How to delete firmware from a hard drive

Just got back my laptop from the repair man andI had my Asus hard drive switched for a hp drive and now there is no way of getting it back. I want to ask if it is possible to delete the contents of that drive along with the hp firmware so that I can install an Asus firmware on it?

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Reply to: How to delete firmware from a hard drive
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Clarification Request
I'm just an engineer.

So what you are asking doesn't make sense to me. Firmware is specific to the make, model and version of the HDDs. So my thought here is you are writing firmware but really are asking how to copy the contents of drives.

Copying files from drive to drive is something millions can do so I'm left with this. Try again and tell what you want to do.

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What stuff is on the new hdd that applied to the old hdd and not the laptop itself?

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Re: deleting

Any partition manager can delete all partitions on the hard drive.
And a program like DBAN can delete everything on all hard drives on your system, so be sure that you disconnect all drivers that you want to keep if you use that.

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