i have a 200 gig maxtor but im only reading 127. ive downloaded the latest windows service pack and still no luck. i downloaded the big drive enabler but i get this error "Support is currently enabled for 48-bit LBA for atapi disk drives. you do not need to run this registry update." what can i do

Perhaps this may help http://www.pcguide.com/ref/hdd/bios/over.htm

At "Manually entering Drive Geometry Parameters".

Is the full drive size being auto-detected by the BIOS?

Do "MaxBlast" & "Powermax" see the full capacity?

Is the full drive size being auto-detected by the BIOS? Agree this could well be the problem area. You can read the word doc at the following link for some related advice even though the doc is mainly aimed at problems when installing Windows on a system without a floppy diskette.

Direct Link (http://www.entsoft.co.uk/public_files/Problem-Solution-2.doc) from http://www.entsoft.co.uk/html/windows.html

the drive is currently on auto detect

How big does BIOS show the hard drive, (does it show 137gb or 200gb?).

bios reads at 200g

I don't like to nit-pick, but...

g = gram
G = Giga
b = bit
B = Byte

So
gb = gram-bit [a meaningless nonsense-unit]
GB = Giga-Byte