From owner-freebsd-questions@freebsd.org Wed Oct 28 08:11:20 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 1E24743EF78 for ; Wed, 28 Oct 2020 08:11:20 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from mailout.qeng-ho.org (mailout.qeng-ho.org [217.155.128.244]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4CLh9M2X5Xz3X0k for ; Wed, 28 Oct 2020 08:11:19 +0000 (UTC) (envelope-from freebsd@qeng-ho.org) Received: from arthur.home.qeng-ho.org (unknown [IPv6:2a02:8010:64c9:1::2]) by mailout.qeng-ho.org (Postfix) with ESMTP id 91CA02E08A; Wed, 28 Oct 2020 08:11:12 +0000 (GMT) Subject: Re: What is the "better / best " method to multi-boot different OSes natively WITHOUT VirtualBox(es) ? To: Ralf Mardorf , freebsd-questions@freebsd.org References: <20201024123148.4929fb9e.freebsd@edvax.de> <20201028073644.52fed6c6@archlinux> From: Arthur Chance Message-ID: Date: Wed, 28 Oct 2020 08:11:10 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20201028073644.52fed6c6@archlinux> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4CLh9M2X5Xz3X0k X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of freebsd@qeng-ho.org designates 217.155.128.244 as permitted sender) smtp.mailfrom=freebsd@qeng-ho.org X-Spamd-Result: default: False [-2.37 / 15.00]; SUBJECT_ENDS_QUESTION(1.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:217.155.128.240/29]; NEURAL_HAM_LONG(-1.00)[-0.995]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[qeng-ho.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_HAM_SHORT(-1.04)[-1.044]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_MEDIUM(-1.03)[-1.026]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; ASN(0.00)[asn:13037, ipnet:217.155.0.0/16, country:GB]; 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: Wed, 28 Oct 2020 08:11:20 -0000 On 28/10/2020 06:36, Ralf Mardorf wrote: > On Tue, 27 Oct 2020 23:57:05 +0000 (UTC), doug@safeport.com wrote: >> I would be interested in opinions on the best hard disks. > ^^^^^^^^ > a good chosen word, since not many > undisputed facts do exist > > In my experiences a batch of series x of vendor y could be very good or > bad and for the next batch it could be vice versa or a good series is > discontinued. Interesting are statistics from Google. I don't have a > link at hand, but I remember that they successfully used consumer > instead of enterprise disks and IIRC what Google experienced with > countless disks, was similar to my experiences with just a few disks. I > read an article years ago. I suspect you mean Backblaze rather than Google. Here's a link to their page on hard drives https://www.backblaze.com/b2/hard-drive-test-data.html You can get to the quarterly stats and useful hints from there. > IOW related to the lifespan it seems to be a lotto draw. > > Related to performance simple technical facts and clear measurements > do exist. It was already hinted by this thread. > > Shingled magnetic recording makes drives inexpensive, because it does > increase storage capacity. Due to the procedure it is required to > rewrite tracks, which results in performance lags. Different SMR drives > suffer from different performance lags. However, more expensive drives, > not using SMR technology tend to be faster when writing data. > > In the end you need to read a lot of papers and decide on your own what > is "the best" for you or in your opinion. And know that will change a few months later anyway. :-) -- The number of people predicting the demise of Moore's Law doubles every 18 months.