1.    23 Nov 2015 #1
    Join Date : Nov 2015
    Posts : 3
    Windows 10

    How can I partition a 6TB HDD in Win 10?


    I have a new system running under Win 10 on which I want to use an SSD as the boot drive with all my s/w and a WD 6TB Black HDD for my data. However, when I format the 6TB drive it shows up as two unallocated segments, one of 2048.00 GB and the other with 3541.03 GB. The smaller one is available for a simple partition under Win 10 Disk Management, but actions for the larger one are all greyed out. When I make a simple partition in the smaller one the option to extend the partition is greyed out. Does anyone know the secret to using the full 6TB under Windows 10?
      My ComputerSystem Spec
  2.    23 Nov 2015 #2
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,196
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    You need to initialize the disk as GPT disk type. MBR disk type only allows to create partition of 2TB max.
      My ComputerSystem Spec
  3.    23 Nov 2015 #3
    Join Date : Feb 2015
    Posts : 3
    Dual Boot 10 Pro v1607 10 Pro rs2 build 14971

    It needs to be a GTP disk. You can rt click on the disk in disk management and convert to GTP.
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  4.    23 Nov 2015 #4
    Join Date : Nov 2015
    Posts : 3
    Windows 10
    Thread Starter

    Yes, but...


    Quote Originally Posted by topgundcp View Post
    You need to initialize the disk as GPT disk type. MBR disk type only allows to create partition of 2TB max.
    Thanks to you and JohnC. I should have thought of that myself. One reason I didn't may be because Disk Management shows no option to convert to GPT. I wonder whether this could be because I have the "home" Win 10 rather than the "pro". Any further suggestions?
      My ComputerSystem Spec
  5.    23 Nov 2015 #5
    Join Date : Jul 2015
    Posts : 9,551
    Windows 10 Pro

    Quote Originally Posted by woneil View Post
    Thanks to you and JohnC. I should have thought of that myself. One reason I didn't may be because Disk Management shows no option to convert to GPT. I wonder whether this could be because I have the "home" Win 10 rather than the "pro". Any further suggestions?
    MiniTool Partition Wizard Free:
    Best Free Partition Manager for Windows | MiniTool Partition Free

    You can also do it via diskpart commands, but I would have to look that up. MiniTool partition wizard won't destroy any data already on the drive, if you have data on it.
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  6.    23 Nov 2015 #6
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,196
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    No need to use third party partition. Open Admin command prompt:
    1. Diskpart
    2. list disk
    3. ========>Take a note of disk numder for the 6TB drive
    4. select disk # ====> # from step 3
    5. Clean
    6. Exit
    7. Open disk management. A windows popup. Select GPT to initialize.
      My ComputerSystem Spec
  7.    23 Nov 2015 #7
    Join Date : Nov 2015
    Posts : 3
    Windows 10
    Thread Starter

    Yes thanks, I'd already remembered about Diskpart and used it successfully to convert to GPT, after which Disk Management made me a 5.6TB primary partition without any problem. Diskpart is worth knowing about, see DiskPart Command-Line Options for its commands. You can do most of this via Disk Management, but not all.
      My ComputerSystem Spec

 


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