What type of drive uses master and slave connections?

The type of drive that uses master and slave connections is the IDE (Integrated Drive Electronics) drive, also known as PATA (Parallel ATA). In this configuration, two drives can be connected to a single IDE channel, with one designated as the "master" and the other as the "slave." This setup allows for efficient data transfer between the drives and the motherboard. However, this technology has largely been replaced by SATA (Serial ATA) drives, which do not use the master/slave configuration.