You have a server named Server1 that runs Windows Server 2012 R2.
You start Server1 by using Windows RE.
You need to repair the Boot Configuration Data (BCD) store on Server1.
Which tool should you use?
How To Rebuild the BCD in Windows
1. Start Advanced Startup Options if you’re using Windows 8.
2. Open Command Prompt from Advanced Startup Options or System Recovery Options menu.
3. At the prompt, type the bootrec command as shown below and then press Enter:
The bootrec command will search for Windows installations not included in the Boot Configuration Data and then ask you if you’d like to add one or more to it.
B. Bootsect.exe updates the master boot code for hard disk partitions to switch between BOOTMGR and NTLDR. You can use this tool to restore the boot sector
on your computer. This tool replaces FixFAT and FixNTFS.
D. The bootcfg command is a Microsoft Windows Server 2003 utility that modifies the Boot.ini file.
References: How to Rebuild the BCD in Windows