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Read-only truecrypt volume

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Problem

You mount an NTFS volume with the TrueCrypt GUI but it's read-only.

Solution

Mount it from the command line:

truecrypt --filesystem=ntfs-3g /dev/sda7 /mnt/truecrypt1

Reason: by default the NTFS volume is mounted with the ntfs driver which mounts the volume in read-only mode. We need to switch to the ntfs-3g driver.

Tip from http://hype-free.blogspot.com/2007/04/installing-and-using-truecrypt-on.html .

Troubleshooting

You may get the following error message: device-mapper: create ioctl failed: Device or resource busy. This error happens if you try at least once to run Truecrypt with mount point that doesn't exist. After this you will need to first remove the busy device.

sudo cryptsetup -v remove /dev/mapper/truecrypt1

You might need to install cryptsetup via apt-get.

Tip from http://ubuntuforums.org/archive/index.php/t-1108815.html .