On 6/26/2012 12:00 PM, Kyle Waters wrote: > Due to nearby construction we have had a couple of power outages > recently and I've been asked to evaluate our batter backup system(we are > not able to put generators in place currently). I have a few questions > for other regarding there batter back up systems. Hi Kyle,
Before answering your qq with a big "it depends", i thought i'd point you to this http://www.apc.com/tools/ups_selector/ because honestly, it does depend on the size of the UPS and what you have running :) > What is a reasonable expectation for a rack mountable UPS to continue to > supply power during a power outage? I can keep all servers and switches running for 45 minutes, then i'm done. I've been very clear with my bosses that we can extended this, but at $. So they fully understand 45 minutes is what they get with the money they've invested. They also understand that there will be a need for battery replacement. I'm using several APC UPS 3000XL. > How much equipment do you generally put on one > UPS(servers,switches,routers)? on this part, i guessed though i'd love to hear what other say. As i say, i have several UPSs (all the 3000xl), so i have 1 power supply plugged into 1 3000xl and the other power supply from the same server plugged into the other (2 3000xl per rack, 3 racks). This way if i have a failure on one UPS, the server (hopefully) won't go down. The 3000xl has software that tells you how the batteries are and how big of a strain you're putting on things. It also provides the time estimate at current load, that it can support. > > Any software you have found that works well with CentOS to shut down the > servers at the appropriate time? no experience, would love to hear solutions from others > > How frequently should UPS be tested? How should they be tested? i check them about monthly, the software tells mes what my status is > How frequently do you replace batteries/UPS' due to failure? dpends on utilization i guess mj/v /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
