Sorry but XP is very old.

by R. Proffitt Moderator - 5/7/12 5:42 PM

In Reply to: 2TB by AMMCP

I don't want to upset you but SP3 is short for Service Pack 3 or the last big update MSFT issued.

When XP shipped we have to be very careful about versions of XP since it had 24 bit LBA so about 127GB drive size limitations. More on the web and sites like http://www.largeharddrivesupport.windowsreinstall.com/

So with that out of the way your numbers seem to tell us that you do have XP and have that limitation.
Bob