After some messing about on my computer (short story:inf loop, loop writes to container in memory), I've built up large chunks of swap space on my computer. The problem isn't space that's been used up, rather the locking up of the system when switching to another application. Since the hard drive IO is flooded by calls, and that the swap space is invariably fragmented across the entire drive (iDefrag currently shows 2 1GB swapfiles: 984 and 3873 pieces). When I went back to working in Numbers (1 400kb document open), I got a beachball for about 5-6 minutes while the app was being read back into memory from the thousands of bits on my hard drive. Now, as my thread topic suggests: is there a way to dedicate a portion of the drive (preferably not a partition) of contiguous space ONLY for swap space usage? Googling turned up a few *nix related methods, but the link below has a stack of comments titled 'stupid idea'. Can anyone break down the method (and why they think it's a stupid idea) in the link below? http://www.macosxhints.com/article.php?story=20011226102423514 Thoughts? Suggestions? Or is it just not possible?