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I have an old AMD system running Windows 7 x64.

I recently upgraded to a 3TB drive (from 512GB), cloning my old drive contents over with Acronis.

Long story short, it shows up as a 748GB disk.

Yes, the disk is MBR. My mobo doesn't support UEFI, so I can't go to GPT.

I booted into GParted, and I can see the full size of the drive, 3TB. I resized the partition to 1.9TB...

It won't boot into Windows.

What am I missing here? Apparently it's my windows installation that won't accept a drive larger than 748GB.

I see other topics talking about this, and GParted fixes the issue. In windows my drive can't be any larger than 748, or it won't boot.

I see people talking about needing Intel RST, but my chipset is AMD64.

Is there a patch I can install to get my OS to work with a boot drive that is larger than 748GB?

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  • You may create some more partitions to use the remaining space - I'm really not sure -. The limit for MBR seems to be 2.2TB (?). superuser.com/questions/1229390/…
    – user931000
    Commented Nov 10, 2018 at 19:55
  • I tried 1.9 TB and still can't boot.
    – Gorchestopher H
    Commented Nov 10, 2018 at 20:04
  • So keep it like this and create other partitions? Why do you think you need a bigger system partition? You don't. There are laptops being sold right now with Windows 10 in a 64GB drive. The BIOS itself can have limitation too.
    – user931000
    Commented Nov 10, 2018 at 20:10
  • @GabrielaGarcia I can't add another partition, any allocation beyond 748 total on the disk prevents boot. In Windows the disk only shows 748 total.
    – Gorchestopher H
    Commented Nov 10, 2018 at 20:27
  • Let's see if I'm understanding you correctly: Are you saying that creating additional partitions with GParted yet keeping the Windows system partition exactly as it is, prevents booting? If so, that's a BIOS limitation, an update (if available) may or may not solve it.
    – user931000
    Commented Nov 10, 2018 at 20:32

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