From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John Stoffel" Subject: Re: Input/Output error reading from a clean raid Date: Sun, 22 Jan 2017 19:18:19 -0500 Message-ID: <22661.19403.314279.130591@quad.stoffel.home> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Salatiel Filho Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Salatiel> I am trying to recover a few files from my backup. The Salatiel> backup is on a raid 5 + ext4. There are several files where Salatiel> i get I/O error. The raid appears to be clean and fsck shows Salatiel> no errors. Any ideas what could it be ? Salatiel> md1 : active raid5 sdd1[0] sdg1[4] sdf1[2] sde1[1] Salatiel> 3220829184 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU] Salatiel> bitmap: 1/8 pages [4KB], 65536KB chunk It would help if you could post the error(s) you're getting, along with any output from dmesg during that time. Have you done a full scan of the disk looking for errors? You might just have silent read errors in your array. So as root do: # echo check >>/sys/block/md??/md/sync_action where md?? is the name of your md array you want to check. You can get the name from: cat /proc/mdstat and of course it would help to post that info as well if you want more help. John