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UBER is a metric for the rate of occurrence of data errors, equal to the number of data errors per bits read over the entire lifetime of an SSD. Mathematically: enter image description here

The numerator is the total count of data errors detected over the full TBW rating.

How can i get this value from S.M.A.R.T attributes?

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Or is there a better way to calculate the UBER value?

SamTh3D3v
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It turns out that the UBER (unrecoverable bit rate error) can be calculated based on the raw value of the attribute #ID 187, reported_Uncorrect. Several manufacturers tend to use different names for this attribute and that what create some confusion.

SamTh3D3v
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