MBRをGPTに変換する

手順

実際にやる

CドライブがMBRであることを確認する

code:powershell

PS C:\WINDOWS\system32> mbr2gpt /validate /disk:0 /allowfullos

MBR2GPT: Attempting to validate disk 0

MBR2GPT: Retrieving layout of disk

MBR2GPT: Validating layout, disk sector size is: 512 bytes

MBR2GPT: Validation completed successfully

PS C:\WINDOWS\system32> mbr2gpt /convert /disk:0 /allowfullos

MBR2GPT will now attempt to convert disk 0.

If conversion is successful the disk can only be booted in GPT mode.

These changes cannot be undone!

MBR2GPT: Attempting to convert disk 0

MBR2GPT: Retrieving layout of disk

MBR2GPT: Validating layout, disk sector size is: 512 bytes

MBR2GPT: Trying to shrink the OS partition

MBR2GPT: Creating the EFI system partition

MBR2GPT: Installing the new boot files

MBR2GPT: Performing the layout conversion

MBR2GPT: Migrating default boot entry

MBR2GPT: Adding recovery boot entry

MBR2GPT: Fixing drive letter mapping

MBR2GPT: Conversion completed successfully

Call WinReReapir to repair WinRE

MBR2GPT: Failed to update ReAgent.xml, please try to manually disable and enable WinRE.

MBR2GPT: Before the new system can boot properly you need to switch the firmware to boot to UEFI mode!

https://gyazo.com/a0726ef45663c07e49394280261a1fac

ReAgent.xml

読み飛ばしていたので気づかなかった

、reagentcコマンドでWinREをON/OFFする。