I have tried two identical DAC960 raid controllers and also a DAC1100 raid controller and they both hang the installer when trying to format the first partition. Basically you get the formatting / dialog and see a small part of the progress bar before hanging completely. Switching over to VT5 shows that the format is hung at 1/<xx> instaed of incrementing normally. Note: All three cards worked fine is this repect when using 7.0. I tested them right after 7.1 failure.
There was a DAC960 bug in kernels prior to 2.4.1pre10. The next beta kernel should have the fix. Once that kernel is available, could you please verify if it is fixed ?
This defect is considered MUST-FIX for Florence Gold release
There is a gcc bug that miscompiles the DAC960 driver. Once a kernel is built with the fixed gcc, could you please try again ?
This is believed to be fixed in the latest Rawhide kernel.