The page in question: http://www.freebsd.org/doc/en/articles/solid-state/kernel.html
According to a post in the reference above, pseudo-device (used with "pseudo-device md") is no longer used. Furthermore, in the generic kernel configuration, "device md" already exists.
Ensure that the entry "device md" already exists in the generic kernel and, if so, make a note of that on the page? Probably further investigate what should be done for SSDs with 9.1-RELEASE.
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