problem to upgrade ssd firmware

I think I read that the CD with the updater software needs to be interrnal.  I removed my optical drive to external in favor of adding an additional hard drive (nice kit - better than the OWC one [no disrespect meant] - but the drive is much more secure in the holder).  Anyway, somewhere it said the firmware had to be updated using an internal optical drive.  Is this true?  And how critical is this firmware update?  Have been using this 256 GB SSD for many months now with no problems.  Don’t want to open a can of worms, or worse yet be stupid and not apply an updated that is needed to make the drive stable/etc.

Anyone out there with suggestions?  Or is my only option to reinstall the optical drive to do this?  I read somewhere also that to do this update the person suggested moving the SSD to another computer.

I’m running an early 2011 MacBook Pro, 2.3 GHz, 16 GB RAM, OS X 10.9.3 - if that is necessary to help with an answer/suggestion.

Thanks in advance…

Tom