Question Which SMART attributes are the most important to watch?

mundial

Reputable
Dec 31, 2017
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I know it's just for reference but SMART cannot totally relied upon. There are other issues than can affect disks that are never picked up by SMART.

People who've studied disk failures at scale will say to you that it's not the errors per se reported by SMART you need to worry about but the proliferation of these errors over a short time span. For example, if you check your disk and it has 63 reallocated sectors one week and 288 the next week - start to worry. But if that same disk has 63 reallocated sectors in week 1 and that remains steady in week 5 - well, it's not as concerning.

https://datarecoveryireland.ie/smart-disk-monitoring-no-longer-fit-for-purpose-in-the-ssd-era/
 
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Pimpom

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May 11, 2008
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I second that. I once had a 500GB HDD that developed a couple of bad sectors during a severe power fluctuation before I could shut down. The number of bad sectors never increased up to the time I upgraded to a larger drive a couple of years later.
 
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