From owner-freebsd-questions@freebsd.org Mon Oct 26 15:30:20 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 3F570447C4C for ; Mon, 26 Oct 2020 15:30:20 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CKf0q37W4z4Msd for ; Mon, 26 Oct 2020 15:30:19 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: by mail-wr1-x42a.google.com with SMTP id g12so13094181wrp.10 for ; Mon, 26 Oct 2020 08:30:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mBaBB6BE0g+6mehVLicOszrbaRWE0Gl4IKA3wXCw6Wk=; b=OsBKw2ceX4FzPuLSMLrdQLXkBiDJMI+YPH0dpBwDJjxS9P88AvZUSCarYqax0IW6Kl TtGpQXQFCdUapkc7G7uMuqCgREKOGmXJVSoFW5265vKGihvLK2auGuzdLEaztqREdB72 jlHhCyjz3awxnk6M69eU8qkEfvAqdCJSj9az3YNllrqsqXWpi4P1uSosqlnDd0gcEUmV j399nlll4Gl854MYLYcbVF5m8thEhPNVIEeFQAYCNrcmf8kbLg7WWaC6FDrlk4QY6YyY pWEDcJEW7qL5CjtysiKG+gDQXnow8kRWZz4zj3gz26HEPzjkLKrBSKJukPeIOm1Gym3O oEHg== X-Gm-Message-State: AOAM530MH5zDg4k5e3Cxgi99ySVdemFTvMQedCA9yxpl+ITV1GUJ4jNX sEWaWqNOFTga3aqjjeqyjeMzqW9qw5cwmA== X-Google-Smtp-Source: ABdhPJxSU0uASmy5NTZRA7O33wOZSRRO6z5IpKr1ykmJMPE3P7hO6b49NlgBmQFxZnZJufdppBei8w== X-Received: by 2002:adf:94e3:: with SMTP id 90mr17181292wrr.380.1603726217635; Mon, 26 Oct 2020 08:30:17 -0700 (PDT) Received: from gumby.homeunix.com ([2.121.231.131]) by smtp.gmail.com with ESMTPSA id 26sm8494522wmk.42.2020.10.26.08.30.15 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2020 08:30:16 -0700 (PDT) Date: Mon, 26 Oct 2020 15:30:12 +0000 From: RW To: freebsd-questions@freebsd.org Subject: Re: What is the "better / best " method to multi-boot different OSes natively WITHOUT VirtualBox(es) ? Message-ID: <20201026153012.0cf46ec8@gumby.homeunix.com> In-Reply-To: <20201025173321.8adee3e5.freebsd@edvax.de> References: <20201024111010.5c867e8540a369b826d26703@sohara.org> <20201025065025.6a13dc89@archlinux> <20201025173321.8adee3e5.freebsd@edvax.de> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; amd64-portbld-freebsd12.1) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4CKf0q37W4z4Msd X-Spamd-Bar: - X-Spamd-Result: default: False [-1.03 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_FROM(0.00)[googlemail.com]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[googlemail.com:+]; DMARC_POLICY_ALLOW(-0.50)[googlemail.com,quarantine]; RECEIVED_SPAMHAUS_PBL(0.00)[2.121.231.131:received]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[googlemail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; DWL_DNSWL_NONE(0.00)[googlemail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.98)[-0.977]; R_DKIM_ALLOW(-0.20)[googlemail.com:s=20161025]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-0.996]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_SPAM_SHORT(0.95)[0.947]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::42a:from]; 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 15:30:20 -0000 On Sun, 25 Oct 2020 17:33:21 +0100 Polytropon wrote: > On Sun, 25 Oct 2020 06:50:25 +0100, Ralf Mardorf wrote: > > I also want to add for consideration, if reboots between operating > > systems are often wanted and HDDs are used, it's way better when all > > drives, even the unused drives are spinning all the time. Parking > > and releasing heads very often, does shorten the life span the > > most. I think this is mostly a myth. Manufactures specify a figure for this of, IIRC, around 150k cycles. Drives that are switched-off a few time a day never reach anything like that. A few year ago Western Digital made some green drives, with extremely aggressive power saving, that parked within seconds. With some usage patters these could fail in months. I think it was around this time that people started talking about heads as if they were like sledge hammers. > I don't know if this is still true, but in ye olden times, > there was a distinction between "home PC disks" and "server > disks"... > > dislikes ... running all the time And they aren't designed to take the same levels of reads and writes. > Probably modern disks tend to be more like server disks, > even when being sold for and used in home PCs... :-) These days home drives at 2TB or bigger are usually shingled - often without any mention, even on the data sheets. Typically there's a more expensive version aimed for use in RAID that isn't shingled. Another difference is that home drives try very much harder to recover data, whereas a drive intended for RAID is programmed to fail quickly and leave it to the redundancy.