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Windows 7: Unallocated hdd split into 2

10 Jan 2014   #1
Lemon Tree

Windows 7 Home Premium 64bit
Unallocated hdd split into 2


Today right before I can install windows 7 into my new pc one of my unallocated hdd happened to be split into 2.

Was wondering would anyone happened to know the cause of this issue and know any way to fix it before installing windows 7. Many thanks in advance.

Attached Thumbnails
Unallocated hdd split into 2-image.jpg  
My System SpecsSystem Spec
10 Jan 2014   #2

Windows 7 Ultimate x64

Your hard drive is using the MBR (Master Boot Record) format and the maximum partition size for this is 2TB. If you want to use the whole disk size you must reformat it under the GPT (GUID Partition Table) format which is what the 'Disk 1 Unallocated Space' is currently set as.

To change this, boot into Windows after setup and go to the Disk Management tool under Computer Management. The guide below will explain how:

Convert MBR Disk to GPT Disk
My System SpecsSystem Spec
10 Jan 2014   #3

Microsoft Community Contributor Award Recipient


To use a 3TB/4tb HDD as a boot drive, you need a motherboard with a UEFI/BIOS firmware.

Remove the two 3tb./4tb HDD's & install Windows 7 x64 to the 500gb HDD.
My System SpecsSystem Spec

12 Jan 2014   #4
Lemon Tree

Windows 7 Home Premium 64bit

Sweet thanks guys.
My System SpecsSystem Spec
13 Jan 2014   #5
Microsoft MVP


Or you can install to 500gb as suggested, then plug back in the larger drives, change them to GPT in Disk Mgmt as also suggested, then use them as data drive. Theog's point is that you just can't boot Win7 off a GPT drive unless you have UEFI. If so, boot the installer as a UEFI DVD or stick to install.
My System SpecsSystem Spec

 Unallocated hdd split into 2

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