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What are main pros and cons of ZFS and WinFS filesystems ?
As per my comment above, it is hard to compare something that exists with which doesn't. As of 2006, WinFS was cancelled, and the current development is unknown. ZFS, on the other hand, is well and kicking.
Unfortunately ZFS is bound by the laws of reality. WinFS is only bound by the laws of marketing.
In this case WinFS is clearly the winner, depending on how gullible you are.
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