Solved Resize C: D: partitions that have been encrypted with Bitlocker


msmcintosh

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I would like to increase the size of my C partition with space from my D partition. Both these partitions are encrypted using Windows 11 Home Bitlocker. I have unallocated space after the D partition. I see in Window's Settings that I can change the size of the partitions. I can't add space to my C partition, because there is no unallocated space after it to use. It's all after the D partition.

In older versions of Windows, I think there was the ability to move a partition, such as my D partition into some of the unallocated space after it. I own MiniTool Partition Wizard Pro. It's unable to move or resize the C and D partitions. I Imagine it has to do with the partitions being encrypted.

Is it possible to move and resize my C and D partitions, while they're encrypted? Or would I need to turn off the Bitlocker encryption to decrypt the partitions, move and resize them and then encrypt them again?
 

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SIW2

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Or would I need to turn off the Bitlocker encryption to decrypt the partitions, move and resize them and then encrypt them again?
From what I have read , I think you do have to do it that way. I can't confirm that from experience.

 

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zbook

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What is the time consumption for decrypting the partition?

Can it be performed overnight while sleeping?
Or does it continue into the next day for the partition involved?

Please make a free backup image before attempting to resize a bitlocker encrypted drive and save the image to another disk drive or the cloud.


Technology is a moving target.


It may be possible to resize encrypted disk drives using third party software.
Some third party software may have an unlock feature before resizing.
The time consumption for this feature was not displayed.
Reliability / unreliability when using this feature was not displayed.


Older threads from 2019 and 2021 had suggested bitlocker decryption first and others had reported problems without decryption first:


This was for Windows 7 and may or may not be applicable to Windows 11:


EaseUS has a Bitlocker unlock feature before resizing:



 

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msmcintosh

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I tried the free version of EaseUS Partition Master. After I selected how I wanted the partition configured, It popped up a message indicating it will turn off Bitlocker Drive Encryption before continuing. Maybe the unlock feature works with Bitlocker from the Pro version of Windows, not the Home version. The popup also indicated that encryption would need to be manually turned back on after the process.
 

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Ghot

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As for the encryption, I would decrypt them first.

As for resizing, etc., think of partitions like dominoes.
If you have space after the D: partition, add it to D: first.

Then resize D: by grabbing the left handle and shrinking D: to the right.
That will leave unallocated between C: and D:

THEN you can resize C: to use that new unallocated space.



Image1.png


Some partitioning programs will let you just "slide" the D: partition to the right, without changing it's size.
But ALL partitioning programs will let you do it like shown in the picture.
 
Last edited:

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zbook

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Please post images or share links displaying disk management.
(by default rows and columns are compressed and characters are cut off)

a) widen these rows: disk 0, disk 1, disk 2, etc. > make sure that no characters are cut off
b) widen these columns: Status and Volume > make sure that no characters are cut off




Run: (currently requires a Ten Forums logon)
Post a share link into this thread.
 

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msmcintosh

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I think I will only need to decrypt D:. Once I have unallocated space before D:, I can use Window's System > Storage > Disks & volumes > C: "Change size" to make C: larger without decrypting.
 

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msmcintosh

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1655603765895.png
 

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Ghot

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Here's another option.... start using backup software, like Macrium Reflect.
Then... instead of encrypting C: and D:, you can just encrypt the backups of C: and D:

AND... if you use the paid version of Macrium Reflect, you will also get Image Guardian.
Then you won't even have to encrypt the backups of C: and D:

With decent "guarded" backups... you don't even need Bitlocker.


Image1.png

And since a backup of C: is only about 1/2 the size of C:, backups and restores (if needed) are... fast.
 
Last edited:

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msmcintosh

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I have the paid version of Macrium Reflect. I back up every day. The backup is password protected.

Not that this has ever happened to me. Logging into Windows requires a PIN or my fingerprint. While the drive is in my laptop, that would protect the contents. But if someone removed the drive from my laptop, they could use a PCIe to USB adapter and read the contents.
 

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Ghot

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I have the paid version of Macrium Reflect. I back up every day. The backup is password protected.

Not that this has ever happened to me. Logging into Windows requires a PIN or my fingerprint. While the drive is in my laptop, that would protect the contents. But if someone removed the drive from my laptop, they could use a PCIe to USB adapter and read the contents.


You just have to set your drives up... properly. :)






All kidding aside... if you are in a situation where someone may get your drive... then yes... Bitlocker is a good idea.
 

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zbook

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When the script results are available it should confirm the multiple recovery partitions.
The orphaned recovery partition can be deleted.
This adds approximately 1 GB.

It's best to have a recovery partition immediately to the right of the Windows partition.

This way Windows will no longer create multiple recovery partitions when there is limited disk drive space.


Once D: is decrypted move it to the right.

The desired amount of unallocated space is then between C: and D:

This completes the D: drive decryption and now D: can be encrypted.


Decrypt C: then extend into the unallocated partition leaving 1 GB unallocated space between C: and D:

Disable the enabled windows recovery partition then delete both windows recovery partitions (849MB and 1 GB)

Recreate the new Windows recovery partition by performing an in place upgrade repair.
 

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msmcintosh

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This is a better drive image.

1655608431960.png
 

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zbook

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The reserved and system partition sizes appear to have been resized and repositioned as they are not the typical default values / locations.

