From nobody Wed Apr 12 03:19:24 2023 X-Original-To: freebsd-hackers@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 4Px7H53z0wz456y4 for ; Wed, 12 Apr 2023 03:19:29 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (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 "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Px7H447qVz4SNW; Wed, 12 Apr 2023 03:19:28 +0000 (UTC) (envelope-from eugen@grosbein.net) Authentication-Results: mx1.freebsd.org; none Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221] (may be forged)) by hz.grosbein.net (8.17.1/8.17.1) with ESMTPS id 33C3JPk4096443 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 12 Apr 2023 03:19:26 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: grahamperrin@freebsd.org Received: from [10.58.0.11] (dadvw [10.58.0.11] (may be forged)) by eg.sd.rdtc.ru (8.16.1/8.16.1) with ESMTPS id 33C3JOVZ011148 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 12 Apr 2023 10:19:24 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: gpart destroy, in depth To: Graham Perrin , Dmitry Morozovsky References: <64e88636-1e03-7ff5-7d3f-e8a36117cdbe@freebsd.org> <29390cd8-56cd-aced-990a-f2b25a00aaed@freebsd.org> Cc: freebsd-hackers@FreeBSD.org From: Eugene Grosbein Message-ID: <3942716f-076b-6d06-26fe-0d44087ac779@grosbein.net> Date: Wed, 12 Apr 2023 10:19:24 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 In-Reply-To: <29390cd8-56cd-aced-990a-f2b25a00aaed@freebsd.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT autolearn=disabled version=3.4.6 X-Spam-Report: * -0.0 SHORTCIRCUIT No description available. * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on hz.grosbein.net X-Rspamd-Queue-Id: 4Px7H447qVz4SNW X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/32, country:DE] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N 12.04.2023 0:46, Graham Perrin wrote: > On 11/04/2023 14:32, Dmitry Morozovsky wrote: >>> … >> I suppose sysutils/testdisk will be useful for recovering, as most of actual >> file systems are left intact > > > Thanks, I forgot that the utility has this capability. > > This reignites hope of recovery without a third party. > > Re: my question to Warner about preciseness, now I realise, the answer is almost certainly "Yes", because the manual page for gpart(8) notes that the 'restore' argument/command, which does not affect the content of partitions, can be preceded by destruction (-F). > > Also, thanks to the people who responded privately. I did it previously. Just create same partition at same offset and same length and you get file system back.