI drives that contain two logical drives C & D.
Using the math, (3-1)/3 * 18.2 = 12.1gb usable space per drive.
C has:
9.76gb
D has: 24.1gb
Drive D works out just fine but the C drive should have 12.1gb usable. I am so confused.
I need to know how to get the right numbers because my boss wants to know how much gain would come from intalling two additional 18.2gb drives.
Is there something I am missing?? I have researched 'til my eyes hurt because until a week ago, I haven't had to deal with calculating hard drive upgrades and such since my first year of college. HELP!!
