If your ATAPI hard disk is bigger than 137 GB, Windows XP (without any service pack) will be unable to take full advantage of it due to its default 32-bit LBA support. This tweak allows you to use 48- bit LBA.
Navigate to:
HLM\System\CurrentControlSet\Services\Atapi\Parameters
The tweak involves changing the value of the DWORD called EnableBigLba to 1.
WARNING: Your system must meet these requirements:❍ You must have a 48-bit LBA compatible BIOS ❍ Your hard disk must be larger than 137 GB Performing the tweak on systems that do not meet these requirements WILL result in data losss! You have been warned!
