Boingoman,
I posted this in another thread, but it was about the same question you've got about hard drives and partitioning, etc. . . . .
Anyway, here's what I wrote:
I'm in almost the same boat. . . 1 computer for 2 uses. Here's what I did. Depending on the size of your hard drive, make 3 partitions. Two 12 (or so) gig partitions and a third parition with everything you have left over. Install Windows on both of your 12 gig partitions, and use your third partition for all your storage (i.e., mp3's, recording files, office documents, etc.)
In your first windows partition, install everything you use for general computer usage. . .office, games, etc.
In your 2nd windows partition, install only your DAW programs. Treat it as a separate computer used only for recording.
Here's a link explaining exactly how to do this:
http://www.homerecordingconnection....ew_story&id=151
On your DAW Windows installation, you can tweak it to get the most performance out of your computer
Here's a link explaining exacly how to do this:
http://www.homerecordingconnection....ew_story&id=253
Bingo, you've got 2 computers in one. I like doing it this way.
It's not going to be quite as efficient as another physical hard drive sitting in your computer (for the reasons stated above by TimOBrien), but it's better than doing it all on one unpartitioned hard drive - simply because you can set up your DAW windows installation to not do normal windows maint. stuff while you're recording.