CONCORD QV5200 Manual page 97

Chapter 10 Device Setup
10.2 S.M.A.R.T.
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is used to detect and report various indicators of HDD reliability, so you can save data to another
source if the HDD is at risk of failure. You can also perform a test (there are three types available) to evaluate and detect potential drive errors.
Self-check Type: There are three types available:
Short: This test verifies major components of the
hard drive such as read/write heads, electronics and
internal memory.
Long: This is a longer test that verifies the above as
well as performing a surface scan to reveal
problematic areas (if any) and forces bad sector
relocation
Conveyance: This is a very quick test that verifies the mechanical parts of the hard drive are working.
Note: When performing a test, your DVR will continue to work as normal. If an HDD S.M.A.R.T error is found, the HDD can continued to be used, but
there will be a risk of losing recorded data. It is recommended to replace the HDD with a new one. Talk to your place of purchase about this
procedure, do not attempt it yourself.