After you apply SP1 for Windows XP, you can manually enable support for hard drives that exceed 137GB, if:
- You have a 48-bit LBA compatible BIOS.
- You have a hard disk with a capacity that is greater than 137GB.
If you DO NOT meet these requirements, you will likely trash your entire system by implementing this tip.
To enable 48-bit LBA support:
1. Use the Registry Editor to navigate to:
2. Add Value Name EnableBigLba, a REG_DWORD data type, and set the data value to 1.
3. Restart Windows XP.
NOTE: DO NOT install any previous operating system on a disk created using this tip, as data loss will occur.