Windows 10: How to make GPT volume bootable

I'm not sure the history is too helpful as the question says it all, but here it is.

On an Acer predator G3-605 I had a mSATA 60GB SSD as system disk that was too small. I bought a larger replacement and used Acronis True Image 2019 to clone it. The clone was successful in that the files all appear to be copied, but when examined using Disk Management I see that the disk is not shown as Active, Bootable.

Although I am certain that I at no time cloned from larger disk to smaller, neither disk now is bootable ! And the O&O image I took before I started this also, when used to restore from, produces a disk that is not bootable. Baffled.

Reinstalling Windows then restoring all documents and reinstalling all programs is clearly one way forward, but I just want something like DISKPART ACTIVE that would remedy the problem. I don't know enough to know why there is no such command (as far as I know) for GPT disks.

:)

 

clone MBR HD to bootable GPT partition?

Hi,

1. You cannot convert mbr to gpt without data loss. otherwise, you can follow directions here:

FROM WINDOWS RECOVERY CONSOLE:

To change a master boot record disk into a GUID partition table disk using a command line

• 
  Back up or move the data on the basic master boot record (MBR) disk you want to convert into a GUID partition table (GPT) disk.
  
• 
  Open an elevated command prompt (right-click Command Prompt, and then click Run as Administrator) and type diskpart. If the disk does not contain any partitions or volumes, skip to step 6.
  
• 
  At the DISKPART prompt, type list disk. Make note of the disk number you want to convert.
  
• 
  At the DISKPART prompt, type select disk <disknumber>.
  
• 
  At the DISKPART prompt, type clean.
  

2. I'd suggest converting your vista drive to a virtual machine, load that up on your windows 10 system and use a program like virtualbox to run it.

 

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.

 

What are GPT Volumes and MBR Volumes?

What are the implications of having a GPT Volume and a MBR Volume on different drives. Can they work together? I am running both on different drives on a Windows 10 machine. I seem to be having partition problems on the GPT ones. What restrictions are
on the GPT volume?