Date: Wed, 16 Oct 2013 12:35:32 +1000 From: yudi v <yudi.tux@gmail.com> To: Frank Leonhardt <frank2@fjl.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: UPS buying suggestion Message-ID: <CACo--mtr4Uj5KCY3E5UY7HGS9_t%2Bwi9a3ipvsa_9K_aV=V9FdQ@mail.gmail.com> In-Reply-To: <525D225B.7050205@fjl.co.uk> References: <CACo--msUpY-6r7MkuEvrPDpSVdFZyBotSA-eS7aLGMFDeq_vDQ@mail.gmail.com> <525D225B.7050205@fjl.co.uk>
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> > APC BackUPS Pro 420 to keep three HP microservers alive. What!? Yes, it > works. The power they draw varies greatly depending on what type and how > many drives you have in the bays and (I think with the Microservers) their > processing workload. > Nice to know you got 3 servers running off a 420 VA unit, surprising it can handle 3 units when the power goes off. > All servers are, by definition, connected to the network. They can ping > equipment nearby (just do it from a shell script). If they ping several > pieces of kit on the LAN that don't have a UPS and get no reply, repeatedly > for a few minutes) then it can be assumed something's up, and they can shut > down. As a cross-check they can ping other kit on a UPS and if that's still > alive it proves the NIC is okay. In the event of a suspected failure the > script writes what it's done in a log, emails it to me (for later) and > calls shutdown. > > Nice implementation but I want to have my back-up server in S1 state when not in use, running PING constantly is not possible. Also, I don't have so many devices that need UPS. > > So, what I look for in a UPS is a good automatic self-test (i.e. a "smart" > one) and a standard and easy to change battery (the 7Ah type are cheap, > plentiful and are thus well refined). > > Agreed, having a standard and easy to change battery is preferable but how do I tell what type of battery an UPS takes? I am also looking at APC Smart-UPS SC 420VA 230V<http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SC420I&total_watts=50&tab=models>, within my budget, it's got AVR, and user replaceable battery, but cannot tell whether it accepts a generic one. -- Kind regards, Yudi
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