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Windows 7: System migration from MBR to UEFI

14 Oct 2019   #1
goopy

Windows 7 Ultimate x86
 
 
System migration from MBR to UEFI

Greetings.
One of my machines has been acting up lately, and is no longer able to reliably detect the MBR disk on which a W7x64 ultimate system is installed. Is there a way to migrate the MBR system to a UEFI setup, either in situ or to a new disk?
Many thanks and best regards,


My System SpecsSystem Spec
.
14 Oct 2019   #2
samuria

win 8 32 bit
 
 

You say it's not detected is that BIOS or windows? Have you tried another port and cable and run check disk? We need to know the state of the disk if it's got lots of bad blocks then a new disk and a clean install is the only sensible option
My System SpecsSystem Spec
14 Oct 2019   #3
Paul Black

Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
 
 

Hi goopy,

Quote   Quote: Originally Posted by samuria View Post
. . . and run check disk? We need to know the state of the disk if it's got lots of bad blocks then a new disk and a clean install is the only sensible option
As samuria has suggested please do the following . . .

Under the heading chkdsk [Check Disk] - ALL Parameters . . ., please run CHKDSK.bat, Options [2] and [5] from here => BATCH PROGRAMS [Standalone] and then upload the results using the tutorial at the bottom of the above link [Upload to SevenForums . . .] and someone will look at it for you.

INFORMATION: I have written quite a few batch scripts in order to streamline processes, avoid possible typing errors, and save time hunting around for specific Windows and tabs etc. It is just quicker and easier for users to run the batch script[s] and then upload the results for us to look at.

I hope this helps!
My System SpecsSystem Spec
.

14 Oct 2019   #4
Megahertz07

Windows 7 HP 64
 
 

A boot able UEFI - GPT disk can only be used on a computer with UEFI BIOS.

If the disk can't be seen by BIOS, it has probably died.
Do you hear it spinning? Does it make any click noise?
My System SpecsSystem Spec
14 Oct 2019   #5
goopy

Windows 7 Ultimate x86
 
 

Quote   Quote: Originally Posted by Megahertz07 View Post
A boot able UEFI - GPT disk can only be used on a computer with UEFI BIOS.
...
Uhmm...that sounds most sensible, and rather obvious, wont you agree?
Perhaps something more helpful, like, er....How to migrate OS from MBR to UEFI?
Many thanks and best regards,
[btw, I've read many of posts on installation. They've been most useful. Thank you,]
My System SpecsSystem Spec
15 Oct 2019   #6
Vineet Garg

Windows 7 Ultimate x32 With Sp1 + Vista Ultimate x32 with Sp1 & Sp2 !!
 
 

Hi All,
Greets,

@goopy :

1. The Pro versions of good Imaging & Partitioning tools are available for free trial OR AOMEI Backupper Professional 5.3 - Free License

2. Also you can use AOMEI Backupper Free/Standard to do the thing as here :
Restoring MBR System Image to GPT/UEFI

3. If you ever feel that there is a problem with the disk, first of all clone/Image the disk & then only go for chkdsk, etc. Because in the process, you can lose your data and/or system. The modern age softwares apply methods that give you a good chance to get it all back & working on a new disk.
EDIT : Even I have seen times when people Imaged/cloned the faulty disk. Then they applied repairs to the faulty disk & the faulty sectors were well recognized by the system,etc. Then they restored the clone/image back on the same disk, writing only on the good sectors & sections of the same disk with full functionality. And certainly they replaced that disk soon

Let me know.

