From: "John Stoffel" <john@stoffel.org>
To: Salatiel Filho <salatiel.filho@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Input/Output error reading from a clean raid
Date: Sun, 22 Jan 2017 19:18:19 -0500 [thread overview]
Message-ID: <22661.19403.314279.130591@quad.stoffel.home> (raw)
In-Reply-To: <CAGmni9p7T5VQsSGQrwkpYgV=H4B-pjXtg8TxnuWst-FQSJh_fA@mail.gmail.com>
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
next prev parent reply other threads:[~2017-01-23 0:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-22 14:08 Input/Output error reading from a clean raid Salatiel Filho
2017-01-23 0:18 ` John Stoffel [this message]
2017-01-23 14:42 ` Salatiel Filho
2017-01-23 16:12 ` John Stoffel
[not found] ` <20170123010334.GA7546@metamorpher.de>
2017-01-23 14:02 ` Salatiel Filho
2017-01-23 17:07 ` John Stoffel
2017-01-23 17:23 ` Wols Lists
2017-01-23 17:34 ` Andreas Klauer
2017-01-24 21:15 ` Salatiel Filho
2017-01-24 21:58 ` Wols Lists
2017-01-25 15:54 ` John Stoffel
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