unallocated space during install


  1. CapFlam128
    Posts : 61
    win 10 - 64
       New #1

    unallocated space during install


    When I i nstall win 10 from usb. My 4Tb barracuda is choppes in 2.
    See the image attached.unallocated space during install-20170615_163231.jpg

    Drive 0 unallocated space 2047 gb
    Drive 0 unallocated space 1678 gb

    Why I don't see drive 0 2047 and 1678 into 1 unallocated space and install it.
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  3. Bree
    Posts : 31,660
    10 Home x64 (22H2) (10 Pro on 2nd pc)
       New #2

    ntfs practical size limits...

    Microsoft TechNet said:
    For now, 2 terabytes should be considered the practical limit for both physical and logical volumes using NTFS.
    https://technet.microsoft.com/en-us/.../cc938432.aspx
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  4. NavyLCDR
    Posts : 18,432
    Windows 11 Pro
       New #3

    Bree said:
    ntfs practical size limits...

    https://technet.microsoft.com/en-us/.../cc938432.aspx
    That is only true when the drive is partitioned using MBR partitioning which computers with legacy BIOS or using CSM emulation in UEFI use. If @CapFlam128 has a computer with UEFI, it should be booted from the USB flash drive in UEFI mode, open a command prompt by pressing shift + F10 when the first screen appears, and run the following in the command prompt:

    diskpart
    select disk 0
    clean <- NOTE THIS ERASES THE ENTIRE DRIVE!
    convert gpt
    exit
    exit

    Then the drive will appear as a single unallocated space on the custom install drive and partitions list.
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  6. cereberus
    Posts : 15,485
    Windows10
       New #4

    NavyLCDR said:
    That is only true when the drive is partitioned using MBR partitioning which computers with legacy BIOS or using CSM emulation in UEFI use. If @CapFlam128 has a computer with UEFI, it should be booted from the USB flash drive in UEFI mode, open a command prompt by pressing shift + F10 when the first screen appears, and run the following in the command prompt:

    diskpart
    select disk 0
    clean <- NOTE THIS ERASES THE ENTIRE DRIVE!
    convert gpt
    exit
    exit

    Then the drive will appear as a single unallocated space on the custom install drive and partitions list.
    As addional clarification, occasionally, it is sometimes necessary to upgrade bios to see all of space even on a GPT drive - some older pcs limited maximum size to e.g. 3GB. Most likely not an issue but this can happen now and then.
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