help, server keeps automatically creating parts

parts as in partitions, ive never seen anything like this, i RAID0 my 2 1.5tb hard drives, all is well, it says i have 2999.0gb of data in my BIOS, okay...i go to setup server edition 10.10, and pthhhbt it says i have a serial ATA RAID that is 801.0 gb...and i am wondering how it gets that insanely random number of 801.0. okay...so i reformatted it with esata on my system76 laptop...2 completely clean hard drives....re-set up raid....still. 64 bit server edition