I tried to install FreeBSD 10-RELEASE on an AMD64 system with a Highpoint RocketRAID 2720SGL card which has 4 3TB drives configured in a RAID 5 array. Any attempt to write to the array results in a kernel panic fatal trap 9. It happens while trying to create the partitions during the install. I've tried the manual partitioning and get the same thing. I've tried using MBR instead of GPT and it's the same. Even going to the shell and attempting to write to the array (da0) using dd results in the same. I've just tried the install with 9.3-RELEASE and have no such troubles.