Your understanding of this topic seems to stem from something other than operating servers at large scale. Single bit errors are extremely common in the absence

Your understanding of this topic seems to stem from something other than operating servers at large scale. Single bit errors are extremely common in the absence of multiple bit errors. One of the reasons that memtest86+ is so thorough and weird is because these marginal bits are access-pattern-dependent. With the right access pattern certain defective drams will always yield SBEs without ever causing an MBE.