I did a little search for information on how the "boost" works, but so far haven't been anything definitive. I did see that it has some compatibility issue. The following is from their wed site.
1.1. Minimum System Requirements
✦✦Windows XP, 32 bit and 64 bit
✦✦Windows Vista and Windows 7, 32 bit versions only.
✦✦Hi-speed USB 2.0
IMPORTANT NOTE: LaCie USB Boost is not compatible with Macintosh
and Linux operating systems and 64 bit versions of Windows Vista and Windows 7.http://www.google.com/url?sa=t&source=...MsGv3ThXPx3mFNA