How does UFSD work?
UFSD provides access directly to the physical devices. That is why it can process partitions regardless of their OS support. With UFSD it is possible to mount NTFS partitions under Mac® OS X, thus getting access to its contents, just the way it is realized in the NTFS for Mac® OS X driver, and it also allows direct access via physical device addressing, the way it is realized in UFSD SDK.