How accurate is S.M.A.R.T. for hard drives?

Google's study on disk reliability indicates that there is a fairly strong correlation between some types of errors reported by SMART and increased likelihood of failure. The issue is that the likelihood of failure is still less than 50% - for example the average drive that reports a scan error is still 70% likely to keep working just fine for at least the next 8 months. So you're faced with the question of whether or not to replace a drive that ~probably~ won't fail.
 
Yes. I have been saved 2x with SMART warnings with some old Maxtor drives. Granted, I do have a very good back up system and these drives didn't have anything important, but nevertheless I was able to avoid down time by ordering some new HDDs before they completely failed.
 

jsc

Champion
Moderator
Even keeping in mind what sminlal said, I, like Shado,w would not ignore a SMART warning.

Ignoring a SMART warning is worse than trusting your data to a backup system that you knew was 70% reliable.
 

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