No I simply want to "sign" all the SSD cells as "free". To optimize his performance.It depends on what the "original" state of the SSD was.
It may have been formatted originally for a PC, so if you want it to work on your Mac you may NOT want it in its original state.
And you could secure erase it, but why? Are you giving it to someone? It takes a lot of time and is pointless if all you want to do is erase all your stuff and put it all back on again.
I think there may some misunderstanding. It sounds like you want to TRIM all unused blocks on the drive to speed up write performance?No I simply want to "sign" all the SSD cells as "free". To optimize his performance.