DmitryKo
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Tutorial: In-place upgrade MBR boot disk to EFI boot disk
I've just finished an in-place upgrade of Windows 7 to 8.1u1 (with a intermediate step of upgrading W7 to W8).
The system was installed was on a SSD with MBR partitions and I wanted to convert to GPT disk and initialize secure EFI boot, but Windows setup and DiskPart only allow this operation on a clean unformatted disk, and a few threads in the forum advise that this is the only option:
http://www.eightforums.com/installation-setup/13400-cannot-boot-uefi-install.html
http://www.eightforums.com/installation-setup/27963-efi-uefi-partition-deleted.html
http://www.eightforums.com/installa...ion-missing-files-repair-disk-won-t-boot.html
http://www.eightforums.com/performa...have-luck-imaging-8-uefi-gpt-secure-boot.html
etc.
Fortunately I have found Microsoft KB articles that detail the process of manually making/restoring an EFI boot partition.
There is a 3rd party disk partitioning utility that allows you to convert MBR disks to GPT disk and resize partitions to make room for EFI boot, WinRE and MSR partitions.
So I thought this would be useful if someone would review the process and maybe the admin will eventually make a full step-by-step tutorial out of this thread.
This guide can also be used to manually restore EFI system boot partition in case of failure.
I've just finished an in-place upgrade of Windows 7 to 8.1u1 (with a intermediate step of upgrading W7 to W8).
The system was installed was on a SSD with MBR partitions and I wanted to convert to GPT disk and initialize secure EFI boot, but Windows setup and DiskPart only allow this operation on a clean unformatted disk, and a few threads in the forum advise that this is the only option:
http://www.eightforums.com/installation-setup/13400-cannot-boot-uefi-install.html
http://www.eightforums.com/installation-setup/27963-efi-uefi-partition-deleted.html
http://www.eightforums.com/installa...ion-missing-files-repair-disk-won-t-boot.html
http://www.eightforums.com/performa...have-luck-imaging-8-uefi-gpt-secure-boot.html
etc.
Fortunately I have found Microsoft KB articles that detail the process of manually making/restoring an EFI boot partition.
There is a 3rd party disk partitioning utility that allows you to convert MBR disks to GPT disk and resize partitions to make room for EFI boot, WinRE and MSR partitions.
So I thought this would be useful if someone would review the process and maybe the admin will eventually make a full step-by-step tutorial out of this thread.
This guide can also be used to manually restore EFI system boot partition in case of failure.
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System One
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- OS
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