Enable 48-bit LBA Support for Large Hard Drives

By default Windows 2000 SP2, Windows XP and earlier versions of Windows do not support 48-bit Logical Block Addressing (LBA) for drives larger than 137GB as defined in the ATA/ATAPI 6.0 specification.

Open your registry and find the key below.

Create a new DWORD value, or modify the existing value called 'EnableBigLba' using the settings below.

Settings:
System Key: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atapi\Parameters]
Name: EnableBigLba
Type: REG_DWORD (DWORD Value)
Value: (0 = disabled, 1 = enabled)


Note: Please see Microsoft support article Q305098 for important information regarding this setting.