Windows 10: Dynamic gpt disk to basic gpt disk without losing data

Hi, how do i convert dynamic gpt disk to basic gpt disk without losing data?

I know you can do it via disk management, but for me its greyed out.

I have 4tb one and i think why its greyed out is bc it will try to convert it to basic mbr disk (which supports only up to 2tb) and then to basic gpt, so is there a way to directly convert it without that middle step or lose of data ?

Thanks

submitted by /u/usedcz
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:)

 

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

 

GPT vs MBR for SSD OS Disk ? (win7 install)

So

I've got a new PC coming and this time it's the first time I will be using UEFI, i have read all the big stuff but I don't have the hardware yet so It's still kind of half baked but I'll do dig deep into it once I start building in the coming days.

I've read the win7 install guides, MS GPT FAQs (not fully yet), etc,

But I wish to know if:

I can use UEFI as an upgraded bios without having to use GPT disk format?

GPT disks can have any sort of partition cloning for full operational OS backup ?

Will GPT format improve performance on SDD or improve reliability in terms of data integrity or error rate?

When isntalling win7 with MBR but using UEFI, will it work normally without needing to uefi-boot the window7 install?


If I cannot backup my OS in a 100% clone that will boot normally when recovered, i will probably not use GPT, that shit is a step backward.

 

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.