Chapter 15: Storage management 
108  TruVision DVR 12HD User Manual 
 
3.  If you want to continue to use a HDD when the S.M.A.R.T. test has failed, check the 
box Use when the disk has failed to self-evaluate. Click Apply to save the 
settings. 
4.  Click Exit to return to live view. 
Bad sector detection 
You can improve the performance of your HDDs by ensuring that they have no bad 
sectors. Bad sectors can slow down an HDD when reading or writing data, for example.