From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <serrano.pereira@gmail.com>
Received: from mail-wm0-x236.google.com (mail-wm0-x236.google.com
 [IPv6:2a00:1450:400c:c09::236])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (No client certificate requested)
 by mail.server123.net (Postfix) with ESMTPS
 for <dm-crypt@saout.de>; Wed, 27 Apr 2016 00:38:40 +0200 (CEST)
Received: by mail-wm0-x236.google.com with SMTP id u206so25033381wme.1
 for <dm-crypt@saout.de>; Tue, 26 Apr 2016 15:38:40 -0700 (PDT)
Received: from [192.168.1.20] (ip192-163-173-82.adsl2.static.versatel.nl.
 [82.173.163.192])
 by smtp.googlemail.com with ESMTPSA id k139sm5265226wmg.24.2016.04.26.15.38.38
 for <dm-crypt@saout.de> (version=TLSv1/SSLv3 cipher=OTHER);
 Tue, 26 Apr 2016 15:38:39 -0700 (PDT)
From: Serrano Pereira <serrano.pereira@gmail.com>
Message-ID: <571FEDEE.7030904@gmail.com>
Date: Wed, 27 Apr 2016 00:38:38 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Subject: [dm-crypt] LUKS partition write-protected, mounting read-only
List-Id: <dm-crypt.saout.de>
List-Unsubscribe: <http://www.saout.de/mailman/options/dm-crypt>,
 <mailto:dm-crypt-request@saout.de?subject=unsubscribe>
List-Archive: <http://www.saout.de/pipermail/dm-crypt/>
List-Post: <mailto:dm-crypt@saout.de>
List-Help: <mailto:dm-crypt-request@saout.de?subject=help>
List-Subscribe: <http://www.saout.de/mailman/listinfo/dm-crypt>,
 <mailto:dm-crypt-request@saout.de?subject=subscribe>
To: dm-crypt@saout.de

Hello,

When I create a LUKS partition like so:

$ cryptsetup luksFormat /root/test
$ cryptsetup open /root/test test
$ mkfs.ext4 -j /dev/mapper/test
$ mount /dev/mapper/test /mnt/files

Then I can create files in /mnt/files just fine. But when I copy
/root/test to a different computer, and then do:

$ cryptsetup open /root/test test
Enter passphrase for /root/test:
mount: /dev/mapper/test is write-protected, mounting read-only
$ mount /dev/mapper/test /mnt/files

As you can see, the device is mounted read-only. I cannot write any
files to the LUKS partition. Why is this so? How can I write to the
partition on another computer?

Regards,
Serrano