: If Diskpart shows your drive as "RAW" instead of "NTFS," the file system is corrupt. In this case, boot repair commands will fail. You may need to run chkdsk D: /f /r first to repair the file system before repairing the boot files.
To repair the boot of a Windows Server 2012 R2 system, you primarily use the tool through the Windows Recovery Environment (WinRE) . This process typically involves booting from installation media and running a series of commands to rebuild the Boot Configuration Data (BCD) or fix the Master Boot Record (MBR). Step 1: Access the Recovery Command Prompt
diskpart list disk select disk 0 (adjust if system disk is not disk 0) list partition exit
When the Command Prompt opens, the drive letters may shift. The system drive (where Windows is installed) might not be C: .
The server didn't budge. "UEFI," Elias muttered, realizing the old tricks weren't enough. He fired up diskpart to find the hidden EFI partition—the tiny FAT32 slice where the boot instructions actually lived.