Thread: Missing 513 GB on WD 640 Black with new XP install

I just bought WD 640 and when I installed Win XP the Win setup told me I have a max of 127 GB. I didn't have any other better options at that time. So I let Win format the max, and now, as you might imagine, I only have 127 GB out of the 640 I should have.

The system and the hard drive both show WD 6401 AALS as the model number.

How the heck did I lose 513 GB? How do I get it back?

Thanks.

You need to update windows xp to service pack 3 and then you can do 2 things windows itself wont expand a boot partition so you have the option of making a second partition for the rest of the space.

Or you can use a third party software, to expand the boot partition.

I know that pre-SP1 Windows XP can't recognize hard drives bigger than 127GB. You'll want to update to SP3 for your extra hard drive space, as well as all the security and stability improvements.

Then go ahead and follow rand_79's instructions. You could also slipstream Service Pack 3 onto your XP disc and just reinstall with that, but it will be easier to just use partitioning software.