anaconda failed during an update from 6.2 to 7.0 when two linux raid partitions where defined in the partition table of my harddisk, but neither configured nor formatted - that means: unused. With fdisk I set the partition type to '83' (linux native) - so now it's running.
This is relate to a feature request we already have logged - thanks for the report. *** This bug has been marked as a duplicate of 17932 ***