TRIM status on external, non-Apple SSD

I have a mid-2009 13" mbp that is currently running Mavericks. My logic board is in less than ideal health, and was no longer recognizing my internal SSD (OCZ Agility 2, 60GB) so I'm running it externally. After the update to Mavericks, I had to re-enable TRIM support with Trim Enabler 3.1.2. How do I determine if TRIM is enabled and working, as there’s no TRIM Status field under “Storage.” (I should also note that the Trim Enabler app says the patch is active, but can’t determine TRIM status.)

All F keys on the external (ansi I think, standard MS windows keyboard) do nothing when hooked up the the MBP.
Other thoughts?
Bob

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