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  1. Joined : Mar 2016
    Posts : 2
    win10
       22 Mar 2016 #1

    Installation on 3TB disk (Non Uefi)


    Hi everyone!

    I was wondering if there is an easy way of installing W10 in larger disks (+2TB) on systems with no UEFI Support

    Right now my HDD is formatted with MBR, windows 10 is installed in it, and have ~700GB of unallocated space wich i cant use due to partition limitations

    Additionally, I have a slower and smaller hdd.

    The goal is to install W10 on the larger hdd. It has to be gpt

    any advice will be appreciated

      My System SpecsSystem Spec


  2. Joined : Jul 2015
    Posts : 48
    Win10
       22 Mar 2016 #2

    If you want to have your boot drive GPT, then it has to be UEFI boot.

    For non-EUFI, I believe your only option is to partition the drive into a 2TB and a 1TB partition and install OS on the 2TB partition.

    You can do MBR which has 2TB limitation or GPT which requires EUFI for boot drive, but those are your options.

    (You can have GPT for non boot drives without EUFI though so you could also use a different drive for boot)
      My System SpecsSystem Spec


  3. Joined : Jul 2015
    Posts : 6,847
    Windows 10 Pro
       22 Mar 2016 #3

    chemie said: View Post
    For non-EUFI, I believe your only option is to partition the drive into a 2TB and a 1TB partition and install OS on the 2TB partition.
    You can do it the other way around, also, install Windows 10 on the 1 TB partition and use the larger 2 TB partition for data storage. Also, with MBR and legacy bios, you can move the boot files to the Windows OS partition and delete the System reserved boot partition which will free up a space for another data partition if you want. Heck, you can also move the WindowsRE environment off the recovery partition and into the Windows OS partition so you would only need 1 partition for Windows itself and have three empty slots for partitioning however you would want to.
      My System SpecsSystem Spec


  4. Joined : Dec 2015
    Posts : 2,428
    Windows10
       22 Mar 2016 #4

    NavyLCDR said: View Post
    You can do it the other way around, also, install Windows 10 on the 1 TB partition and use the larger 2 TB partition for data storage. Also, with MBR and legacy bios, you can move the boot files to the Windows OS partition and delete the System reserved boot partition which will free up a space for another data partition if you want. Heck, you can also move the WindowsRE environment off the recovery partition and into the Windows OS partition so you would only need 1 partition for Windows itself and have three empty slots for partitioning however you would want to.
    You cannot use more than 2.2TB in TOTAL on an MBR drive (no matter how many partitions) without using special driver software.

    Support for Disk Drives Beyond 2.2 TeraBytes (TB) and 4K Advanced Format Sectors
      My System SpecsSystem Spec


  5. Joined : Jul 2015
    Posts : 6,847
    Windows 10 Pro
       22 Mar 2016 #5

    Thanks! So what about this, maybe you know, @cereberus. Format the 3TB drive as GPT and install it as the second drive. On the slower, smaller drive put only a System Reserved partition, put the OS partition on the large GPT drive. Are there drivers in the boot files to then enable Windows to boot from the GPT drive from a legacy bios? Or do the GPT drivers get loaded with Windows? Then the slower hard drive would only be loading the boot files.
      My System SpecsSystem Spec


  6. Joined : Dec 2015
    Posts : 2,428
    Windows10
       22 Mar 2016 #6

    NavyLCDR said: View Post
    Thanks! So what about this, maybe you know, @cereberus. Format the 3TB drive as GPT and install it as the second drive. On the slower, smaller drive put only a System Reserved partition, put the OS partition on the large GPT drive. Are there drivers in the boot files to then enable Windows to boot from the GPT drive from a legacy bios? Or do the GPT drivers get loaded with Windows? Then the slower hard drive would only be loading the boot files.
    Might work theoretically, but not even sure how you would do this, as windows installation would not install to a gpt disk. Might be able to use Macrium to clone C drive only to GPT drive, but getting it to boot?

    Frankly, it would just be easier to buy a small (say 256GB) ssd and use that as the OS drive.
      My System SpecsSystem Spec


  7. Joined : Mar 2016
    Posts : 2
    win10
       22 Mar 2016 #7
      My System SpecsSystem Spec


  8. Joined : Dec 2015
    Posts : 2,428
    Windows10
       22 Mar 2016 #8

    The trick here is to convert drive to gpt not losing data. I think minitools partition manager free can do that.

    Looks theoretically possible. Upgrades could be a problem though

    I would still recommend getting an ssd and avoiding the problem.
      My System SpecsSystem Spec


  9. Joined : Oct 2013
    Posts : 1,962
    Windows 7
       22 Mar 2016 #9

    700GB of unallocated space wich i cant use due to partition limitations
    What is that problem. I don't think you need GPT. MBR may suffice. Why don't you post a picture of your disk management.
      My System SpecsSystem Spec


  10. Joined : Dec 2015
    Posts : 2,428
    Windows10
       22 Mar 2016 #10

    whs said: View Post
    What is that problem. I don't think you need GPT. MBR may suffice. Why don't you post a picture of your disk management.
    Reason is simple - MBR maximum drive size is 2.2TB - see my link earlier.
      My System SpecsSystem Spec


 
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