I can't find the specific link, but here's the marketing pitch: <a href="http://www.sun.com/x64/intel/zfs_solution_brief.pdf" rel="nofollow">http://www.sun.com/x64/intel/zfs_solution_brief.pdf</a><p>Also, Googling for "sun hybrid storage" without the quotes will give you more information.<p>Edit: Here's a good explanation of how ZFS incorporates flash in its L2ARC, with benchmarks: <a href="http://blogs.sun.com/brendan/entry/test" rel="nofollow">http://blogs.sun.com/brendan/entry/test</a><p>Edit2: I found a higher-level explanation of flash in ZFS. What I didn't realize is that the software is all free to use commercially, though you'd have to be on open solaris: <a href="http://blogs.sun.com/jonathan/entry/not_a_flash_in_the" rel="nofollow">http://blogs.sun.com/jonathan/entry/not_a_flash_in_the</a>