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Windows 7: UEFI and MBR storage disc: Windows is no longer bootable?

24 Dec 2013   #1
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Technical Preview 64-bit
 
 
UEFI and MBR storage disc: Windows is no longer bootable?

I installed windows 7 as UEFI, removing the old MBR storage disc. After completing the installation whenever I try to add the storage disc, windows becomes unbootable. Remove the storage disc, everything is as normal as earlier.

Is there a way to solve this issue with keeping everything intact?

Thanks a lot in advance.

** Microsoft has some hotfixes, but those need to be added to installation media


My System SpecsSystem Spec
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24 Dec 2013   #2
theog

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Is Windows Boot Manager, first boot device in UEFI/BIOS firmware

Are all storage drives marked INACTIVE
My System SpecsSystem Spec
24 Dec 2013   #3
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Technical Preview 64-bit
 
 

The windows boot manager is in UEFI.

The other discs... if I attach them, they are not auto detected. If I restart, I cannot boot to anything, so I am not sure if they're marked as inactive or not. I will try PW boot cd and will let you know.

Thank you Ray

EDIT: Cannot boot into PW, too. It says .... "This bootable CD does not support windows server"
My good old PW bootable CD
My System SpecsSystem Spec
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24 Dec 2013   #4
Brink
Microsoft MVP

64-bit Windows 10
 
 

Hey Archie,

It's not looking good for that storage drive. Do you have the same issue if you connect the storage drive to another computer.
My System SpecsSystem Spec
25 Dec 2013   #5
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Technical Preview 64-bit
 
 

Quote   Quote: Originally Posted by Brink View Post
Hey Archie,

It's not looking good for that storage drive. Do you have the same issue if you connect the storage drive to another computer.
Hi Shawn.
Installed windows in another HDD , using the legacy settings for BIOS, all the HDDs are accepted and works good.

If any of them are connected to the UEFI installation, windows does not boot

So probably Storage drives are not faulty? It seems that the issue is somehow similar to "Boot failed" error when you start a UEFI-enabled computer from a 64-bit version of Windows 7 or Windows Server 2008 R2 installation DVD (Package 1) and "Boot failed" error message when you start a UEFI-enabled computer from the installation DVD of a 64-bit version of Windows 7 or Windows Server 2008 R2 (Package 2) .
My System SpecsSystem Spec
25 Dec 2013   #6
gregrocker
Microsoft MVP

 

Do you have BIOS set to Compatibility Support Mode (CSM enabled)?

You'd need to tell the BIOS that you want it to recognize both UEFI and MBR disks. Most BIOS have CSM or Legacy Mode to achieve this.

Some BIOS require a firmware upgrade to get fully compatible or are not capable.

Which MS hotfixes do you think might apply?
My System SpecsSystem Spec
25 Dec 2013   #7
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Technical Preview 64-bit
 
 

Thank you Greg

The board runs on the latest available firmware, version F2.

In The UEFI settings, for storage, there are various options. UEFI only, Legacy only, Legacy first, UEFI first. All results the same.

For boot drive, there are two options available (other than enter setup etc), UEFI and SATA.

If I stick to UEFI, it happens all the things I described till now.

If I go for the SATA options, it results "no boot device specified" and needs to ctl+alt+del and enter teh setup to change the option to UEFI.

The two hotfixes I am talking are linked in my earlier post.

Thanks a huge lot to you all.
My System SpecsSystem Spec
25 Dec 2013   #8
gregrocker
Microsoft MVP

 

Archie, I've not seen a "UEFI first" setting before for Legacy BIOS or CSM settings. I saw that you affirmed to Ray that UEFI Boot Manager was set first in BIOS Boot Priority. Is this the "UEFI first" you're referring to or is that another boot order priority setting, which would make it more likely "UEFI first" is the Legacy/CSM setting?

Is it possible to see camera snaps of all related settings? Someone may recognize these hybrid settings.

It does seem that if those are the only choices then "UEFI First" would be what you want since you installed in UEFI mode. But that still doesn't expressly give Compatibility for the MBR storage drive although it somewhat implies it.

You could also consider reformatting your storage drive to GPT to see how it performs then, even trying "UEFI only" if necessary.

I would also inquire of the mobo maker telling them we're waiting to hear.
My System SpecsSystem Spec
25 Dec 2013   #9
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Technical Preview 64-bit
 
 

Sorry for it, Greg. When I set the legacy settings, there is no "UEFI first" option. And with legacy everything works as smooth as always. All the MBR discs are detected with it.

But if I go for the UEFI settings, then I get the options including "UEFI First", "Legacy first" etc. In that situation, Windows boots when the GPT disc is connected only. A single MBR disc makes it refuse to boot.

I wanted a way to make the MBR discs work, without reformatting them to GPT, if possible
My System SpecsSystem Spec
25 Dec 2013   #10
gregrocker
Microsoft MVP

 

Look for CSM settings which is how GPT and MBR disks are normally co-mingled. There must be a setting.
My System SpecsSystem Spec
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 UEFI and MBR storage disc: Windows is no longer bootable?




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