Prior to Service Pack 3, Windows 2000 did NOT support 48-bit Logical Block Addressing (LBA), as specified in the ATA/ATAPI 6.0 specification.
If you have a 48-bit LBA-compatible BIOS, and a hard disk larger than 137 GB, you can enable 48-bit LBA support:
1. Copy / Paste the following to a LBA48.reg file:
2. Merge the LBA48.reg file with your registry or run regedit /s <path>\LBA48.reg.
NOTE: If you enable 48-bit LBA support on a system that does NOT have a 48-bit LBA-compatible BIOS, and a hard disk larger than 137 GB, you will experience data corruption.