I had the same Problem with my Lifebook U772.
But I didn't get activated the AccelerateButton in the Intel Rapid Storage driver.
That is normal.
You can only use the Rapid Storage driver with an Desktop Mainboard and Z68 Chipset.
All ultrabooks like Samsung, Fujitsu etc with an Express Cache SSD use an external Software with name ExpressCache from diskeeper corporation.
This Software does the same like the Intel rapid storage driver but for Fujitsu without an nice gui.
Samsung has a little gui for the express cache, fujitsu has nothing. Here is a picture of the Samsung guihttp://malkyne.com/basement/images/chro ... _cache.png
But you are able to get some infos with the command line.
Start command line with administrator rights, go to expresscache folder and start "eccmd -info"
You get this software in the download section from Fujitsu.
When you download the driver package for first use, you can find it under the folder "utilities".
There is also a script for partitioning the SSD to use ExpressCache Software and Intel Rapid Start Technology