From owner-freebsd-questions@freebsd.org Mon Oct 26 07:30:55 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id F1AED43D019 for ; Mon, 26 Oct 2020 07:30:55 +0000 (UTC) (envelope-from ralf-mardorf@riseup.net) Received: from mx1.riseup.net (mx1.riseup.net [198.252.153.129]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.riseup.net", Issuer "Sectigo RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CKRMg2rzBz3b5k for ; Mon, 26 Oct 2020 07:30:55 +0000 (UTC) (envelope-from ralf-mardorf@riseup.net) Received: from capuchin.riseup.net (capuchin-pn.riseup.net [10.0.1.176]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client CN "*.riseup.net", Issuer "Sectigo RSA Domain Validation Secure Server CA" (not verified)) by mx1.riseup.net (Postfix) with ESMTPS id 4CKRMY65fKzFgMR for ; Mon, 26 Oct 2020 00:30:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1603697449; bh=h52h1LfrlsNg5Hqxv3iM5TRPuU2ow0MKuB/Zh+OgGIA=; h=Date:From:To:Subject:In-Reply-To:References:From; b=gBSCMMMSRXAhDuC6A8p4HItmu3u8EjuK/RatpUCB16G4YxdFaLfzoEJL6hwR4XGqT B1fBIZDQN1BMD6sNArn8XqqhBrJIg2Koj7kQ6nQTObsprhKeR/AOXD3S/sFWExsGZ2 ECQm+DpZrWtW0ImYHkJVLMT2uqF+20Nz6+e6XqeE= X-Riseup-User-ID: B47636ADCB7D293661A871677B11ECCD91204CB23453A8BECCE9B08FB4AF0EB2 Received: from [127.0.0.1] (localhost [127.0.0.1]) by capuchin.riseup.net (Postfix) with ESMTPSA id 4CKRMY1J9Jz8t23 for ; Mon, 26 Oct 2020 00:30:48 -0700 (PDT) Date: Mon, 26 Oct 2020 08:30:44 +0100 From: Ralf Mardorf To: freebsd-questions@freebsd.org Subject: Re: What is the "better / best " method to multi-boot different OSes natively WITHOUT VirtualBox(es) ? Message-ID: <20201026083044.395e77e2@archlinux> In-Reply-To: <20201026082015.24287140@archlinux> References: <20201024111010.5c867e8540a369b826d26703@sohara.org> <20201025065025.6a13dc89@archlinux> <24469.26288.47199.882303@jerusalem.litteratus.org> <20201025135437.35b592a5@archlinux> <20201025225215.65cfca64@archlinux> <79CA7927-080F-4596-96CB-CEFB2322F062@kicp.uchicago.edu> <20201026082015.24287140@archlinux> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4CKRMg2rzBz3b5k X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=riseup.net header.s=squak header.b=gBSCMMMS; dmarc=pass (policy=none) header.from=riseup.net; spf=pass (mx1.freebsd.org: domain of ralf-mardorf@riseup.net designates 198.252.153.129 as permitted sender) smtp.mailfrom=ralf-mardorf@riseup.net X-Spamd-Result: default: False [-3.27 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; RWL_MAILSPIKE_GOOD(0.00)[198.252.153.129:from]; R_SPF_ALLOW(-0.20)[+mx]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[riseup.net:+]; DMARC_POLICY_ALLOW(-0.50)[riseup.net,none]; NEURAL_HAM_SHORT(-0.71)[-0.710]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:16652, ipnet:198.252.153.0/24, country:US]; RCVD_IN_DNSWL_LOW(-0.10)[198.252.153.129:from]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.97)[-0.971]; R_DKIM_ALLOW(-0.20)[riseup.net:s=squak]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.99)[-0.991]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[riseup.net:dkim]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Oct 2020 07:30:56 -0000 On Mon, 26 Oct 2020 08:20:15 +0100, Ralf Mardorf wrote: >Indeed, I've forgotten that some circuits contain big capacitors, so >discharging using a resistor is usually done (and sometimes even the >screwdriver is used, not recommended ;). Oops, I contradict myself. If the gear is powered, we better don't try to discharge a capacitor :D. If the gear isn't powered, we don't need galvanic isolation by a transformer. So I'm mistaken, galvanic isolation is not perfectly safe. But it's still better to isolate.