1.    30 Aug 2017 #1
    Join Date : Oct 2014
    Michigan USA
    Posts : 277
    Windows 10 64-bit Home

    6tb external hard drive reads 1.5tb unallocated in Windows 10?


    Using a new 6tb external hard drive plugged into a USB port for backup. Need to format but it only reads 1.5tb of unallocated space in Windows 10? Is this an Intel RST driver issue? If so, how can I tell if the RST driver need updating?

    Windows 10 64-bit ver 1703 OS Build 15063.540
    AMD 1700 8-core
    Asus Prime X370-Pro MB
      My ComputerSystem Spec
  2.    30 Aug 2017 #2
    Join Date : Jul 2015
    Posts : 9,344
    Windows 10 Pro

    Try using diskpart. With the drive connected, open a Command Prompt (Admin) or Powershell (Admin) and run:

    diskpart
    list disk
    select disk # <- replace the # with the actual number assigned to the 6TB external hard drive
    clean <- this will completely erase the drive selected above, make sure it is the new external drive!
    convert gpt
    exit
    exit

    You should then see 6tb unallocated space in Windows that you can partition and format however you like.
      My ComputerSystem Spec
  3.    30 Aug 2017 #3
    Join Date : Oct 2014
    Michigan USA
    Posts : 277
    Windows 10 64-bit Home
    Thread Starter

    Quote Originally Posted by NavyLCDR View Post
    Try using diskpart. With the drive connected, open a Command Prompt (Admin) or Powershell (Admin) and run:

    diskpart
    list disk
    select disk # <- replace the # with the actual number assigned to the 6TB external hard drive
    clean <- this will completely erase the drive selected above, make sure it is the new external drive!
    convert gpt
    exit
    exit

    You should then see 6tb unallocated space in Windows that you can partition and format however you like.
    Thanks. It appears the issue was because I had the new, unformatted drive setup as an external USB drive. I have since connected the drive in my case via SATA & now able to format to NTFS all 6Tb. I'll move it back to USB but I'm guessing it will be okay now that it's formatted.
      My ComputerSystem Spec

 


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