4TB GPT Not Booting - UEFI - WINDOWS 7 64 Bit

Mishal2015 · 15 Feb 2016

Problem is WINDOWS 7 does not boot from the 4TB disk alone. There is a 2 line error message "ReBoot and Select Proper Boot Device Or Insert Boot Media in Selected Boot device and press a key". The system boots only when both the hard disks are connected.

4TB GPT Not Booting - UEFI - WINDOWS 7 64 Bit-screenhunter_179-feb.-15-17.27.jpg

4TB GPT Not Booting - UEFI - WINDOWS 7 64 Bit-screenhunter_180-feb.-15-17.28.jpg

4TB GPT Not Booting - UEFI - WINDOWS 7 64 Bit-screenhunter_181-feb.-15-18.01.jpg

Did any update of BIOS to UEFI from ASUS. Copied the the partition from 1TB to 4TB hard drive via AOMEI Partition Assistant. There is also a hidden folder \WINDOWS\Boot on both the physical disks. Moreover,EasyBCD shows the Bootloader Path to 4TB disk c:\Windows\system32\winload.exe.

Any guidance on how to change the system partition from E: to C:

AddRAM · 16 Feb 2016

That`s because Disk 0 is marked Active and Disk 1 is not, you have to have an Active partition on a drive for windows to boot.

Disk 0 should have been unplugged when you installed on the the 4 TB drive.

Whether a GPT needs an Active partition to boot, I`m not sure, I don`t use GPT disks.

Hopefully a member will come along with a quick fix.

Troubleshooting Windows 7 Failure to Boot

Mishal2015 · 16 Feb 2016

The DOS prompt is not allowing GPT disk to be marked "ACTIVE" via DISKPART

4TB GPT Not Booting - UEFI - WINDOWS 7 64 Bit-screenhunter_182-feb.-16-13.56.jpg

AddRAM · 16 Feb 2016

Then that clarifies the theory, a GPT drive can not be marked Active, it uses a EFI system partition instead.

Just disconnect Disk 0 and reinstall windows to the C partition on Disk 1

Make sure you connect Disk 1 to sata port #1 on the motherboard first.

I would have thought someone would have come by with a fix by now.

Read through these, maybe there`s an answer in there.

https://www.google.com/webhp?sourcei...+will+not+boot

https://www.google.com/webhp?sourcei...ked+Active+%3F