"I manage a network of roughly a hundred Windows boxes, all of them with hard drives of at least 40GB — many have 80GB drives and larger. Other than what's used by the OS, a few applications, and a smattering of small documents, this space is idle. What would be a productive use for these terabytes of wasted space? Does any software exist that would enable pooling this extra space into one or more large virtual networked drives? Something that could offer the fault-tolerance and ease-of-use of ZFS across a network of PCs would be great for small-to-medium organizations."