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+Quick'n'Dirty how to make a LUKS encrypted disk partition.
+I'm encrypting the first partition on the disk called hdc.
+Make luks device:
+<code>
+cryptsetup -y --cipher aes --key-size 128 luksFormat /dev/hdc1
+</code>
+If you choose to use sha256 instead, you will get something like this:
+<code>
+Failed to setup dm-crypt key mapping.
+Check kernel for support for the aes-cbc-essiv:sha256 cipher spec and verify that /dev/hdc1 contains at least 133 sectors.
+</code>
+This is because you're using the geode_aes kernel module which only support sha128. You can get it to "eat" a sha256 but you will have to unload geode_aes (sudo rmmod geode_aes) and load the generic aes module (sudo modprobe aes).
+There is however a speed penalty when doing it like this. I don't know why though, maybe there is some hardware acceleration involved when using the geode_aes module.
+If you play with Truecrypt you will also see some errors related to this problem. You can probably get it working using a sha128 but I haven't spent time figuring it out.
+Open the LUKS:
+<code>
+cryptsetup luksOpen /dev/hdc1 encdisk
+</code>
+Make filesystem:
+<code>
+mkfs.ext3 -j -m 1 -O dir_index,filetype,sparse_super /dev/mapper/encdisk
+</code>
+Mount device for use:
+<code>
+mount /dev/mapper/encdisk /share/encrypteddisk01
+</code>
+Unmount device:
+<code>
+umount /share/encrypteddisk01
+cryptsetup luksClose encdisk
+</code>