Windows 10: EFI System Partition too small for Bitlocker

  1.    29 May 2018 #1

    EFI System Partition too small for Bitlocker


    Hi.

    I'm just picking up a comment by @NavyLCDR here - Windows 10 System Partition Requirement UEFI - NTFS or FAT32 - Windows 10 Forums

    NavyLCDR said: View Post
    You need to expand your FAT32 EFI System Partition to at least 350mb in size. I would recommend using MiniTool Partition Wizard to do it:
    Best Free Partition Manager for Windows | MiniTool Partition Free

    If you have the standard UEFI layout, you will have to take the space from the front of your C: drive partition (250 MB). There will be a small MSR partition that does not show up in disk management, you will have to move that over to the right, up against the new starting location of the C: drive partition. Then expand the EFI System Partition. Make sure to click the apply button. MiniTool will restart the computer to shrink the C: drive partition. The operation occurring when the computer reboots will look scary, but don't worry about it, it will do what it is supposed to do.

    I have this exact issue where by my EFI System partition is 260mb and I need it to be 350mb for Bitlocker to work and I have a 16mb Partition (Assume it's MBR) in between the EFI and C:\windows partition where I will need to take some of the space from.


    Click image for larger version. 

Name:	Capture.JPG 
Views:	0 
Size:	113.1 KB 
ID:	190540

    Can someone or @NavyLCDR expand on this with maybe some more instructions please? I am using MinitTool but can use any other tool

    Many thanks
      My ComputerSystem Spec

  2.    29 May 2018 #2

    The 16 met isnt mbr as your disk is gpt. It should be simple as you have over 500 meg unallocated so move c to the right into the free space and move all others to right then expand as needed
      My ComputerSystem Spec

  3.    29 May 2018 #3

    Thanks @Samuria.
    Should I delete the 16mb then?

    And how do I move the C drive into the 500meg of unallocated space? (I assume this will then give me 500meg before the C drive instead of afterwards?)


    Again, thank you
      My ComputerSystem Spec

  4.    29 May 2018 #4

    Hi. I've worked out how to free up space at the front of the C: \ Windows partition

    I just need to know what I need to do with the 16mb partition please?
      My ComputerSystem Spec

  5.    29 May 2018 #5

    cmac10 said: View Post
    Hi. I've worked out how to free up space at the front of the C: \ Windows partition

    I just need to know what I need to do with the 16mb partition please?
    Well, here is the thing. Nobody really knows. Nobody gets and adverse effect deleting it. It is allegedly reserved for future use but no indication from MS as to what.

    It is quite easy to recreate it if you ever need it.

    You can back it up using Macrium Reflect and restore it in future if yiu ever need it as well.

    I just delete it and have never had any issues.
      My ComputerSystem Spec

  6.    29 May 2018 #6

    Thanks for this @cereberus

    I have searched to see how to recreate it but i'm struggling, could you point me to some instructions please?

    I will try backing up using Macrium as you suggest, hoping the free one will do the job.

    Thanks again
      My ComputerSystem Spec

  7.    29 May 2018 #7

    cmac10 said: View Post
    Thanks for this @cereberus

    I have searched to see how to recreate it but i'm struggling, could you point me to some instructions please?

    I will try backing up using Macrium as you suggest, hoping the free one will do the job.

    Thanks again
    The free one is fine.

    To create an MSR partition, you use following diskpart command

    create partition msr size=16
      My ComputerSystem Spec

  8.    29 May 2018 #8

    The diskpart command works a treat. I don't think there's a need to back it up if you can create it that easily.

    I've made mine 130mb, just so that it fills the whole of the empty space.

    Click image for larger version. 

Name:	Capture.JPG 
Views:	0 
Size:	109.2 KB 
ID:	190559

    Thanks again
      My ComputerSystem Spec


 

Related Threads
Ok, so for my hard drive... it's been a wild ride... I first started partitioning my 2TB SATA Hard Drive for Hackintosh with multiple formats, Windows 7, Windows Vista, and a few disk checks... Recently I just deleted the other partitions and...
I have just got a 120gb SSD and i put it in my laptop along with my 1tb SSHD and my 32gb Mssd. now i would like to have this as my final output 120gb SSD holding ONLY windows files/installation and possible some small apps (bootable) and my...
I was wondering whether I could create a small partition on one of my HDDs and use the installation media creation tool to put the installation files on that and then set the BIOS to boot from that partition and start the process of installing...
W10 TPM Bitlocker asks erroneously for pwd on one data partition in AntiVirus, Firewalls and System Security
With a laptop W10 + TPM enabled with hard drive partitioned with C: = system; d: = users; e: = media; f: = the rest - all partitions BitLocker encrypted, all working beautifully well, I have an odd behaviour: after each W10 full startup, the...
Since I received the latest update over last weekend, a new small (un-named) partition has appeared at the end of my 'C' Drive - see attached screenshot. Previously there was only a single partition containing all files. Can anyone explain what...
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 23:56.
Find Us