From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 2E992158012 for ; Tue, 13 Sep 2022 05:50:50 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 68D58E08FE; Tue, 13 Sep 2022 05:50:43 +0000 (UTC) Received: from p-impout002.msg.pkvw.co.charter.net (p-impout002aa.msg.pkvw.co.charter.net [47.43.26.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 108E2E08F3 for ; Tue, 13 Sep 2022 05:50:42 +0000 (UTC) Received: from localhost ([96.28.177.163]) by cmsmtp with ESMTP id XyojoK7PrI7bCXyojoQf9d; Tue, 13 Sep 2022 05:50:42 +0000 X-Authority-Analysis: v=2.4 cv=AfCiolbG c=1 sm=1 tr=0 ts=63201a32 a=xqrt2BZAGHte7XHhrxJgbA==:117 a=xqrt2BZAGHte7XHhrxJgbA==:17 a=HpEJnUlJZJkA:10 a=VELIKHLFqGJ4NG68LEwA:9 Date: Tue, 13 Sep 2022 05:47:21 +0000 From: "Thomas Mueller" To: gentoo-user@lists.gentoo.org Subject: [gentoo-user] RE: [gentoo-user] Encrypted hard drives on LVM and urgent power shutdowns. References: <1b6f36dd-f378-2d04-3df1-0541b9d944e9@gmail.com> <550b03e7-d11e-2d01-f058-86069a45555b@iinet.net.au> <6e5fa1b1-305d-00aa-a02b-9ccc133a7986@gmail.com> X-CMAE-Envelope: MS4xfMvqp9gfP0L/KjBmA9nY+Ao7OTFOAl6p8j2/zEYgWy/nR1mTyDm42VJSyeMXdRMeD99czWrvNEMLCO7dDvJgzv5qVBw5tGyhphOHV66s8ZP1/o1FuJyZ ioVMW904IvuF17lC1aSQzY+yQvQ60lL/ysCDS+QPrluJGsVI6KAbTr/3ajBAm8Zd/GOm/1sgBA+nGw== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply Message-Id: <20220913055043.68D58E08FE@pigeon.gentoo.org> X-Archives-Salt: bcc8b8af-a1ba-43b9-a7bb-b0b2dab44cc9 X-Archives-Hash: 6c1d7f032e27886a57db1094cbfb7e79 from Laurence Perkins: > Some of the higher-end UPS models do have diagnostic modes for simulating various events to make sure the connected systems behave as desired. A very few of the consumer-grade ones do as well. But how to do it is model specific, > so you'll have to dig up the documentation. > Commercial-grade units also often have a DC port on the back so you can plug in larger battery banks and/or hotswap battery banks during extended outages. > If you want an arbitrarily large battery bank, just get a decent power inverter heavy enough to run your load and a battery float charger that can push enough amps to keep up, then put as big a stack of batteries as you like > between the two. The nicer inverters will even warn you when the batteries get low. > You can often get used batteries from the local automotive shop for just the core charge. Just because it can't provide 600 amps to start a car any more doesn't mean it can't provide 60 to run your computers. Obviously they'll > require more regular maintenance, but it's hard to beat the price. > LMP How would you physically connect the automotive battery to the computer, and would you need the shell of the old UPS? I have an old Tripp-Lite UPS, batteries are dead and no longer rechargeable. Would you connect only the computer, or would you connect the monitor as well? Would you connect networking equipment? Tom