This is strange. Why the second disk is causing problems and when I was using the 120G version there is no problem?
The system was installed from zero when I change the disk, using the most recent image of Win 7 and installing all updates. There is no chance to reinstall all the system just to test and find de problem.
Now, the Dashboard is showing 99% of remain life (change form 98 to 99?), no sense.
