Make sense of this S.M.A.R.T data please

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25 Oct 2007
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On my WD400JB Value is higher than Threshold, is that good or bad?

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It is good.

Value is the current reading from the drive.

Threshold is the lelvel at which a given attibute must fall below before the drive considers it has a problem.

Worst is the worst value the drive has ever returned.

The drive looks fine. The only possible cause for concern is the worse value of 4 in the HDA temperature attribute. This means that at some point the drive did get close to the fail value (threshold) of 0 for this attribute.
 
I'm not sure that temperature has a 'fail' threshold in the same way as reallocated sectors.
Looking at my WD drives (black and greens), current temperature is 150 - current C2 attribute value, suggesting a plausible 41°C at the time the data was read. Problem then is that the worst value suggests the drive once got to 146°C...
So either a) the drive has been over-cooked, b) the drive is reporting incorrect data, or c) I don't know how to interpret C2 for this drive.
Any reason you're worried about it?
 
The scale is unlikely to be linear. I wouldn't be too fussed about it anyway - what temperature it reached in the past isn't of any use to you other than curiosity - the current temperature is all you can control.

With HDDs at 41°C, I'd be starting to think about giving them a bit of airflow though.
 
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