Ram errors can lead to file corruptions, which can lead to crashes/unstable operation:
http://www.zdnet.com/blog/storage/dram-error-rates-nightmare-on-dimm-street/638
DRAM error rates: Nightmare on DIMM street posted:
A two-and-a-half year study of DRAM on 10s of thousands Google servers found DIMM error rates are hundreds to thousands of times higher than thought — a mean of 3,751 correctable errors per DIMM per year.
This is the world’s first large-scale study of RAM errors in the field. It looked at multiple vendors. . . . . . . .
Edit: the above listed article is discussing errors from good/stable ram. Even good ram can corrupt files.
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