As far as I know - windows insists on the series -

A floppy1
B floppy 2 - whether it's there or not
C Drive 1 partn1
D Drive 2 partn1
E Drive 1 partn2 etc till it's all used,
then
Drive 2 partn2 etc till it's all used

then CD's, Imation 120 Mb drives, USBs, etc however it bloody wants...

You can force anything above the hard drives to another Letter (I do) as mentioned above.

So if you have 2 physical HDs, then don't set up everything until you have Disk 2 partn 1 recognised as D... you are just wasting your time otherwise....

Robin