How do I identify the chip with the Firmware on the PCB?

[Vitalius]

I just purchased a hard drive that was made approximately a month after the one I aim to repair that is fully functioning. They are the same everything besides that one detail. Even the layout of the PCB's themselves.

Now, I know I need to transfer the Firmware chip from the old HDD to the new HDD's PCB. However, I have no idea which one that is. Any help would be appreciated.

Here are pictures of the HDD PCB in case you can identify it simply by looking:

[harddrivespecialist]

Picture is not to clear, but it seems like one on a bottom right of Processor chip (LSI) and it has 8 legs

[Vitalius]

Thank you very much. May I ask how you figured it was that one?

[Keatah]

Try googling the chip numbers and reading the data sheets.
It is typical to have serial-roms on controller boards. And this certainly a serial-rom.

[harddrivespecialist]

Thank you very much. May I ask how you figured it was that one?

Experience, probably.

[shahij]

It seems to me it's CLA series HDD... it doesn't have NVRAM by the way...