Thanks & Regards. ...
My System SpecsSystem Spec
15 Oct 2019   #7
Megahertz07

Windows 7 HP 64
 
 

To convert a MBR data disk to a GPT disk is quite simple. Many partitions software like Aomei or Mini tool can do it.
Convert MBR Disk to GPT Disk in Windows 10 | Tutorials

But to convert a Legacy-MBR boot able disk to a UEFI-GPT isn't that simple.
A UEFI-GPT has a Fat32 partition that has the boot loader(s) that isn't on the Legacy-MBR disk. This partition has to be created by the OS.
Win 10 has a function to convert Legacy-MBR boot able disk to a UEFI-GPT and it creates the Fat32 boot loader(s) partition.
Convert Windows 10 from Legacy BIOS to UEFI without Data Loss | Tutorials
MBR2GPT | Microsoft Docs

Win 7 does not have this app.
My System SpecsSystem Spec
.
4 Weeks Ago   #8
goopy

Windows 7 Ultimate x86
 
 

Quote   Quote: Originally Posted by Vineet Garg View Post
Hi All,
Greets,

@goopy :

I never did it myself but there is no risk as you can always choose to clone/Image the disk & then play with the clone/ image & not the real disk & system!

1. The Pro versions of good Imaging & Partitioning tools are available for free trial. Those can do the thing for you!

2. Also you can use AOMEI Backupper Free/Standard a reputed free software to do the thing as here :
Restoring MBR System Image to GPT/UEFI

3. If you ever feel that there is a problem with the disk, first of all clone/Image the disk & then only go for chkdsk, etc. Because in the process, you can lose your data and/or system. The modern age softwares apply methods that give you a good chance to get it all back & working on a new disk.
EDIT : Even I have seen times when people Imaged/cloned the faulty disk. Then they applied repairs to the faulty disk & the faulty sectors were well recognized by the system,etc. Then they restored the clone/image back on the same disk, writing only on the good sectors & sections of the same disk with full functionality.
And certainly they replaced the disks soon

Hope it helps!

Thanks & Regards. ...
Greetings Vineet Garg, thanks for the kind reply.

1. Can't find on the linked page how to create the FAT32 EFI partition on the target disc. Does AOMEI/Macrium provide such functionality?
2. Any tools/commands to generate the EFI partition?
3. Or is it possible to clone an existing EFI partition and use it together with MBR system partition?

Many thanks and best regards,
My System SpecsSystem Spec
4 Weeks Ago   #9
goopy

Windows 7 Ultimate x86
 
 

Quote   Quote: Originally Posted by Megahertz07 View Post
To convert a MBR data disk to a GPT disk is quite simple. Many partitions software like Aomei or Mini tool can do it.
Convert MBR Disk to GPT Disk in Windows 10 | Tutorials

But to convert a Legacy-MBR boot able disk to a UEFI-GPT isn't that simple.
A UEFI-GPT has a Fat32 partition that has the boot loader(s) that isn't on the Legacy-MBR disk. This partition has to be created by the OS.
Win 10 has a function to convert Legacy-MBR boot able disk to a UEFI-GPT and it creates the Fat32 boot loader(s) partition.
Convert Windows 10 from Legacy BIOS to UEFI without Data Loss | Tutorials
MBR2GPT | Microsoft Docs

Win 7 does not have this app.
Greetings Megahertz07, thanks for the kind reply.

1.So it's just a simple matter of running the following elevated command in W10, where disk 1 is the MBR disk to be converted?
Code:
mbr2gpt /convert /allowfullOS /disk:1
2. It says on the linked page that Offline conversion of system disks with earlier versions of Windows installed, such as Windows 7 are not officially supported. What sort of problems can one encounter?

Many thanks and best regards,
My System SpecsSystem Spec
4 Weeks Ago   #10
Megahertz07

Windows 7 HP 64
 
 

I have never used mbr2gpt so I can't say how to use.
Make a disk image and save to an external disk before you try anything.
Download and make a WinPE rescue USB disk. Run the mbr2gpt from it.
Windows 10 Recovery Tools - Bootable Rescue Disk Solved - Windows 10 Forums
Detach (power or SATA cable) of all other disks
Make sure you select the proper disk:
Diskpart
list disk (take note of your win 7 disk)
exit
My System SpecsSystem Spec
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 System migration from MBR to UEFI




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