On Fri, 2019-10-11 at 21:27 -0400, Sam Varshavchik wrote:
Maybe I'm off base, but who still puts button cell batteries on
their
motherboards?
Just about every board I've seen... It's for the clock, more than
anything else. I've seen (old) systems that used a rechargeable
battery, instead, but then you have some very expensive and hard to
find battery to replace every few years, as opposed to an ordinary
battery cell you can buy from anywhere for peanuts.
Of course, you could forgo a battery-powered clock on a 24/7 server,
but I've not seen that offered anywhere. I've got a battery-less NAS,
and it powers-up with the wrong time, and logs everything incorrectly
until the clock syncs up. They could have put a large value capacitor
in there, to keep the time ticking over until power is restored (like
the old VCRs used to do).
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