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However, I cannot imagine IBM selling a multi-million dollar machine to a large enterprise such as a bank for example that requires its cache batteries to be swapped out every time they have a power outage. I have personally worked on machines with over 100 of these which would translate to over $10,000 per outage!
Even harder to believe is that IBM would sell that machine to them and **NOT** tell them this is a requirement. (Because they do not tell them this.)
Even more harderer still to believe is that IBM Legal would allow them to sell this AND not tell them.
midrange.com
- Larry "DrFranken" Bolhuis
www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com
On 5/16/2015 4:02 AM, Holger Scherer wrote:
ok, lets name it like this - most of the controllers *Try* to recharge the battery, but most of them do not a good job. We checked this on several older or newer controllers using a break out cable and a voltage monitor. 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 temperature measure from the battery (which does have the cable). They send some millivolts to keep the voltage, but they cannot recharge a battery at a 70% level... If there was an unplanned outage, exchangeing the 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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