Password on hard drive firmware? Doesn't exist to my knowledge.
If it's a password set by BIOS, unplug the CMOS batter, hold the power button for 10 seconds, then put the computer back together and the password should be gone. Sometimes you can jump 2 header pins on the motherboard to remove it also.
You can also use this site to find default BIOS passwords: https://bios-pw.org/
If the hard drive is encrypted (like bitlocker), you're screwed just wipe the drive.
If the hard drive is not encrypted, and it's a windows password, use the "utilman trick" to reset the password:
If it looks like this:
It's called syskey, the registry is encrypted. Restore a registry restoration by taking the backup from C:\Windows\System32\config\RegBack and pasting it into C:\Windows\System32\config. If the backup was taken before syskey was set, it will be removed.