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Windows 7: Hard drive shown as 2 disks - how to combine?

07 Jun 2016   #1
resucami

Windows 7 Ultimate
 
 
Hard drive shown as 2 disks - how to combine?

I have a 3 TB hard drive connected to a Windows 7 computer. The very first time I connected this hard drive Windows "lured" me into formatting the drive and the result was that the drive showed up as a 750 GB hard drive. Whatever I tried later to get this drive back to 3 TB failed. Now this drive shows up in Disk Management as

Disk 1
Basic
2047.88 GB .......... 2047.88 GB
Online ................. Unallocated

and

Disk 2
Basic
749.39 GB ............ 746.39 GB
Online .................. Unallocated

How can I reformat this disk back to being one disk with 3 TB?

Thanks for your help.


My System SpecsSystem Spec
.
07 Jun 2016   #2
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

Post a maximized/resized screen print of Disk Management so all info is displayed using these instructions:
Disk Management - Post a Screen Capture Image

MY GUESS is you will need to initialize the 3TB HD as GPT to use it as a single drive/partition.
My System SpecsSystem Spec
07 Jun 2016   #3
resucami

Windows 7 Ultimate
 
 

OK, here it is:


Attached Thumbnails
Hard drive shown as 2 disks - how to combine?-diskmanagement.png  
My System SpecsSystem Spec
.

07 Jun 2016   #4
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

That doesn't show all info, you didn't follow the tutorial instructions.
The "C" drive isn't shown in the bottom pane.
I'm guessing it is Disk 0, but you didn't scroll the bottom pane to the top.

I'm guessing you have a Legacy BIOS / MBR boot disk, but i can't be sure with what you displayed.

EDIT:
I see you updated the screen print !
My System SpecsSystem Spec
07 Jun 2016   #5
resucami

Windows 7 Ultimate
 
 

I updated the screen shot already and it shows now also C.

I think Disk 1 and Disk 2 (which is physically one 3 TB disk) are both GPT drives. When I right-click Disk 1 or Disk 2 I have these options:

New Spanned Volume...
New Striped Volume...
Convert to Dynamic Disk...
Convert to MBR Disk
Properties
Help
My System SpecsSystem Spec
07 Jun 2016   #6
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

I would get Partition Wizard (PW) and see what you can do.
I'm assuming you have nothing on the 3TB drive you need to keep (they are unallocated now).
https://www.partitionwizard.com/free...n-manager.html

With PW you can delete your 2 partitions on the 3TB, then initialize it as GPT.
See if that makes a difference.

A 3TB drive can be initialized as GPT on a Legacy BIOS/MBR OS using full capacity for a single drive/partition.
My screen print shows i have this.
If that doesn't work, it may be an issue with the specific HD make/model you have.

I can't test the exact steps to do this in PW, i don't want to lose what i have on my 3TB HD.

Hard drive shown as 2 disks - how to combine?-diskmgmt-02.png


My System SpecsSystem Spec
07 Jun 2016   #7
resucami

Windows 7 Ultimate
 
 

Thanks. I deleted the partitions. However, I still see 2 separate GPT volumes ... and I don't know how to make them into one. To me it seems as if these two volumes are not seen as partitions but as truly two physically different disk (but I'm not sure I know at all what I'm talking about here).

The hard drive is a Seagate ST3000DM001. I'm sure it came originally formatted as one 3 TB drive. It was this darn reqeust by Windows to initialize it when it got connected the first time that screwed it up.


Attached Thumbnails
Hard drive shown as 2 disks - how to combine?-pw1.png  
My System SpecsSystem Spec
07 Jun 2016   #8
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

You could do a diskpart clean to see if that will help fix this.
That should remove any junk that may be causing a problem.

Disk - Clean and Clean All with Diskpart Command
My System SpecsSystem Spec
07 Jun 2016   #9
resucami

Windows 7 Ultimate
 
 

... just found another option in PW to delete partitions. One minute ...

(Looks like it takes more than just one minute. Will report here as soon as PW is done with the job.)
My System SpecsSystem Spec
07 Jun 2016   #10
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

No problem, if that doesn't help did you see my post about using diskpart clean ?
My System SpecsSystem Spec
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