JSI Tip 1913. Unattended install with ExtendOEMPartition can corrupt NTFS drive larger than 4GB?

When you perform a conversion to NTFS, the boot sector is mirrored at the end of the disk.

When the drive exceeds 4GB, the 32bit field can't handle the calculation and the NTFS index buffer gets overwritten.

Fortuneatly, there is a workaround. See Knowledge Base article Q185773.