Yeah, because the controller is what copies all the data to the drive, and replicates the data onto the other drive.
It's not exactly a physical fault by the looks of it. But the controller is causing the fault.
Its probably the reason why both drives corrupted, because one drive generated a fault, which caused a computer crash. The system then re-built itself over the course of 2 hours, copying data from one drive to the other as it does, verifying data. Result? 2 corrupted drives.
I'm yet to install Windows 7 again, but I probably will tomorrow