I read your post twice and didn't see where you deleted the old partition, created a new big one and formatted that. All I read was you were trying to format it. Formatting alone won't create the big partition you want.
I have an HP computer running xp service pack 3. I have 2 1 TB hard drives going through a raid controller and 2, 80 GB hard drives all are SATA drives and working correctly, I am trying to install an additional 120gb hard drive taken from an older machine that is a IDE style. The IDE ribbon is connected to the CD ROM drive. So I am plugging this new IDE 120gb drive into the middle slave plug in.
My problem is that in Bios the drive is recognized as 120GB but when I boot in windows when I go to format the drive it says its only 31.4 GB of available space. I have formatted this in NTFS and it still shows 31.4GB. I have tried every possible combination of jumper settings. when I change those, sometimes the drive will disappear altogether, and other combinations display 31.4 GB but none of the combinations display the full 120 GB.
What am I missing. I know the computer can recognize large drives. I know the bios see it correctly. I know it is formatted correctly. I'm lost! Any help would be great.