From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBB50C433DF for ; Sat, 23 May 2020 23:21:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ADD4A20735 for ; Sat, 23 May 2020 23:21:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=colorremedies-com.20150623.gappssmtp.com header.i=@colorremedies-com.20150623.gappssmtp.com header.b="N5jN8EiH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388047AbgEWXVv (ORCPT ); Sat, 23 May 2020 19:21:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388010AbgEWXVv (ORCPT ); Sat, 23 May 2020 19:21:51 -0400 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4230C061A0E for ; Sat, 23 May 2020 16:21:50 -0700 (PDT) Received: by mail-wm1-x333.google.com with SMTP id c71so1527453wmd.5 for ; Sat, 23 May 2020 16:21:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=colorremedies-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=5LD3PHJkCZ//stLTmXPZ9wkFEdR5qZBQ+05z24HzKQo=; b=N5jN8EiHWQDeipblaSDtZlQrJc7I8pjP5Zy6hJton3csaXAyHg1IrFD/Ot1gpNXbAw pbvLosv9PFit3F4cBfwjXQFujvL0i3zPvECZ9He9oNoWM9wKJNH1gkoF30YR/XyZAowf 53FSQrOrcBmMwo51NgCLV+krE4GXoMmmO5l691wrzpAOp+vtu54TY3VjEB/UiBm8fdd+ Eg3G95VysHbIRZk4YJS1qBAenk75RtHv6DmJXJiEvUokGFC63eWKYJ24uPQWRNLL/vYU i8a90pTb3W2tz7LGJb9jYbAdV5QIIbBZxXUJah2vb9dKtXMKR+SDckHeKZUBnfNULQSB 2vlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=5LD3PHJkCZ//stLTmXPZ9wkFEdR5qZBQ+05z24HzKQo=; b=JmtUf8f/bb39bV8pCeH9NiYo5nYELmUfTR+b9cCGMu4p0ED5AlyWqKQvcy2CPJ/FFS 8y8jYCdPLLTj84gUvw6uN5xJjTSWGEsRa1aOjJrIuc0Rj7WTVgHEs7Fxq7tthKM1PpAC GVZ2mVTGa83470NndW3jsBPALP1nsCXW4fnlgZC8O5xlq+nzOG2L8yRHZWP0nteCa/R5 iTVKqPWKchLB2bDa2O33KuNE3AIUg6413nvW73mUxQQho78Nm1WiqTCL4CSc1qCg5Vrs ealpy6/ESGjhB+lXcp1faASCKOrDidAtHxsYT0pyV3GTq/lbCldB/V21B2VQYruiX9V9 Z4kw== X-Gm-Message-State: AOAM530PKCa4Q15tA91GyWeWvdmgKQJ8XXDMQHGqZlL5p2zGUL12QVtW l6W0+VTBC+IIJpRRJ5SwvXw/fXS/fpJ3AoxMtE3Scw== X-Google-Smtp-Source: ABdhPJyVJgxxJVpDY9insgMX6W4W7G8Oh6wrR0fBtN3/ValDDe+pJNsgheDGKqmofXkzKWCVe0Ap8/pllpiRBgywY/0= X-Received: by 2002:a05:600c:2219:: with SMTP id z25mr18406362wml.128.1590276109183; Sat, 23 May 2020 16:21:49 -0700 (PDT) MIME-Version: 1.0 References: <1e6bc0e299901f90613550570446777fbccdc21e.camel@seznam.cz> <139f40a70cf37da2fef682c5c3d660671d8af88d.camel@seznam.cz> <3bc39223e567b7a4eca13bc554c74ef0c36fbaf2.camel@seznam.cz> In-Reply-To: <3bc39223e567b7a4eca13bc554c74ef0c36fbaf2.camel@seznam.cz> From: Chris Murphy Date: Sat, 23 May 2020 17:21:33 -0600 Message-ID: Subject: Re: I can't mount image To: =?UTF-8?B?SmnFmcOtIExpc2lja8O9?= , Btrfs BTRFS Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Sat, May 23, 2020 at 8:38 AM Ji=C5=99=C3=AD Lisick=C3=BD wrote: > > [root@localhost-live tmp] # btrfs rescue super -v /dev/loop4 > All Devices: > Device: id =3D 1, name =3D /dev/loop4 > > Before Recovering: > [All good supers]: > device name =3D /dev/loop4 > superblock bytenr =3D 65536 > > device name =3D /dev/loop4 > superblock bytenr =3D 67108864 > > [All bad supers]: > > All supers are valid, no need to recover OK. So they're good. > > > > [root@localhost-live tmp]# mount -o ro,recovery /dev/loop4 ./mnt > mount: /home/jirka/tmp/mnt: can't read superblock on /dev/loop4. But it can't be read? This doesn't make sense. What kernel messages are reported at the time of the mount attempt? When using a newer kernel, the recovery command is deprecated but should still work. The new command is 'usebackuproot' What do you get for: # btrfs insp dump-s -fa /dev/ --=20 Chris Murphy