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=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 76A44C2D0DB for ; Sat, 25 Jan 2020 11:34:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 544D12071E for ; Sat, 25 Jan 2020 11:34:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727601AbgAYLeS convert rfc822-to-8bit (ORCPT ); Sat, 25 Jan 2020 06:34:18 -0500 Received: from mout.kundenserver.de ([212.227.126.134]:40315 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726194AbgAYLeS (ORCPT ); Sat, 25 Jan 2020 06:34:18 -0500 Received: from [192.168.177.20] ([91.63.166.203]) by mrelayeu.kundenserver.de (mreue012 [213.165.67.97]) with ESMTPSA (Nemesis) id 1MsrV2-1jk80G3FAu-00tBQu for ; Sat, 25 Jan 2020 12:34:16 +0100 From: "Hendrik Friedel" To: "Btrfs BTRFS" Subject: Broken Filesystem Date: Sat, 25 Jan 2020 11:34:10 +0000 Message-Id: Reply-To: "Hendrik Friedel" User-Agent: eM_Client/7.2.36908.0 Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Provags-ID: V03:K1:DY859uVZQaNAXCMyGbaS2RZXnoorRSNU23l67RHJD0b+m7M1jRL gTrUxoYk6g0kLeVY0U/ClpkCN+2/Za4jKJZNcDi0Gc0iedQZ9nhlJ2LICZnXDBwXrgKTwod IYW26jTtmXGkR3ynqmCVjekEo1tDGzos7xmEHmPrwo2l70Rvh9br0mOfLlT75TZLS8jnQMK eJ8na5OWJl4O0ZdG0uknQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:6W8ZjKA9+kw=:83QJ9h5adddC1Ksb5C76RM HRgrwesbfC5MnhBK7OTeTJ0jpeMTrwPxvpf3jxDSvYK+Xq0MjacC1bzrHG05NR8h7bZkGnE4X u+Q/eHHAKNVGTgLNeJ99wf/VLx3CNcwlThf1w/KSZQjv6wy1X1fwebjlzdgPXS3773fwz3KiP 4SE4xYPAz2aVDQ4SB+pp08SPSJ+RXSl6ZpRPJqWoVvyHeCf059cEt8VrFSZKHS6zZArqT1m14 pRzRttXNHBZ1XcG7oO1rW91gSbVsedLKdUK+GQbebnp3kUdV9dqCUiypaB1QGrZXwEVX4prT+ q/W1k4xerFm6b3Gk7Zo1SwnuccKkyVQTNKbC6ceiYY4wM+iJB6gV3BpZZxdsRnU84U4I5J3HA Rz+KRFzzFfkJSNeH1osBV7bj0CNwVSOmQlgGIy9uyEogWF40bz5yq6Ro07muAWHVVm/84phhT sk2xw1Vdr4SLSkK9esKNcqTBAE+s3micM8LJjGQHXeDExP3xow75cnn5/Vsmpkc7SWPwnNowg ZfK7qWdPBCvPNG+fWKZCE4BukaN0ySg7HIkokA816h6pftiL5H8Mf7+G5HzzEbOHuNH+6mFA5 NUYfxF2o5V6dMY7mKUNQ3c/v7lcHdzYY3KYjLcRj9QQLeEq/EnplyhwdrT+wluKuNvybyMECG TWHAKqM1LMNNaWml4GfeVBmURKzRWis3NeBReHj3Wp3nGWiXYGVlK054X1exV1Tbfq2heB0GK OeOpFgKnAyWkoTjHwzWICG96zdmqGvJnZ0P0C1yKFz8b2NBIrnM3cGtUqCTKZ28QAJPtgro76 RlOQxjOUCwoyywTMogqNIaijAVVVT1Yt0jVn3Y5G8xigHoWpIsSzk5OqqHpoGbSBAtRM6us Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hello, I am helping someone here https://forum.openmediavault.org/index.php/Thread/29290-Harddrive-Failure-and-Data-Recovery/?postID=226502#post226502 to recover his data. He is new to linux. Two of his drives have a hardware problem. btrfs filesystem show /dev/sda Label: 'sdadisk1' uuid: fdce5ae5-fd6d-46b9-8056-3ff15ce9fa16 Total devices 1 FS bytes used 128.00KiB devid 1 size 931.51GiB used 4.10GiB path /dev/sda The 4.1GiB are way less than what was used. We tried to mount with mount -t btrfs -o recovery,nospace_cache,clear_cache [Sat Jan 18 11:40:29 2020] BTRFS warning (device sda): 'recovery' is deprecated, use 'usebackuproot' instead [Sat Jan 18 11:40:29 2020] BTRFS info (device sda): trying to use backup root at mount time [Sat Jan 18 11:40:29 2020] BTRFS info (device sda): disabling disk space caching [Sat Jan 18 11:40:29 2020] BTRFS info (device sda): force clearing of disk cache [Sun Jan 19 11:58:24 2020] BTRFS warning (device sda): 'recovery' is deprecated, use 'usebackuproot' instead [Sun Jan 19 11:58:24 2020] BTRFS info (device sda): trying to use backup root at mount time [Sun Jan 19 11:58:24 2020] BTRFS info (device sda): disabling disk space caching [Sun Jan 19 11:58:24 2020] BTRFS info (device sda): force clearing of disk cache The mountpoint does not show any data when mounted Scrub did not help: btrfs scrub start /dev/sda scrub started on /dev/sda, fsid fdce5ae5-fd6d-46b9-8056-3ff15ce9fa16 (pid=19881) btrfs scrub status /dev/sda scrub status for fdce5ae5-fd6d-46b9-8056-3ff15ce9fa16 scrub started at Sun Jan 19 12:03:35 2020 and finished after 00:00:00 total bytes scrubbed: 256.00KiB with 0 errors btrfs check /dev/sda Checking filesystem on /dev/sda UUID: fdce5ae5-fd6d-46b9-8056-3ff15ce9fa16 checking extents checking free space cache cache and super generation don't match, space cache will be invalidated checking fs roots checking csums checking root refs found 131072 bytes used err is 0 total csum bytes: 0 total tree bytes: 131072 total fs tree bytes: 32768 total extent tree bytes: 16384 btree space waste bytes: 123986 file data blocks allocated: 0 referenced 0 Also btrfs restore -i -v /dev/sda /srv/dev-disk-by-label-NewDrive2 | tee /restorelog.txt did not help: It came immediately back with 'Reached the end of the tree searching the directory' btrfs-find-root /dev/sda Superblock thinks the generation is 8 Superblock thinks the level is 0 It did not finish even in 54 hours I am out of ideas. Can you give further advice? Regards, Hendrik