A Disk Drive connected to a Computer or Turtle can be used to read or write on Floppy Disks or play music disks, using the 'dj' command. It is part of the ComputerCraft mod, and can only be used with ComputerCraft Computers. Unlike Turtles and Wireless Modems, it does not need to be wrapped as a peripheral to function properly.
When a Disk is registered, a Green light will appear on the small dash in the bottom right corner of the block.
On a turtle, it must be connected to the right side, or it will refuse to be found by the turtle.
Disk Drives need to have a Floppy Disk in them to be found in the file system of the Console. The drives with a Floppy Disk in them will be listed in the root directory by typing 'dir' into the Console. You can use normal file operations like 'copy' 'move' 'delete' and 'edit' like you would on the Console normally. Programs can be run directly off of the drive and then the Floppy Disk may be removed without anything happening to the running program.
Disk Drives are useful for running a few key programs in many different places, while carrying the Floppy Disk with you. This makes Mining Turtle trips much easier, as well as "movie theaters" much more manageable.
Disk Drives can be used as an expensive Note Block, though unlike the Note Block, several Disk Drives can be controlled with a Computer.