From nobody Fri Sep 23 23:37:49 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 4MZ7qs6f17z4dDQT for ; Fri, 23 Sep 2022 23:38:01 +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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4MZ7qr5GN1z3pnj for ; Fri, 23 Sep 2022 23:38:00 +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 4MZ7qp6vhtzDr26 for ; Fri, 23 Sep 2022 23:37:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1663976279; bh=0pRWU8Erx1qMHhheudovQmA+PeE7TOz2DZWv5AmOFjY=; h=Subject:From:To:Date:In-Reply-To:References:From; b=I3npdRSPN+1df4jAqXW+JRoFuDuz8mjShOrFLNJjXbc7RL+NUceysMfq5+Bnqxade FMcaf1CEVaMXMdre+mP1w5wtGFc04FjS0nP2xiL45AeNvLKpEJmlI+F7x/Tyjfj5+C cXcujQIulKemz4xmt467/mtwY/k8p6mh0/cWCxMU= X-Riseup-User-ID: E6D44E87AA694B02A331407482262085EC0CB80BC554FD6C67E5D393F0E813A1 Received: from [127.0.0.1] (localhost [127.0.0.1]) by fews2.riseup.net (Postfix) with ESMTPSA id 4MZ7qp2Zktz1yBd for ; Fri, 23 Sep 2022 23:37:58 +0000 (UTC) Message-ID: Subject: Re: data, metadata, backup, and archive integrity and correction From: Ralf Mardorf To: questions@freebsd.org Date: Sat, 24 Sep 2022 01:37:49 +0200 In-Reply-To: <7be8f47b-bfea-ef5a-7b59-2f94f8d310e2@holgerdanske.com> References: <7be8f47b-bfea-ef5a-7b59-2f94f8d310e2@holgerdanske.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: Sender: owner-freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org MIME-Version: 1.0 X-Rspamd-Queue-Id: 4MZ7qr5GN1z3pnj X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=riseup.net header.s=squak header.b=I3npdRSP; 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 [-4.20 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-0.998]; DMARC_POLICY_ALLOW(-0.50)[riseup.net,none]; R_DKIM_ALLOW(-0.20)[riseup.net:s=squak]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; RCVD_IN_DNSWL_LOW(-0.10)[198.252.153.129:from]; RWL_MAILSPIKE_GOOD(-0.10)[198.252.153.129:from]; FROM_EQ_ENVFROM(0.00)[]; ARC_NA(0.00)[]; MLMMJ_DEST(0.00)[questions@freebsd.org]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; ASN(0.00)[asn:16652, ipnet:198.252.153.0/24, country:US]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[riseup.net:dkim]; DKIM_TRACE(0.00)[riseup.net:+]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[3]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Fri, 2022-09-23 at 15:42 -0700, David Christensen wrote: > All versions of the photograph file opened correctly with a viewer.=C2=A0 > All photographs looked the same on the screen.=C2=A0 But, at least one fi= le > is corrupt.=C2=A0 Which file(s)?=C2=A0 I never figured it out.=C2=A0 I k= ept all > versions of the file.=C2=A0 (And, I have kept all camera media.) Hi David, I'm a digital photographer newbie. I started digital photography in 2020. For developing photos and more editing, graphic art, I'm using a Linux desktop machine, but most of the times an iPad Pro. I copy all my cam's SD data to my Linux desktop PC, my iPad Pro and to at least two USB HDDs (ext4 and hfs+ without journaling) in the first place. Before I format a SD again, I take a look at all copied photos using a viewer. The photo backup/archiving is completely "decoupled" from all other backup/archiving. Non-destructive editing of photos, done on different machines, in my experiences results in chaos. Way before verifying a probably corrupted backup, I already loose control. For example, it's already impossible to gain control over naming files of edited photos. Sharing edited photos among apps running on iPad OS already is a PITA, let alone sharing photos among operating systems. I've got tons of unneeded duplicates of some photos. Deleting a duplicated photo might render separately stored meta-data useless. Regards, Ralf