Hard disk cpu working mechanism

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The topic of today's lesson is related to the hard disk CPU working mechanism


Although this lesson is simple to read, it helps in detecting a specific defect that we learn about after listing what the processor does. When we turn on the hard power, the processor does the following:

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1- Loadthe full ROM onto the RAM.


2- Load the overlays on the RAM.


3- The microcode in the ROM is compared with the microcode in the overlays. In case of matching, the hard drive works normally, but if the microcode is different, the hard becomes undetective, meaning it is not recognized.


Note here the importance of matching the microcode in the ROM and the microcode in the loader, and here is the mechanism of the processor’s work


It helps in detecting whether the microcode in both of them matches or not and correcting the problem if it exists.