How did you end up configuring that Mike? Did you put Windows on the internal un-fused SSD, or on the external SSD with your OS X on the Fusion drive, or separate?
Because Windows does not like installing on a usb drive (though there are work arounds), i opted to defuse my Fusion drive. So I have my internal SSD completely setup for windows, I have 1TB of the spinning drive for my images, dropbox and OneDrive.
On the mac side, I have a 500GB external SSD that holds everything (sans images). I have the other terebyte of the spinning drive dedicated to OS X.
I'm liking this arrangement, I tried defusing my drive, but found with OS X on the small 128GB SSD, I had to symlink much of my home folder contents. Now, I have no symlinks and most of my data is on a ssd. My images which take up most of my space is on the spinning drive.
I'm thinking of getting MacDrive (or Paragon's HFS) so my windows environment can access the HFS+ partition
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I keep hearing people on MR saying how hard it is to upgrade a HDD to a SSD in the new iMac (Slim Unibody iMac).
yes, I'm aquatinted with the videos, but the fact remains there is risk, Unfortunately the OP is a prime example of what could go wrong. I'm not getting down on him, because it sucks. The fact remains Apple designed the computer in such a way to ensure that upgrading the internals is not considered a user replaceable component and you risk voiding the warranty.
I don't think we really need to rehash this argument in this thread, because we've beaten this horse to death. You have your opinion and respect that, and I have mine.