[dm-crypt] LUKS partition write-protected, mounting read-only

Arno Wagner arno at wagner.name
Wed Apr 27 02:44:38 CEST 2016

Just a guess, but maybe the second machine has limited ext4 support?
You could try with ext3 and see what happens.


On Wed, Apr 27, 2016 at 00:38:38 CEST, Serrano Pereira wrote:
> 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
> _______________________________________________
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> dm-crypt at saout.de
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Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
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