Re: ECC support
Bob Bishop <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.hardware,gmane.os.freebsd.devel.hackers |
|---|---|
| Message-ID | <[email protected]> |
> On 16 Sep 2015, at 12:52, Igor Mozolevsky <[email protected]> wrote: > > On 16 September 2015 at 12:34, Bob Bishop <[email protected]> wrote: > > <snip> > > >> "The best we can conclude therefore is that any chip size effect is >> unlikely to dominate error rates given that the trends are not consistent >> across various other confounders such as age and manufacturer.” >> >> I’ll admit to talking that point up a bit but it is counterintuitive. >> Memory designers have always been scared of cosmic rays etc but the >> suspected effects simply have not been noticeable. Most likely as they >> shrink features ever smaller, other factors like material purity dominate. >> > > I saw that after I posted, and had a long ponder as to why it would be so. > The only thing I could think of is that the fab process was(/is?) large > enough to not worry about "nonsense" like cosmic rays &c (but then I've not > had much exposure to semi-conductor electronics theory since late 90s). > Perhaps we're at a point where the fab process can't really shrink much > more with DRAM due to the underlying tech (effectively many tiny RC > circuits), which is the reason the manufacturers just stack ranks to get > more capacity per DIMM instead of packing more in a single chip?.. Dunno. I’ll ask my tame semiconductor expert when I see him tomorrow... > -- > Igor M. > _______________________________________________ > [email protected] mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hardware > To unsubscribe, send any mail to "[email protected]" -- Bob Bishop [email protected] _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[email protected]"