From nobody Fri Oct 11 08:39:56 2024 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 4XQ0S13z2Jz5YWj1 for ; Fri, 11 Oct 2024 08:40:01 +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 "R11" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XQ0S03VP8z41S1 for ; Fri, 11 Oct 2024 08:40:00 +0000 (UTC) (envelope-from ralf-mardorf@riseup.net) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=riseup.net header.s=squak header.b=mB4TCWQ6; 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; dmarc=pass (policy=none) header.from=riseup.net Received: from fews02-sea.riseup.net (fews02-sea-pn.riseup.net [10.0.1.112]) (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) (No client certificate requested) by mx1.riseup.net (Postfix) with ESMTPS id 4XQ0Rz4GG5zDqPJ for ; Fri, 11 Oct 2024 08:39:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1728635999; bh=1N+gZeMYArve+hrZ0q+eOTE1v6Hs99i6tu5ebegM7iQ=; h=Subject:From:To:Date:In-Reply-To:References:From; b=mB4TCWQ6Rn+3SZgITL8TMsY3kFp8TiKA3YrJkP1e18KkKxeEXZX9mgCEOxC0Q0ssS a2Y+gnCQImmH5uLL0KgzvVtTNYOMggUImpMfXSYWcVxrO5LFC2n7mIajcHj+4N0UP1 V090CsZ6cAXKKde38A2K6Bb+ZhY3kvQ0Wmh8/R9k= X-Riseup-User-ID: B726DC6D0B177AF7EECE866B8C6D9002495072B025040420289597731DC9A93B Received: from [127.0.0.1] (localhost [127.0.0.1]) by fews02-sea.riseup.net (Postfix) with ESMTPSA id 4XQ0Rz08f8zFtpX for ; Fri, 11 Oct 2024 08:39:58 +0000 (UTC) Message-ID: <396ccf3a13ac75765e9014588f2feacd70a38cd5.camel@riseup.net> Subject: Re: How to zero a failing disk drive before disposal? From: Ralf Mardorf To: questions@freebsd.org Date: Fri, 11 Oct 2024 10:39:56 +0200 In-Reply-To: References: <5117.1728561469@segfault.tristatelogic.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-questions@freebsd.org Sender: owner-freebsd-questions@FreeBSD.org MIME-Version: 1.0 X-Spamd-Result: default: False [-4.20 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; DWL_DNSWL_LOW(-1.00)[riseup.net:dkim]; NEURAL_HAM_LONG(-1.00)[-1.000]; SUBJECT_ENDS_QUESTION(1.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[riseup.net,none]; R_DKIM_ALLOW(-0.20)[riseup.net:s=squak]; R_SPF_ALLOW(-0.20)[+a:mx1.riseup.net]; RCVD_IN_DNSWL_LOW(-0.10)[198.252.153.129:from]; MIME_GOOD(-0.10)[text/plain]; RWL_MAILSPIKE_GOOD(-0.10)[198.252.153.129:from]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; DKIM_TRACE(0.00)[riseup.net:+]; RCVD_TLS_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; ASN(0.00)[asn:16652, ipnet:198.252.153.0/24, country:US]; ARC_NA(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; MISSING_XM_UA(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[]; MLMMJ_DEST(0.00)[questions@freebsd.org]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+] X-Rspamd-Queue-Id: 4XQ0S03VP8z41S1 X-Spamd-Bar: ---- On Thu, 2024-10-10 at 14:21 +0200, Matthias Apitz wrote: > Overwriting the data will not help. The reading head(s) could be > adjusted and read the data on the side of the old track. There is no side of an old track on a Shingled Magnetic Recording HDD, the tracks are overlapping. Apart from this triviality, what do you use to adjust the position of the heads, green glowing liquid or Tesla Colis? What is possible is by no means affordable for everyone. You have to be very special and have very specialised opponents for such forensic methods to come into question.