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I can't format my hard disk for Ubuntu installation. It has Fedora installed in it. I wonder how to unlock the locked partition to delete and format it, since I am stuck at installing Ubuntu. I am now using a livecd to do the task. No options are available for me to use.

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have you considered deleting the partition from Fedora ? – Srinivas Gowda Nov 15 '12 at 13:03
I am trying to delete it, but it is locked. – owl Nov 15 '12 at 13:29
Force unmount the partition. Look into my answer below. – Srinivas Gowda Nov 15 '12 at 13:34

3 Answers

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Open a Terminal on Ubuntu (live cd) and force unmount the partition.

sudo umount -f /dev/sda2
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unmount doesn't exist, you want umount. – Mike Turley Apr 11 at 2:45
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If it's LVM Partition, you will need to delete it using the command lvremove then it will remove the lock only then you can delete the partition.

use lvscan to view the volume.

use lvremove to remove it

check man page for details

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This was the solution for me! – Mike Turley Apr 11 at 2:45
up vote 0 down vote

Open the Ubuntu Installer and click "Install Ubuntu", then continue untill you see "Erase disk and install Ubuntu". It will erase the entire disk and use all of it for installation. Ubuntu will automatically partition your disk and proceed with installation. For more information about installing Ubuntu, you can visit this page. You don't need to format the hard disk before you install Ubuntu, the installer does it automaticaly.

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