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I have been trying to do this setup right but it just doesn't work as I would wish to. First thing, I'm legacy, bios and have MBR so number of max partitions is 4. I already have 4 so it displays the 5th one I created for ubuntu as "unusable". So my goal is to take a partition from the second drive (Disc D) and install Ubuntu there. I tried the MBR to GPT conversion, seems like my laptop doesn't support it, which is weird since it's not that old of a laptop (Dell Inspiron 5559) Any help?

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  • What program did you use to try to convert the second drive from MBR to GPT? If Windows Disk Management doesn't work maybe try running GParted partition editor from a bootable Ubuntu USB live session.
    – karel
    Oct 3, 2020 at 16:11
  • I tried via cmd, is there something I missed?
    – bazic
    Oct 3, 2020 at 16:14
  • Maybe Windows cmd won't let you convert the second drive from MBR to GPT for some reason that is specific to Windows. GParted is an open source application, so there is no reason why GParted wouldn't let you convert the drive from MBR to GPT. That's one of the reasons why GParted is included in the Ubuntu iso file.
    – karel
    Oct 3, 2020 at 16:15
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    No, that's what I thought. It's actually a different partition.. So I can't think of any way to install it alongside Windows 10.. the 4 partition thing is really limiting me
    – bazic
    Oct 3, 2020 at 18:27
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    Post details, so we can see: sudo parted -l converting from MBR to gpt normally erases drive. But you can convert in place, but either way you need good backups of data on drive. And good backups whenever making major changes to system. Converting to or from GPT - must have good backups. rodsbooks.com/gdisk/mbr2gpt.html
    – oldfred
    Oct 3, 2020 at 20:13

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