Your server software will handle the 1 terabyte or 1.5 terabyte drives without any problem. If you use dual core technology and SATA hard drives this is current technology.
I have 1 and 1.5 terabyte drives running on Ubuntu-Server with AMD64-X2 processors with no problems. I have used the BIOSTAR TFORCE TA780G M2+ AM2+/AM2 AMD 780G Micro ATX AMD Motherboard
with great success on just such a server.
I have several some of which run Ubuntu-Server i86 and some AMD64.