Check if TRIM support is enabled?

I was just doing an install of FreeBSD 9.0 x64 today on a SSD. Normally I just do a guided partition on the whole disk. I was playing with the manual settings and found an option to enable TRIM, which I thought interesting since I've never enabled it before and didn't think there was an option in sysinstall. Anyway...is there a way to check if it's enabled and working fine? Additionally, are there pros and cons of having this enabled on FreeBSD?
 
Thanks wblock, so am I correct to assume since I had to set TRIM manually FreeBSD doesn't detect the SSD at install and automatically enable that setting?
 
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