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diff --git a/readme.rst b/readme.rst
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@@ -50,3 +50,5 @@ Here are the links to each task's readme:
18. Handling Delayed Work: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/18/readme>`__
19. Networking Filters: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/19/readme>`__
+20. FAT ioctl: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/20/readme>`__
diff --git a/tasks/20/readme b/tasks/20/readme
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+Task 20
+Networking filters turned out to be not all that complex in the end,
+great work with that.
+So, here's the final task.
+There might be other tasks that get created and sent out later on, but
+the original challenge had 20 tasks, so after finishing this one, you
+can consider yourself done!
+Let's try something a bit harder. Something that might cause some data
+loss on a filesystem, always a fun thing to play with, if for no other
+reason than to not be afraid of things like that in the future.
+This task requires you to work on the fat filesystem code:
+ - Add an ioctl to modify the volume label of a mounted fat filesystem.
+ Be sure to handle both 16 and 32 bit fat filesystems {hint!}
+ - Provide a userspace .c program to test this new ioctl.
+That's it! Seems so simple, right? I wonder why that option isn't in
+the kernel tree already...
+Anyway, provide a patch to the kernel, and the .c file used to test the
+new ioctl, as well as "proof" of this working. Make sure you don't run
+into 32/64bit kernel issues with the ioctl, if you do things correctly,
+you shouldn't have any problems.
+I recommend doing this work on either a loop-back fat filesystem on your
+"normal" filesystem, or on a USB stick. Either will work just as well,
+and make things easier to debug and test.
+Watch out for locking issues, as well as dirty filesystem state
+Best of luck!