Windows 10: GPT disks

Converted 2 drives to GPT (using diskpart utility from the "repair Windows"section of installation dvd) after deleting and removing all partitions and volumes.

Windows showed the 4TB drive as being the full size so it had been converted.

After windows installed both drives and back to MBR with the 4TB drive having 550MB for system reserved and a 2TB unallocated and the remaining portion not able to be allocated.

The boot drive is a 500 gig NVMe m.2


Have I missed something basic?

Thanks

Justin.

:)

 

Cannot convert GPT to MBR.

Hi Michael,



I suggest you to follow the below steps and check if it helps.

This method you have to backup all your data and delete all partitions and volumes. Then use the
DISKPART command.

• Open command prompt and type in DISKPART and press Enter
• Then type in list disk (Note down the number of disk you want to convert to GPT)
• Then type in select disk number of disk
• Finally type in convert gpt.

Hope the information helps. Do reply if you need further assistance.

 

OS on MBR, other disks GPT

Hi,

Problem

I don't see the Data Disks in the Windows Explorer

History: What I had before the problem occurred (worked fine)

• Disk 0: 450GB / NTFS / 4 Partitions / used as Windows Home Server OS Disk
• Disk 1: 4TB / GPT / Used as Data Disk
• Disk 2: 4TB / GPT / Used as Data Disk
• Disk 3: 4TB / GPT / Used as Data Disk

What I actually have

• Disk 0: 450GB / NTFS / 2 Partitions / used as Windows 10 Pro OS Disk
• Disk 1: 4TB / GPT / Used as Data Disk
• Disk 2: 4TB / GPT / Used as Data Disk
• Disk 3: 4TB / GPT / Used as Data Disk

What I see in the Windows Disk Management

• Disk 0: Basic, Online
  
  System Reserved, 500MB NTFS, Healthy (System, Active, Primary Partition)
  
  (C, 465 GB NTFS, Healthy (Boot, Page File, Crash Dump, Primary Partition)
• Disk 1: Basic, Online
  
  2048 GB, Healthy (GPT Protective Partition)
  
  1678 GB, Unallocated
• Disk 2: Basic, Online
  
  2048 GB, Healthy (GPT Protective Partition)
  
  1678 GB, Unallocated
• Disk 3: Basic, Online
  
  2048 GB, Healthy (GPT Protective Partition)
  
  1678 GB, Unallocated
• Disk 4: Basic, Online
  
  2048 GB, Healthy (GPT Protective Partition)
  
  1678 GB, Unallocated

What I see in the Windows Explorer

• Local Disk (C

What am I doing wrong?

Moved from: Windows / Windows 10 / Devices & drivers

 

Converting a MBR disk to a GPT disk

I would put Windows on Disk 2. There is plenty of space. If you want to start with a clean slate then you should do this:

• Disconnect disks 0 and 1.
• Boot the machine with your installation medium.
• Launch diskpart.
• Select disk 0 (it was disk 2 before).
• clean.
• Reboot with your installation medium.
• Install Windows.
• When it runs nicely, connect the other disks and tell the BIOS which is the primary disk to boot from.

Since disk 2 is only 232 GBytes you will not need UEFI / GPT. After Windows is installed you can convert the 3 TByte disk to GPT.