On Jan 2, 2010, at 16:49, Erik Trimble wrote:

My argument is that the OS has a far better view of the whole data picture, and access to much higher performing caches (i.e. RAM/ registers) than the SSD, so not only can the OS make far better decisions about the data and how (and how much of) it should be stored, but it's almost certainly to be able to do so far faster than any little SSD controller can do.

Though one advantage of doing it with-in the disk is that you're not using up bus bandwidth. Probably not that big of a deal, but worth mentioning for completeness / fairness.
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