Can't boot windows after creating new MS-DOS (FAT) partition

I created a new MS-DOS (FAT) partition on Yosemite, and now I am unable to access my windows bootcamp partition.
- I can attempt to boot into windows from Yosemite however after a long while, I am prompted with "no bootable device".
- The option to boot windows from the startup manager is no longer visible.

It still shows the bootcamp partition with windows.
EDIT: Creating the new FAT partition did seem to create another partition which is visible when looking at the partition layout; the other partition is 1.04gb; format "Free Space". Apparently that's from bootcamp - hadn't noticed before.
I took some screens to show what I mean ("WINDOWS EXT" is the new partition I created):
- https://dl.dropboxusercontent.com/u/23413810/Apple/new%20fat.png
- https://dl.dropboxusercontent.com/u/23413810/Apple/new%20fat%20details.png
- https://dl.dropboxusercontent.com/u/23413810/Apple/created%20alongside%20fat.png
- https://dl.dropboxusercontent.com/u/23413810/Apple/windows%20bootcamp.png
- https://dl.dropboxusercontent.com/u/23413810/Apple/windows%20bootcamp%20details. png

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    1- D and C are physically separated disks OR there are part of the same physical disk but logically separated ?
    2- Where are located your system datafiles, controlfile, logfile, indexes?
    3- Are you using ASM?
    It depends a lot of your storage and database design.
    I suggest you test and compare the performance using AWR reports and view Oracle statistics via the Windows Performance Monitor (perfmon)..

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