Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E. R." Newsgroups: alt.comp.os.windows-11,comp.os.linux.misc Subject: Re: Surviving Power Failures (was Re: Real-time OSs) Date: Fri, 15 Aug 2025 12:15:43 +0200 Lines: 30 Message-ID: References: <106mke5$1di32$1@dont-email.me> <3ihcmlx47d.ln2@Telcontar.valinor> <107070d$3hvho$1@dont-email.me> <1071hb2$3qqje$2@toylet.eternal-september.org> <1071jbr$3ra8s$1@dont-email.me> <10746fg$h625$2@dont-email.me> <20250808081850.00002e14@gmail.com> <1075pla$ukab$1@dont-email.me> <20250808144937.000021b1@gmail.com> <10761aq$vv6o$3@dont-email.me> <10777f7$17kq4$8@dont-email.me> <6uqkmlxjb8.ln2@Telcontar.valinor> <1079oe9$1ppd6$6@dont-email.me> <107ab26.3rg.1@ID-201911.user.individual.net> <3rkmmlxplv.ln2@Telcontar.valinor> <107cipt$2g8mr$9@dont-email.me> <107ghmk$3j56j$4@dont-email.me> <107kfi2$d4vh$21@dont-email.me> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net jAZpaBJlH/BHg/txsSpAHQCh67kP5mRYK3y+ytTbYD7Xvk3bB7 Cancel-Lock: sha1:k6zAqY6Fx0CQXR7eUZB5q0jKY1Y= sha256:8XJ/na23lKSW8rbmcESFp0tIzBBjJC46kHA6ajLG4MQ= User-Agent: Mozilla Thunderbird Content-Language: en-CA, es-ANY In-Reply-To: Xref: csiph.com alt.comp.os.windows-11:22175 comp.os.linux.misc:71193 On 2025-08-15 04:07, Lars Poulsen wrote: > On 2025-08-14, Carlos E. R. wrote: >> I do have an UPS at the router, which died soon. I don't know what >> failed sooner, the fibre or the ups. Supposedly the fibre is all optics >> to the exchange and should have survived. > > The vast majority of home computer UPSes are sized to keep a computer > running for 10 minutes, just so you can shut it down, although it may > be able to power the routers in your comms closet (and a WiFi access > point) for a few hours, so you can have Internet on your phone. I forgot to mention that the optimal solution is for the router to have its own battery. This will truly last hours. Having an UPS generating the mains AC voltage from a 12V battery, and then convert back to 12 VDC for the router, is a big waste. Alternatively, power the router via a 12 volt power supply with battery backup. > > Here in California, we have enough wildfire related outages that I > decided to put up a 14kW generator powered by natural gas, which > switches on automatically within 10 seconds if the grid power drops. > And I have a UPS for my computers and another for my comms closet so > that those stay up through the switchover. -- Cheers, Carlos E.R.