I want to install ubuntu as second OS beside win10 on my ssd.

First i tried to shrink my ssd in win10 with diskmgmt.msc. i have 75GB free space on the hdd, but just can shrink it by 9gb, obviously not enough. Also i saw, that diskmgmt.msc shows my c-drive as "File System: NTFS (Bitlocker Encrypted)". But my Bitlocker is deactivated.

so i tried to do it in ubuntu-live with gparted. Gparted only shows me "unknown" for free space and used space.

ofc the ubuntu installer doesn't allow me to shrink it enough too.

Maybe a useful information: see_screenshot_here

PS C:\WINDOWS\system32> manage-bde -status c:
BitLocker Drive Encryption: Configuration Tool version 10.0.17134
Copyright (C) 2013 Microsoft Corporation. All rights reserved.

Volume C: [Windows]
[OS Volume]

    Size:                 217,13 GB
    BitLocker Version:    2.0
    Conversion Status:    Used Space Only Encrypted
    Percentage Encrypted: 100,0%
    Encryption Method:    XTS-AES 128
    Protection Status:    Protection Off
    Lock Status:          Unlocked
    Identification Field: Unknown
    Key Protectors:       None Found

I am not even sure if this Bitlocker status causes the problem that i can't shrink my ssd enough.

thank you in advance!

  • If you defragment the drive you may be able to shrink it more, but like you I don't know how BitLocker affects this. – AFH Jan 11 at 16:00
  • thanks, already tried - didn't helped – Chris Jan 11 at 16:01

The bad news: While bitlocker is in status "Protection off", it is still there. This means, you can't shrink from outside the system. From inside the system you are at Microsoft's mercy - they think only 8 out of 217 GB should be freed.

The good news: 8G is more than enough for Ubuntu - I typically use root partitions of 8G even on Petabyte-scale storage servers.

  • thanks for your answer. while 8GB is enough for you, unfortunately it isn't enough for me. Ubuntu will be my main OS, so most files should be located in my Ubuntu partition. i do lots of coding, and after some time i surely need more than 8GB :( – Chris Jan 11 at 15:59

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