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Windows 7: Cannot partition unallocated space on 4TB hard drive

11 Jan 2015   #21
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Ignatz, Creating the partitions ahead of time is always a good idea. And why does he not check in the properties of the disk whether he really has a GPT disk now.




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Cannot partition unallocated space on 4TB hard drive-2015-01-11_0105.png  
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11 Jan 2015   #22
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by tahaminey View Post
So do I do everything again in command prompt and when it says successful just do the added instructions to create primary partition as 4tb?

I will try. Give me some time. I am a bit slow.
That's right.

"create partition primary" would give you a C covering the entire drive, which you could later shrink.

"create partition primary size=200000" would give you a C of 200 GB and leave the rest unallocated, which you could later make into partitions as desired after installing Windows.

Don't attempt to make more than 4 standard primary partitions---DO NOT ever say yes to a choice mentioning "dynamic disks". You may have to use logical disks, which is fine.

I'd make a single C of the desired size in Diskpart, if you know how large you want it to be. Worry about the other partitions after you get Windows installed.
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11 Jan 2015   #23
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by whs View Post
Ignatz, Creating the partitions ahead of time is always a good idea. And why does he not check in the properties of the disk whether he really has a GPT disk now.
He says in post 14 and 16 that he did check and found that it was MBR. So he then tried Seagate Disk Wizard to simulate 2 different disks when in fact there is only a single drive in the PC.
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11 Jan 2015   #24
tahaminey

Windows 7 Home Premium 64 bit
 
 

I will create a c partition of 800gigs. Well see if it works this time.
Going to do this now.


Btw I am a she ^__^
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11 Jan 2015   #25
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by tahaminey View Post

Btw I am a she ^__^
Aye aye, madame.

Good luck.

After you run those extra commands, just exit diskpart as before. Don't reboot. Continue on with the Windows installation. When it completes, check again to see if you have an MBR disk or a GPT disk.

We'll get it sorted one way or the other. WHS is very skilled in this.
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11 Jan 2015   #26
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

"
Quote:
create partition primary" would give you a C covering the entire drive, which you could later shrink
Primary active is better. Then you do not get a system partition on installation.
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11 Jan 2015   #27
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Quote   Quote: Originally Posted by whs View Post
"
Quote:
create partition primary" would give you a C covering the entire drive, which you could later shrink
Primary active is better. Then you do not get a system partition on installation.
Are the commands in post 17 accurate?

Is there any need to assign the drive letter in Diskpart? Or can it just be ignored and just direct the installation to the pre-made partition?
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11 Jan 2015   #28
tahaminey

Windows 7 Home Premium 64 bit
 
 

Okay I am in command prompt and it says successfully converted disk to GPT format.

What is my next step?
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11 Jan 2015   #29
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Btw - for resizing such a big partition, you will most likely need the Partition Wizard again because disk management cannot move the MFT (master file table) which sits in the middle of the empty space of the partition.

How to Move/Resize Partition | MiniTool Partition Wizard Tutorial
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11 Jan 2015   #30
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by tahaminey View Post
Okay I am in command prompt and it says successfully converted disk to GPT format.

What is my next step?
Run these commands:

Diskpart
List disk
Select disk n (where n is the number that was given for your HDD in List disk)
Clean
Create partition primary size=800000
Format fs=ntfs quick
Active (assuming you want to install an OS)
Exit
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 Cannot partition unallocated space on 4TB hard drive




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