I ran across the below link:
http://www.pcguide.com/ref/hdd/file/ntfs/impl_Part.htm
With the interesting quote,
“Compression is not supported on file systems with cluster sizes over 4 kiB. Since most people like this feature, the setup and formatting programs in newer Windows operating systems will not choose a cluster size over 4 kiB in size.”
Does anyone know if this is true with newer versions of Windows?