Windows 10: Creating an EFI partition

Hi,

On Win 10 machine I have a 1TB SSD which I used to boot Windows and it has an EFI partition. I purchased a 2TB installed Windows on it and migrated data as a primary drive. I realised that it does not have an EFI partition (but has Boot, Page, File, Crash Dump on it). When I remove the original drive (with EFI) it does not boot until I put it back in (here I get the Windows to select which partition to boot).

Is there a way I can create an EFI so I can boot off the 2TB without reformatting the drive?

Thanks

submitted by /u/pred_02
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:)

 

Move EFI partition

its to enable win 10 to update to its anniversary edition.. it cant do this due to lack of C drive space i have had a quick try with the trial version of easus.. it didnt seem to be able to do what i want..

i am assuming i cant just delete the efi partition but maybe i could.. as yet i havnt even figured out how to get into the bios of the thing.. maybe that should be my next step.. *Smile

diskpart could probably do it but figuring out how (it aint that user friendly) might be difficult without step by step instructions..

trog

 

UNMOUNTABLE_BOOT_VOLUME after creating new EFI System Partition

I would probably have booted to a Windows install or recovery media to create the

EFI system partition by using Diskpart and the create par efi command with any modifiers necessary to make it fit in the correct location.

I know Linux can use a Microsoft EFI partition but I do know if Windows can use a Linux version.

Yes, the bcd listing which shows the boot manager and OS loader.

It may have been easier to use a third party partition manager to change the size of the EFI partition.

If you might need it, here are the details of an EFI partition from Diskpart.

Partition 2

Type : c12a7328-f81f-11d2-ba4b-00a0c93ec93b

Hidden : Yes

Required: No

Attrib : 0X8000000000000000

Offset in Bytes: 524288000

Volume ### Ltr Label Fs Type Size Status Info

---------- --- ----------- ----- ---------- ------- --------- --------

* Volume 3 FAT32 Partition 99 MB Healthy System

 

Blank EFI Partition

I have an ASUS R558UR.

I had windows 10 installed on my laptop and I decided to again have a clean install of windows 10. I booted from USB and cleaned windows partition i.e. C drive and also cleaned EFI partition. I reformatted Drive and it had also created EFI partition of 100
MB. I installed windows on laptop and setted that up. After installing windows my laptop it started taking a long time to boot about 90 seconds but earlier it took only 7-10 seconds. After analysing everything I found that my EFI partition is blank.

Please suggest me how to write back EFI partition so as to reduce boot times.

Thanks in Advace.