From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.automatix.de ([213.131.255.221]:43365 "EHLO mail.automatix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752697AbbAZMZp (ORCPT ); Mon, 26 Jan 2015 07:25:45 -0500 Received: from [192.168.11.16] (vpn1 [213.131.255.219]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: jojo@automatix.de) by mail.automatix.de (Postfix) with ESMTPSA id D4C7C600A6 for ; Mon, 26 Jan 2015 13:16:33 +0100 (CET) Message-ID: <54C63021.8000502@automatix.de> Date: Mon, 26 Jan 2015 13:16:33 +0100 From: Juergen Sauer Reply-To: service@automatix.de MIME-Version: 1.0 To: linux-btrfs@vger.kernel.org Subject: Bug Report Data Rescue: btrfs send ... btrfs set prop on linux 3.18-2 on Arch Linux Content-Type: text/plain; charset=utf-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Moin, this weekend a ssd disk got an problem. No Problem, I thought... but real word acts sometime other the you think :) 1. Szenario I got an media Error on a ssd disk. So, I think trimming the whole device may work. Mounting the btrfs in rw is not possible anymore. Because the system is going to write on damaged blocks. Mounting ro is possible. So I tried to mount -o ro,subvol=/ /dev/sdl1 /mnt -> worked. The Try to send the ro-mounted subvol "rootfs", which I want to recover did not work: btrfs send -f /srv/backup/rootfs.btrfs rootfs ERROR: /mnt/rootfs is not read-only The try to change the ro-flag btrfs prop set rootfs ro true ERROR: failed to set flags for rootfs. Read-only file system was impossible. I think this is an Bug in btrfs send, not to check if an btrfs filesystem is mounted ro for refusing working. It may be much more easier to recover damaged systems, if such annoying thngs would not occour. mit freundlichen Grüßen Jürgen Sauer - -- Jürgen Sauer - automatiX GmbH, +49-4209-4699, juergen.sauer@automatix.de Geschäftsführer: Jürgen Sauer, Gerichtstand: Amtsgericht Walsrode • HRB 120986 Ust-Id: DE191468481 • St.Nr.: 36/211/08000 GPG Public Key zur Signaturprüfung: http://www.automatix.de/juergen_sauer_publickey.gpg -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlTGMCEACgkQW7UKI9EqarG8QwCgu80ihnBxKrnjy4rzzbrz6Riu wS0AoIEiNicS/6Zz12ct7T4fZncW5xsP =3PPi -----END PGP SIGNATURE-----