Not sure on your exact machine/OS but it is sometimes necessary or a good idea to tell the OS that the drive is a SSD. The main thing is that SSDs only like to be written to a certain number of times before they fail (it is millions) and that limit would be reached quite quickly if the OS assumed it was a normal drive and used it for caching and other very "chatty" operations. If you tell it is an SSD it modifies how it uses the drive a little, thus making the best use of it and lengthening the life of it.
Not sure on your exact machine/OS but it is sometimes necessary or a good idea to tell the OS that the drive is a SSD. The main thing is that SSDs only like to be written to a certain number of times before they fail (it is millions) and that limit would be reached quite quickly if the OS assumed it was a normal drive and used it for caching and other very "chatty" operations. If you tell it is an SSD it modifies how it uses the drive a little, thus making the best use of it and lengthening the life of it.