SuSE 7.3 is detecting 120GB hd with wrong size 1.8TB

hi, My suse 7.3 is detecting my WD Cavier HD WD1200JB with improper size but the HD id is detected properly (WD1200JB..). My bios for the computer also detected the id properly but size detected was 45GB and suse's detection was 1.8TB instead of 120GB. I was able to partition and mount the drive with size below ~110GB. Anything above that it will not work. I guess i could just leave it like that and not fully utilize my 120 gb, but i don't think this should be properly done. Anyone have any suggestion how to solve this problem? thanks henry