HARD DISK CONTROLLER

What does Hard Disk Controller (HDC) mean?

A hard disk controller(HDC) is an electronic component within 

the computer hard disk.

that enables the processer or cpu to access,read,write,delete and 

modify to and from the hardisk.

Essentially,HDC allow the computer or processer to control the hard disk.

Explains Hard Disk Controller (HDC)

  

A hard disk controller's primary function is to translate the instructions received from the computer into something that can be understood by the hard disk and vice versa. It consists of an expansion board and its related circuitry, which is usually attached directly to the backside of the hard disk. The instructions from a computer flow through the hard disk adapter, into the hard disk interface and then onto the HDC, which sends commands to the hard disk for performing that particular operation.

                                                                     HDC CARD

HDC can be inside the hard disk or it can be outside the hard disk which is place on Expansion slot.