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I installed Ubuntu 12.04 64-bit side by side with my previous 11.10 32-bit.

As everything is working correctly, I want to eliminate the old partition.

According to update-grub:

Found Ubuntu 11.10 (11.10) on /dev/sda1

But according to GParted, /dev/sda1 is the boot partition!

So, how can I discover which partition should be the boot partition for 12.04? Can I safely eliminate the /dev/sda1?

Also, GParted gives /dev/sda5 as file system unknown, it's 2.93Gib and might be the swap partition (just guessing).

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Do you have Windows installed in your computer? –  Anwar Shah Sep 14 '12 at 14:33
    
@Anwar. No, just Ubuntu 11.10 and 12.04 as stated –  GUI Junkie Sep 14 '12 at 14:36
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1 Answer

up vote 2 down vote accepted

Follow these procedures:

  1. Delete the /dev/sda1 partition from Gparted

  2. Create a new partition on /dev/sda1 from Gparted and also a new file system by formatting it.

  3. Open a terminal and type this command

     sudo grub-install /dev/sda
    
  4. Then run this command:

    sudo update-grub
    

It should help you to get rid of that old partition.


1. Learn about Active partition or boot flag here

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Would it not be safer to check first with the boot flag on the correct partition? –  GUI Junkie Sep 14 '12 at 15:03
    
Also, I'd like to join the two partitions. I think the new partition is on /dev/sda6 –  GUI Junkie Sep 14 '12 at 15:05
    
@GUIJunkie After creating a new partition, you can set boot flag in that partition by selecting it, right clicking and selecting "manage flags" from the menu. Boot flag is for a Windows OS afaik. Grub doesn't need boot flag. –  Anwar Shah Sep 14 '12 at 15:08
    
@GUIJunkie You can't join the two partition if another partition exists between them. I suggest you to ask another question after doing the deletion stuff –  Anwar Shah Sep 14 '12 at 15:09
    
OK, the old partition and Grub2 entry are gone :-) –  GUI Junkie Sep 14 '12 at 15:20
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