The Disk Insert is a sexual practice in which the female flattens the mans penis into a disk-like shape. After this he insterts the disk into her vagina.
Hellen: Hey harry can we do something new?
Harry: Like what?
Hellen: The Disk Inserter..
Harry: Oh boy
A scratch disk is a temporary storage space used for editing and processing large files in software applications, like images or videos, to prevent overloading the main storage.