PC doesn't detect HDD

[Lord_Niko]

So, i have PC with 3 HDD (Two of 1TB and one of 500GB). I have Windows 10 installed in the first 1TB drive and misc files in the 500GB drive.

The second drive of 1TB used to have installed Windows 8.1. The thing is, when i boot from the first HDD with W10, i can't see the second 1TB drive, and when i boot from the W8.1 drive, i can see the others drives normally. So i format the second 1TB drive from the Install DVD (i format all the drive and then delete the entire partition, later create a new partition again)

But still can't see the drive from windows 10 instalation.

The drive shows up in the BIOS as "UEFI Boot Source" (Which have priority to boot for some reason) and the Windows10 Drive appears as "Legacy Boot Source".

 

I have an HP Motherboard compatible with UEFI. My question is: Why the second 1TB (the WIndows 8.1 one) even having delete the entire partition and format, still apear as UEFI and the another drive (the W10 one) doesn't recognize the UEFI one.

 

[Electronics Wizardy]

do all the drives show up in disk management or devicemanager?

[agent_x007]

UEFI booting, usually means GPT drive (or hidden partition with EFI boot sector/partition on said drive).

[Lord_Niko]

24 minutes ago, Electronics Wizardy said:

do all the drives show up in disk management or devicemanager?

I already fix it, the file system was in GPT, chnaged to MBR and works well.

10 minutes ago, agent_x007 said:

UEFI booting, usually means GPT drive (or hidden partition with EFI boot sector/partition on said drive).

You're right! it was in GPT, changed to MBR and works fine!