T7400 & Raid

I have a XEON Quad Core that works good, I bought it used & the seller is somewhat squirrely. 

It is supposed to be configured with a DATA drive (F:) 1 TB SCSI (SAS), and a 100GB Barracuda working drive (C:)... 

It seems that the programs I have installed all have gone to the working disk (C:) which seems to have better been assigned F: and the DATA drive would have been better as C:...

I think they may have configured the system wrong...  I need to know if there is some sort of controller card soft ware I should be accessing or this should be accessed in the BIOS...  I suppose I will need to reinstall all the software on the reassigned drives as well...

Any ideas, would be helpful, can muddle along just given the right direction...

Thank y'all...