windows 2000 can only detect HDD up to 128 Gb


Well microsoft says that it is because they purposely limit the detection mode, so the 48-bit mode is in disable state.
must have SP4 installed first (for XP must have at least sp2 i think).

The following conditions are necessary for the correct functioning of 48-bit LBA ATAPI support:
A computer with a 48-bit LBA-compatible Basic Input/Output System (BIOS) installed.
A computer with a hard disk that has a capacity of greater than 137 gigabytes (GB).

You must enable the support in the Windows registry by adding or changing the EnableBigLba registry value to 1 in the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\atapi\Parameters

To enable 48-bit LBA large-disk support in the registry:

  • Start Registry Editor (Regedt32.exe).
  • Locate and then click the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atapi\Parameters
  • On the Edit menu, click Add Value, and then add the following registry value: Value name: EnableBigLba
  • Data type: REG_DWORD
  • Value data: 0x1
  • Quit Registry Editor.
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