Full Disk Encryption with LUKS: auto mount second volume

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http://askubuntu.com – TrueCrypt on Windows can auto mount volumes that use the same passphrase as the boot volume. You enter the passphrase only once. Is there a way to do this with LUKS? Background: I'm currently migrating from Windows to Ubuntu. I set up Ubuntu 11.10 with LUKS full disk encryption. I use a second hard drive that is still a TrueCrypt NTFS volume. I want to change that. (HowTos)