I have Ubuntu on my notebook and want to install Mint too. I've gone through the installation process but when it is time to partition the disk, I get stuck (it doesn't allow me to create the partitions)

Below an image, where I can't partition the hard disk:

enter image description here

I need to finish the installation.

  • And when you press change? – user1133275 Feb 28 '19 at 15:36
  • @user1133275 no changes... – user233553 Feb 28 '19 at 15:52
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    Maybe a bug or it's a partition type that it cannot detect? If this is the Mint installer, then reboot and try to use gparted in Ubuntu to create and format the partition. Then reboot again and try to manually select this partition in the Mint installer. It's strange that the partition type is not detected... – Freddy Feb 28 '19 at 16:15
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    In the existing Ubuntu, install gparted, and then shrink the partition /dev/sda3 (it is un-recognised by this partition editor, but hopefully will be my ubuntu). You may need to un-mount it first (that is another question). – ctrl-alt-delor Feb 28 '19 at 16:52
  • Do you have an encrypted partition? – Fabby Feb 28 '19 at 22:16

You have one encrypted partition on Ubuntu, but as you did not know how you installed it, the easiest way to get rid of it is to:

  • Boot Ubuntu
  • Backup all your data to an external disk in FAT32¹
  • Install Mint; wiping the entire disk
  • Install Ubuntu
  • Restore your backup

Note¹: FAT32 does not allow you to encrypt data, so you won't accidentally encrypt it without knowing

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  • If you need more help with any of the above steps, let me know and I'll expand the answer. – Fabby Mar 1 '19 at 7:07
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    thanks. i've tried yesterday and it seems that mint installer recognize ubuntu and it changes the 'normal' installation steps. – user233553 Mar 1 '19 at 18:06

You have no free space, and would need to delete partitions before creating partitions, as you are at the maximum number of primary partitions on a disk.

You have a few choices... if the existing partitions are those that you do not want, you can delete them all, and then start over, use the existing ones, or take the large "unknown" partition and use that one.

You may also want to look up some resources on partitioning ubuntu:




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  • Uhmm the existing partitions were created automatically by ubuntu. I dont think they can be removed... – user233553 Feb 28 '19 at 15:52
  • @number9 The disk has an EFI System Partition, which suggests GPT partitioning. GPT does not have a four partition limit. – Johan Myréen Feb 28 '19 at 15:52
  • You need no remove; just resize howtoubuntu.org/… – Rusi Feb 28 '19 at 16:46
  • @JohanMyréen Ah that is true.. But I would still think he would need to start over after removing or resizing all of the partitions if they are not needed. – number9 Feb 28 '19 at 16:52

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