I have been trying to figure this out for a couple days.

I want to dual boot Ubuntu and Windows.

I have windows on a SSD that I left 30gb unallocated space for Ubuntu ,also have 3 1tb

HDD set up as a raid 5, this is all fresh installed on a new machine.

My problem is Ubuntu wants to install on one of the hdd in the raid and not the partition on the SSD. I even unplugged all the raid 5 HHDs and then the installer doesn't see Windows.

What do I need to do to get this to work?

I do know that the SSD is set to IDE in the BIOS, that was the only way I could get windows on it with the DVD ROM I have. and Ubuntu doesn't see the raid it just shows individual hdd.


  • windows 64bit
  • gigabyte ga-990fxa-ud3
  • amd fx-3250
  • legacy raid
  • Is it Windows 8 or higher? Does the computer have UEFI instead of BIOS? Please edit the question with new information. – user68186 Jan 27 '14 at 20:10
  • Just for clarity - is the 30gb of unallocated space IN the windows partition? – Xavier J Jan 27 '14 at 21:34
  • Using LiveCD, do you see the partition if you install and run GParted? – Mendhak Jan 27 '14 at 22:08
  • yes when i run the live and go to gparted i see the 120gb ssd with the 90gb windows partition, and then there is 30gb unalocated – user240665 Jan 28 '14 at 0:23

Choose “Something Else” during installation.

enter image description here

A new screen will pop out letting you choose where to install Ubuntu, format, make partitions, etc. Follow carefully the bellow:

Choose the SSD (I refer to it as /dev/sda here. Yours may be different.) and create two partitions in the unallocated space as follows:

  • Use most of the 30GB for the / partition. Leave 2 to 4GB at the end for the swap partition. The / partition should be of the type ext4 and have mount-point of / as below:

enter image description here

  • The swap partition should be of the type "Swap Area" with no mount-pont.

The device for boot loader installation should be the default the /dev/sda.

Hope this helps

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