From nobody Sat Jan 15 07:56:27 2022 X-Original-To: questions@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 8B2061956E28 for ; Sat, 15 Jan 2022 07:56:36 +0000 (UTC) (envelope-from ralf-mardorf@riseup.net) Received: from mx1.riseup.net (mx1.riseup.net [198.252.153.129]) (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-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mx1.riseup.net", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JbVqR54gKz4RqW for ; Sat, 15 Jan 2022 07:56:35 +0000 (UTC) (envelope-from ralf-mardorf@riseup.net) Received: from fews2.riseup.net (fews2-pn.riseup.net [10.0.1.84]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mail.riseup.net", Issuer "R3" (not verified)) by mx1.riseup.net (Postfix) with ESMTPS id 4JbVqJ2kLYzDxb5 for ; Fri, 14 Jan 2022 23:56:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1642233388; bh=rU1CAw5d0OPTCU7hxsaPRMkhiHnVQCVvFbbUm/8izaU=; h=Date:From:To:Subject:In-Reply-To:References:From; b=BjRpYVxcTslYTkFctHOIUyIg+61P1dN7ERv3z5JCsawy7KZgt6+eOSWDse/DZLY6G vSCggo25TJTp+0XpNQR5eLZkXHaZE+AK/n3ZvOSWgZkKkQ6+W+5wH1uoFA26uiE2w7 GyANux7kLeilQWI7FqUgbynbjXZ4s3hptEwSi5D0= X-Riseup-User-ID: 45DCE2A2057FC668E16920D3F8053A7FE1BE48C797B126ECFF64359E8535E173 Received: from [127.0.0.1] (localhost [127.0.0.1]) by fews2.riseup.net (Postfix) with ESMTPSA id 4JbVqH570Nz1yT2 for ; Fri, 14 Jan 2022 23:56:27 -0800 (PST) Date: Sat, 15 Jan 2022 08:56:27 +0100 From: Ralf Mardorf To: questions@freebsd.org Subject: Re: zero filling a storage device (was: dd and mbr) Message-ID: <20220115085627.37bc4bef@archlinux> In-Reply-To: References: <77680665-7ddb-23c5-e866-05d112339b60@holgerdanske.com> <20220114023002.GP61872@eureka.lemis.com> <20220114045558.GQ61872@eureka.lemis.com> List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4JbVqR54gKz4RqW X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=riseup.net header.s=squak header.b=BjRpYVxc; 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 [-4.60 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[riseup.net:s=squak]; NEURAL_HAM_LONG(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; RWL_MAILSPIKE_GOOD(0.00)[198.252.153.129:from]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[riseup.net:dkim]; RCVD_COUNT_THREE(0.00)[3]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; DKIM_TRACE(0.00)[riseup.net:+]; DMARC_POLICY_ALLOW(-0.50)[riseup.net,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; MLMMJ_DEST(0.00)[questions]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_NOT_FQDN(0.50)[]; ASN(0.00)[asn:16652, ipnet:198.252.153.0/24, country:US]; RCVD_TLS_ALL(0.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[198.252.153.129:from] X-ThisMailContainsUnwantedMimeParts: N On Sat, 15 Jan 2022 04:54:01 +0100, Tomasz CEDRO wrote: >Another thing is that there is no guarantee what happens on the plate >because disk firmware can do all sorts of the trick on-the-fly between >plate and the interface.. I guess this is not very different between >HDD and SSD.. Hi, https://en.wikipedia.org/wiki/Shingled_magnetic_recording#Device-managed Regards, Ralf