[H] Strange partition issue

[Thane Sherrington]

I have an ancient Tyan S1854 motherboard and I put a 320GB HD in 
it.  The BIOS recognizes it as being 132MB, and Windows Explorer says 
it's a 128GB partition, but diskpart says it's a 310GB partition.  Is 
Explorer simply showing me an incorrect lower number, or is diskpart wrong?

T