bejhan 1 Posted February 25 Share Posted February 25 What is the significance of 78.4% in the S.M.A.R.T. details? Even the documentation has this exact value. I'd expect 100% if an attribute is "perfect" (on a new drive, for example) but all of my drives seem to be showing 78.4% at most. Thanks in advance. Quote Link to post Share on other sites
bejhan 1 Posted February 26 Author Share Posted February 26 After a bit of research, I've discovered that even though the maximum value of an attribute is 255, manufacturers choose a maximum value that suits them (usually a nice round number). In WD's case, they have chosen 200 (200 / 255 = 78.4%). I have an HGST drive that seems to be using 100 instead which results in 39.2%. Shane 1 Quote Link to post Share on other sites
Christopher (Drashna) 631 Posted March 10 Share Posted March 10 You mean the Load Cycle Count, specifically? Quote Link to post Share on other sites
bejhan 1 Posted March 10 Author Share Posted March 10 Actually, many attributes show this value. Quote Link to post Share on other sites
Rob Manderson 0 Posted March 16 Share Posted March 16 On 2/26/2021 at 9:50 AM, bejhan said: After a bit of research, I've discovered that even though the maximum value of an attribute is 255, manufacturers choose a maximum value that suits them (usually a nice round number). In WD's case, they have chosen 200 (200 / 255 = 78.4%). I have an HGST drive that seems to be using 100 instead which results in 39.2%. And that explains something that's puzzled me for years - why I have short bars, even on new drives, when 'longer bars are better. Most of my drives are seagate and hgst - and an awful lot of them show 39.2% or 78.4%. Quote Link to post Share on other sites
Christopher (Drashna) 631 Posted March 16 Share Posted March 16 Yeah, it's ... manufacturer fun. SMART really isn't a standard, it's more of a guideline, that a lot of manufacturers take a LOT of liberty with. NVMe health is a *lot* better, in this regards (it an actual standard). Quote Link to post Share on other sites
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