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I have installed ubuntu 12.04 lts I have 500 gb single partitioned hard disk on which this ubuntu is installed

now i want to create two partition but when I try using gparted it is only showing unmount option(all other options are grey) so how can i do it without losing any data

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marked as duplicate by psusi, karel, Lucio, Avinash Raj, Maythux Feb 12 '14 at 9:34

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you used LVM, then it will be "easy" (if you understand LVM). If you did not use LVM, it's dangerous because most "partioners" do not know anything about the data on your disk and they will just cut it in half as required to create your partitions. At least that's how it was before. Maybe gparted does a good job on that... – Alexis Wilke Feb 11 '14 at 19:00
is local volume manager is more effective than gparted in his job??? – user247166 Feb 11 '14 at 19:12
LVM knows how to handle existing data so it won't lose data (although it is somewhat complicated to use, but I think there is a GUI for it.) Either way, if you have data you do not want to lose, as mentioned by Rmano, you should back it up. – Alexis Wilke Feb 11 '14 at 19:18
LMV is not there on ubuntu software Center – user247166 Feb 11 '14 at 19:53
You normally decide to use LVM when you install your system. Retrofitting it is quite complex. See and (scroll down to find LVM). It is quite advanced material; it is not just a program you install. – Rmano Feb 11 '14 at 20:25

You can't repartition a partition which is in use. So

1) backup your data (1);

2) repartition your disk with gparted starting the system with a LiveUSB or LiveDVD (there is a gparted LiveCD somewhere around).

(1) In theory the resizing of a modern ext4 partition should be safe and without data loss. But when doing such kind of highly potentially disruptive operations, a backup is fundamental.(2)

(2) well... I have daily backup even when I do almost nothing. YMMV...

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is there any data loss or ubuntu os corruption during the whole process??? – user247166 Feb 11 '14 at 18:59
there may be 1 percent chance of data loss. – Avinash Raj Feb 11 '14 at 19:00
there is gparted software livecd is it able to do the job?? – user247166 Feb 11 '14 at 19:02
yes both the gparted live cd and ubuntu live cd will does the job. – Avinash Raj Feb 11 '14 at 19:07

You can resize your single HDD partition only through Gparted live disk or Ubuntu live disk.

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hey i have downloaded gparted live disk through mozilla...but it has been saved in root folder by that root folder is how can i access this?? – user247166 Feb 11 '14 at 19:08
post the output of sudo ls /root. – Avinash Raj Feb 11 '14 at 19:12
Desktop gparted-live-0.17.0-4-i486.iso – user247166 Feb 11 '14 at 19:15
saying that command not found.. – user247166 Feb 11 '14 at 19:19
sudo cp /root/gparted-live-0.17.0-4-i486.iso ~/Desktop – Avinash Raj Feb 11 '14 at 19:22

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