New DIsk seems to have the same SMART attributes as the old failing drive


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For a introduction to S.M.A.R.T, you can start here:

 

https://en.wikipedia.org/wiki/S.M.A.R.T.

 

As you read, you will find out that the system is not really that great of a predictor.  But it can indicate if a disk is starting to show some indication that it might be getting ready to fail.  Usually when a disk has failed catastrophically, you can't get a SMART report from it.  Remember that the SMART is controlled by the disk manufacturers.  They don't want to provide any information in such a fashion that would prompt a consumer to RMA a disk that might continue to function for months to years before it catastrophically fails.  Years of Unraid user experience has shown that certain parameters are really useful to determining disk health and those should be monitored.  You can find those attributes by going to   Settings   >>>    Disk Settings  >>>   Global SMART Settings

Edited by Frank1940
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