I know two datacenters in switzerland that instead go "the cheap way". For them, if a drive lasts 4 years instead of 8, it doesn't really matter, as in 4 years,

I know two datacenters in switzerland that instead go "the cheap way". For them, if a drive lasts 4 years instead of 8, it doesn't really matter, as in 4 years, drives will de better and consume less. Your redundancy must be top notch though.