Greetings! 
  
We have had this DS2 running for about 10 years or so with 9 cameras.  It began turning off recording after 2 or so hours.  The drives AND fans were getting noisy, so I replaced both (2 drives, 2 fans).  I used the recommended HDs.  Very quiet now, but still shuts off recording after about 2 to 6 hours.  Checked power supply and under load does not seem excessively noisy and meets posted requirements per the PSU label.  I have been unable to find anyone with any serious fix methods for this problem.  Does anyone here have any experience with this security DVR?