>In annual terms, 2.7% or the drives failed in 2012, 5.4% failed in 2013 and 47.2% failed in 2014. I can't figure out where that 47% number is coming from, if

>In annual terms, 2.7% or the drives failed in 2012, 5.4% failed in 2013 and 47.2% failed in 2014. I can't figure out where that 47% number is coming from, if the overall failure rate was 29.5%. It seems like 1008 out of 4289 drives failed in 2014, or 23.5%.