I read this http://mybookworld.wikidot.com/encrypted-filesystem but I did not want to encrypt the whole disk, so I found how to do encryption on the loop device, here: http://www.hopelesscase.com/linuxnotes/encrypted_filesystems/dmsetup_losetup_and_mount
I did some necessary changes to the script there, like renaming the lopp/0 to loop0 . But on the crucible line, the dmsetup chicks out:
echo 0 20480 ox-crypt 12345678901234567890123456789012 12345678901234567890123456789012 0 /dev/loop0 0 | dmsetup create mdev device-mapper: reload ioctl failed: Invalid argument Command failed
and no file is written in /dev/mapper/
I have a new white light and did no firmware update, as I feared complications. Do I NEED to update?
But even here http://martin.hinner.info/mybook/encryption.php Martin does not say you need an update.