Promoted as "The only hard disk copy and diagnostic tool you'll ever need!", the Disk Jockey is an external piece of hardware that has 8 major functions to manage UltraDMA (UDMA) hard disk drives.

That last point is pertinent; you can’t create this disk structure with a standard IBM PC floppy disk controller; you need specialized hardware that can write different-sized sectors and ...

The hard disk controller is equipped three ARM cores, for the serial port UART and at least two SPI because there are interesting with Mr. Sprite_tm as controller boards.