From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx3.wp.pl ([212.77.101.10]:35661 "EHLO mx3.wp.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934292AbcJQXuC (ORCPT ); Mon, 17 Oct 2016 19:50:02 -0400 Received: from out.poczta.wp.pl ([212.77.101.240]) (envelope-sender ) by smtp.wp.pl (WP-SMTPD) with SMTP for ; 18 Oct 2016 01:43:20 +0200 Date: Tue, 18 Oct 2016 01:43:20 +0200 From: "Komu Kadze" To: linux-btrfs@vger.kernel.org Subject: Recovering from disk failure (RAID5) Message-ID: <5805621878adb6.84965706@wp.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi, I have a BTRFS setup with 8 HDD stripped with RAID5. I know it’s mark as experimental, as it has problem with power failures. I decided to give it a shot. Last night one of the disks in the array failed, the OS decided to remount the FS into read-only mode. The data was still accessible. I started backing things up, but few hours later I started getting I/O errors. Currently I’m stuck at this: http://pastebin.com/n9cGVqJB With dmesg giving me this: http://pastebin.com/F5626BAc while trying to mount the FS (even with –o degraded) Kernel version: 4.4.0-42-generic Btrfs progs version: v4.7.2 Btrfs fi show: http://pastebin.com/X7Hpw2tb btrfs fi df: currently the file system is not mountable -- Komu