The answer you received is more than likely incorrect. The real problem is with the Intel hardware itself. I just received a brand new Alienware system and had this problem occur. Did some testing after having rebuilt the RAID 10 array from scratch, guess what? The Intel hardware appears to NOT be able to consistently recover from a single drive failure. This RAID controller should not be used at all until these issues are fixed. Read the many other posts with this very same issue. Everyone has been complaining for months about this problem.