Re: Cache Battery question -- MIDRANGE-L

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ok, lets name it like this - most of the controllers *Try* to rechargethe battery, but most of them do not a good job. We checked this onseveral older or newer controllers using a break out cable and a voltagemonitor.


For example, the old 2740/2748 do not really charge
(as they do not have electronics for this), they try to keep 3.6V
which is not enough for 3.6V Batteries.

Same with the newer LiIo controllers which do not do a temperaturemeasure from the battery (which does have the cable). They send somemillivolts to keep the voltage, but they cannot recharge abattery at a 70% level... If there was an unplanned outage, exchangeingthe battery is a good idea.


-h




Am 16.05.15 um 08:02 schrieb DrFranken:

That's not correct, the controllers DO charge the batteries. Think about
what would happen if they didn't, you lose power for a few hours and
your server goes down. The battery holds the cache during that time and
of course discharges partially in that effort. When power is restored
you bring up the system no problem.  If the batteries did not get
charged by the controller then the remaining battery life might not be
sufficient to hold up the cache during your next outage.

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