@bigdogchris:
If any of your hard drives exhibit the issues described in this thread, then I think it's best if you'd stick for now with the 12.9.2.1000 driver, weather you're using RAID or AHCI mode.
On a side note, there are newer revisions to this driver, namely 12.9.2.2000, 12.9.2.3000 and 12.9.2.4000.
They are available via Station Drivers Website, but I haven't tried them.