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2 definitions found
 for disk controller
From WordNet (r) 3.0 (2006) :

  disk controller
      n 1: (computer science) a circuit or chip that translates
           commands into a form that can control a hard disk drive

From The Free On-line Dictionary of Computing (30 December 2018) :

  disk controller
      (Or "hard disk controller", HDC) The
     circuit which allows the CPU to communicate with a hard
     disk, floppy disk or other kind of disk drive.
     The most common disk controllers in use are IDE and SCSI
     controllers.  Most home personal computers use IDE
     controllers.  High end PCs, workstations and network file
     servers mostly have SCSI adaptors.

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