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Windows 7: UEFI Booting of GPT partition doesn't work after 2nd HDD was added

10 Nov 2011   #1

Windows 7 Professional 64bit
 
 
UEFI Booting of GPT partition doesn't work after 2nd HDD was added

Good day,

I have an Asus Z68 mainboard with UEFI-BIOS. Windows 7 Professional 64bit is installed in UEFI mode on a GPT partitioned drive (SSD). It worked flawlessly.

Now I added my second, old harddrive, that is still MBR formatted.
Windows won't start anymore, instead I am seeing "Windows is loading files", then a blinking cursor, and that's all.

I have two options in BIOS regarding boot priority:
1) I can boot from the SSD as primary priority
2) I can select an option called "Windows Boot loader", I think this refers to the UEFI boot code that Windows wrote to the UEFI.

If I select the first option, I get the "Windows is loading files screen" and then the "Windows has detected a startup error, do you want to repair the system startup" screen. If I select "Start Windows normally", I get a blinking cursor and then nothing. If I select "Repair startup", I see "Windows is loading files", and then again the "Startup repair screen". It is an endless loop.

If I select the second option, I get "Windows is loading files", then a blinking cursor, and nothing more.

Is there any way to get my Windows to boot again without disconnecting or re-partitioning the old harddrive?

Note that the old harddrive is NOT for booting, as it is just a datastore.

Philipp

My System SpecsSystem Spec
10 Nov 2011   #2

Windows Home Premium x64
 
 

Philip,

Have you checked that the BIOS is not trying to RAID your 2 devices, your should find that in Integrated Peripherals (or something similar) in the BIOS
My System SpecsSystem Spec
11 Nov 2011   #3

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Make sure the Hd Drive is showing in BIOS, also the boot order of the drives.
My System SpecsSystem Spec
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 UEFI Booting of GPT partition doesn't work after 2nd HDD was added





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