Only 127GB HDD showing Windows 2000 SP4

Only 127GB is showing up in windows 2000 and only this amount showed up when installing windows 2000 Pro. I have 2 Hard disks and Both are restricted to this amount it seems. One disk is supposed to be 160 GB and one 320GB. I assumed with the other HDD ( 160GB ) that they just had the wrong box but with the new Hard drive and they both show the same amount it seems wrong

If you need anymore infomation just ask