Once mounted using TrueCrypt, cannot unmount

Posted by zeiger on Ask Ubuntu See other posts from Ask Ubuntu or by zeiger
Published on 2011-06-29T17:40:42Z Indexed on 2011/06/30 0:30 UTC
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11.04

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truecrypt

I have an external HDD and use TrueCrypt for keeping encrypted file containers. After mounting, whenever I try to dismount a file container (using TrueCrypt 7.0a on Ubuntu 11.04), it just does not happen and I get the following message:

device-mapper: remove ioctl failed: Device or resource busy
Command failed

Further, if I close TrueCrypt and then try to start it again, it says that TrueCrypt is already running, but I cannot access it from the Unity sidebar (because it is not there).

Also, if I power down my external HDD, the TrueCrypt volume still shows as one of the mounted volumes, but I cannot do anything with it.

Any possible work around? I remember this NOT happening in earlier versions of Ubuntu so I am guessing there is something to do with 11.04.

Thanks

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