Hi Chris, Not sure that was what I wanted to hear.
Second alternative I have is buying an APC batterypack for the RS1500. That would give me 15 more minute which is enough time for the gennie to kick in. Does anyone know a place in town where they would have something advanced as this battery pack? http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BR24BP (looking at the instruction manuals for the 2 UPSs i have, i just dont see how I am going to fit the batteries together.) rgds, Reinier Battenberg Director Mountbatten Ltd. +256 782 801 749 www.mountbatten.net Be a professional website builder: www.easysites.ug On Tuesday 22 September 2009 14:45:35 Chris Wilson wrote: > Hi Reinier, > > On Tue, 22 Sep 2009, Reinier Battenberg wrote: > > I have apcupsd running as a deamon and the system will in worst cases > > shutdown when there is X amount of time left in the batteries. The BIOS > > is configured to start up when power returns. Problem is: when power > > returns while the system is shutting down, the system seems to stay off. > > The BIOS never gets an event, so just shuts down the computer. Shutting > > down takes about 3 minutes, which is quite a lot. So, first question, > > how do you tell a shutting down machine that power is back, and it is > > not shutting down anymore, but rebooting? > > You need to use a UPS daemon that can tell the UPS to initiate a timed > (delayed) shutdown, and that does this automatically when it initiates a > software shutdown. This will cause the UPS to force a power cycle of the > server, bringing it back online. NUT does this, for example. > > > Secondly, we dont want these reboots. I can't buy an inverter with > > proper batteries, so I bought a second UPS ( RS 1500) , and placed it in > > series with the first one. Its a bit cheaper, so i placed it before the > > SmartUPS, and keep that one connected to the server over USB (and AC). > > > > This new UPS is not doing its job. If power goes off, it does switch to > > batteries, but the Smart UPS that it is feeding in to, immediatly > > switches to batteries, too. > > Chaining UPSes is generally considered a bad idea. APC recommends against > it. Most likely, the power quality emitted by the first UPS is not enough > to satisfy the second that the mains power is OK, so the second switches > to battery too. > > > I ran a few tests: > > > > With a disconnected RS1500 (no AC in) > > - Connect the RS1500 to a moniter, and the monitor works. > > - Connect the RS1500 to the second power-unit of the server. The led > > light on the server goes on, but on the server-side the power cable makes > > a funny sizzling noise. > > Nice :) Probably the server's PSU has little or no PFC and so its current > draw is not proportional to voltage, causing a huge inductor in the UPS to > vibrate violently (and eventually self-destruct or tear itself off the > motherboard). > > > - Connect the RS1500 to the Smart-UPS, the smart-UPS does not charge from > > the RS1500 batteries, and you do hear the sizzling sound on the Smart-UPS > > side. Also, the Smart-UPS indicates it has lost its power-source and it > > is running from batteries. > > - The orange LED is lit on the RS1500, which means, we are on battery > > now. There is no indication there is an overload. > > That's because the Smart-UPS is not pulling any power from it. > > > Plug the RS1500 in the grid > > - Light goes green, and the sizzling sound disappears. > > > > Question: is my RS1500 actually helping my Smart-UPS to feed the server > > with power? (and do i just need to add more batteries?) Or do i have a > > problem? > > No and yes. > > My advice would be to rip the batteries out of the RS 1500 and chain them > in parallel with the batteries of the Smart-UPS, by hanging wires out of > the side of the UPS case. > > Cheers, Chris. _______________________________________________ LUG mailing list [email protected] http://kym.net/mailman/listinfo/lug %LUG is generously hosted by INFOCOM http://www.infocom.co.ug/ The above comments and data are owned by whoever posted them (including attachments if any). The List's Host is not responsible for them in any way. ---------------------------------------
