I know that the purpose of overprovisioning is to give the SSD free space to move blocks to when writes occur, and to give garbage collection some space to play with. But how does the SSD know that an unpartitioned area is unpartitioned? And what if I suddenly decide to partition it? Will it damage any data being held in that unpartitioned space?
Partly what prompted me to ask this is the warning in the Samsung Magician software that "Using a RAW partition may damage your data."