Windows 10: How can I change disk order? My C: drive is for someone reason not first which is confusing

submitted by /u/_Kristian_
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:)

 

Changing the drive that my Local Disk (C is on. Or uninstalling windows to reinstall to the correct drive.

Hello,

Thank you for posting your query in Microsoft Community.

I can imagine the inconvenience you have experienced. I will definitely help you with this.

As I can see from the above screenshot you have 1.8 GB of space Unallocated. I suggest you to extend the shrink volume back to C: drive by following the below steps.

• Go to disk management, press Windows key + R and type
  diskmgmt.msc and hit enter.
• From this page right click on C: drive
  and click on Extend Volume.
• Follow the onscreen instructions by selecting unallocated space.

Now you will get total amount of space in C: drive.

Kindly let us know if you need any further assistance with Windows. We are glad to assist you.

Thank you.

 

C: drive not on on disk 0 but on DIsk 2..Is that a problem?

Pretty sure the drive order is down to the SATA/ AHCI driver while in Windows regardless of BIOS/UEFI reporting (and at least on UEFI systems), my drive order was similar to yours, SSD was disk 0, HDD was disk 1, NVME was disk 3 (with Windows, and as boot drive), but installing the Intel RST driver for SATA/AHCI controller and the Intel NVME driver the order changed to reflect the physical order of disk connections.
So now it looks like this;




This is also reflected in Diskpart (run in admin command);




Currently my USB boot disks are being re-written so unsure how the drive order would appear listed from outside windows.

 

GPT disk conversion for both data drives and C drive


Macrium Rescue disk can be used to convert from MBR to GPT and vice versa without doing a fresh install of Windows.

1. Download Rescue6.1.1081X64.iso - Google Drive and use Rufus to create a bootable USB disk. Skip this step if you've already created the Macrium Rescue disk.
2. Download: BootEFI_Only-00-00.zip - Google Drive . Unzip to an external or an internal HD
   NOTE: This is a copy of the first 3 partitions of my current Windows 10 x64 (450MB Recovery, 100MB EFI and 16MB MSR)
3. Boot up Macrium Rescue disk and create a backup of your current Windows to another internal/external HD. It serves 2 purposes: you'd have a backup of your current Windows in case things go wrong and then use it to restore the C drive on the next steps.
4. Next, switch the BIOS to UEFI and use Macrium to restore the first 3 partitions downloaded in step 2 to your current MBR Windows. No need to convert or Format, Macrium will do it.
5. Again with Macrium, select the backup image from step 3, and copy back the C drive after the 3 partitions.
   After this step, you should have: 450MB, 100MB, 16MB and C drive (GPT partition scheme)
6. From Macrium, click on Fix the Windows Boot Problems
7. Reboot. Your Windows should be in UEFI mode.