BIOS: HDD not detected.

[TheGrizzlySpartan]

Hello LinusTechTips Forum! First time posting here.

•  Brief backstory: I have 4 bootable drives. For the past 3 years i haven't changed anything on the motherboard.
• I have Windows 7 on one of my HDDs [1TB] and Windows 10 on my SSD[250G].
• Yesterday i moved my SSD from spot 3 to spot 0 (the 1TB[HDD]). I booted up and got the NTLDR is missing error.
• I switched the power button on the case. Opened it and made sure that everything was as is before i changed it.
• After booting i was greeted by the same message. I pressed f12 to boot from my SSD, but nothing happened. I pressed f12 again and booted from my original HDD.
• Everything booted fine. I was given the option to choose Windows 7 or 10. Only thing that might have differed was the load speed.

Today when i started up the PC, the same error occurred: NTLDR is missing. I had to press f12 again to select my HDD so it could boot it.

I checked the BIOS boot options. There was only 1 boot option: My 250GB HDD ( Old PC HDD). I have never booted from it before. I have attached a pic of the f12 menu.

Why isn't the BIOS detecting the 1TB HDD as a bootable drive? How can I make it to do so?
It would mean a lot to me if anyone can help me out. I have been stuck with this for some time and it's killing me.

 

[Crunchy Dragon]

The ST1000DM003 is your 1Tb HDD, maybe try hitting the Enter key on it and seeing if it'll boot?

 

Welcome to the forums, please enjoy your stay!

[Light-Yagami]

BIOS will try to boot from the top priority drive. It's the boot order thing. The first drive in line is what bios tries to boot from. If it can't you'll get the error message.

If you can't boot from drive that has windows 10 on it, enabling the compatibility mode function in bios might be the solution?

 

Edit: Also, welcome to the forums! We're glad to have you

[TheGrizzlySpartan]

@Crunchy Dragon @Light-Yagami Thank you for the warm welcome.

I took your advice. I looked up the BIOS settings i had set. There was

an option: Set optimal. By triggering the option the boot device was set
back to my 1TB main HDD (previously the option wasn't visible). Thank
you for the help. Everything is working fine.