The script results indicated that the active recovery partition is partition 5 (849 MB)



This method should merge these areas of the disk drive into one unallocated space: 93.15 GB + 849 MB + 32 MB = ~94 GB

What are the Samsung partitions at the end of the drive 0?
SAMSUNG_REC NTFS
SAMSUNG_REC FAT32

Open administrative command prompt and type or copy and paste:

sfc /scannow
dism /online /cleanup-image /restorehealth
chkdsk /scan
reagentc /info
reagentc /disable
reagentc /info

Post an image or share link displaying the commands with results.


After D: drive decryption:
a) delete the disabled recovery partition 849 MB
b) move the D: partition to the right creating the desired unallocated space to its right and left sides

The D: drive can be encrypted again.


These are trial and error steps:
After C: drive decryption:
a) extend the C: partition to the right leaving approximately 1 GB unallocated space to its right
b) perform an in place upgrade repair

If this creates a new recovery partition immediately to the right of C: then you're set.
The new recovery partition does not fill the unallocated space it can be disabled and moved to the right.
Then C: can be extend to fill the space so that the C: is immediately to the left of the recovery partition followed by enabling the recovery partition.
Then C: can be encrypted again.

The outcome should have this architecture: Reserved, System, C:, Recovery, D:, unallocated, Samsung ntfs, Samsung Fat32




Code:
  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Reserved           128 MB    17 KB
  Partition 2    System             260 MB   129 MB
  Partition 3    Primary            156 GB   389 MB
  Partition 4    Primary            664 GB   157 GB
  Partition 5    Recovery           849 MB   915 GB
  Partition 6    Recovery            14 GB   916 GB
  Partition 7    Recovery          1023 MB   930 GB

Code:
  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
  Volume 1     C   OS           NTFS   Partition    156 GB  Healthy    Boot
  Volume 2     D   Data         NTFS   Partition    664 GB  Healthy       
  Volume 3         SYSTEM       FAT32  Partition    260 MB  Healthy    System
  Volume 4         Windows RE   NTFS   Partition    849 MB  Healthy    Hidden
  Volume 5         SAMSUNG_REC  NTFS   Partition     14 GB  Healthy    Hidden
  Volume 6         SAMSUNG_REC  FAT32  Partition   1023 MB  Healthy    Hidden
 
Last edited:

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Mooly

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Unless I've missed it somewhere, what a trying this. No 3rd party tools required.

1/ Copy D to an external drive.

2/ Delete D taking it down to unallocated space in Disk Management Console and then merge into C.

3/ Make C the size you want.

4/ Recreate D using the space left.

5/ Copy contents back.

As to Bitlocker, well I've just done something similar with a new laptop and didn't hit any issues with Bitlocker on.
 

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cereberus

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Unless I've missed it somewhere, what a trying this. No 3rd party tools required.

1/ Copy D to an external drive.

2/ Delete D taking it down to unallocated space in Disk Management Console and then merge into C.

3/ Make C the size you want.

4/ Recreate D using the space left.

5/ Copy contents back.

As to Bitlocker, well I've just done something similar with a new laptop and didn't hit any issues with Bitlocker on.

This is simplest approach as D is hardly used. It is hard to tell of other partitions past D are useful but tidying them up is a bit tricky. Safest to move them all to far right using minitool partition wizard free if not sure which to delete (e.g. the oem partitions).
 

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zbook

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Unless I've missed it somewhere, what a trying this. No 3rd party tools required.

1/ Copy D to an external drive.

2/ Delete D taking it down to unallocated space in Disk Management Console and then merge into C.

3/ Make C the size you want.

4/ Recreate D using the space left.

5/ Copy contents back.

As to Bitlocker, well I've just done something similar with a new laptop and didn't hit any issues with Bitlocker on.


Did you use diskpart or disk management to extend the size of the encrypted C: partition?
Are you moving D: as an encrypted or decrypted partition?

Were there other threads or links indicating the success in resizing bitlocker encrypted partitions without decryption?
Or were there some with problematic results?

Did you use up to date backup images before you did something similar?
 

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Mooly

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Did you use diskpart or disk management to extend the size of the encrypted C: partition?
Are you moving D: as an encrypted or decrypted partition?
I used Disk Management only, however this was a new laptop with two internal drives, one C and one D. I had a bit of a play around tbh as I thought through what I wanted.

For what you showed earlier I would just try doing as I outlined. I can't see any issues doing it that way really.

This was my first time with Bitlocker and I left it set to encrypted while playing around.

No backup images when I was resizing everything because I knew I was going to clean install.

I find the hardest part is getting the partition sizes correct so they show as exact numbers (its just me, I like 'em exact) when viewed in File Explorer.

Screenshot 2022-06-19 135433.jpg

Screenshot 2022-06-19 135559.jpg
 

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msmcintosh

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In Settings it's either the whole drive is encrypted or it's decrypted. I decrypted the whole drive. I thought it was by partition, but it's not. It's a Samsung laptop and the last two partitions came with it.

This is the new layout with the expanded C:.

1655647000536.png

These are the results of the commands I ran from post #14.
 

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msmcintosh

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This is where I could resize partitions while the drive is encrypted.

1655647552118.png
 

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