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I need to create an additional partition on an external harddrive where ubuntu is installed. is there any way i can do this without affecting ubuntu.Its 1Tb and ubuntu and my files only takes 30gb of it. I need an extra partition atleast 400gb. Gparted not allowing me to do that since ubuntu is on the same partition I can connect this external harddrive to another pc but scared if it affects Ubuntu

bergdi
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  • possible duplicate of [How to resize partitions?](http://askubuntu.com/questions/126153/how-to-resize-partitions) – psusi Apr 15 '15 at 02:09

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If you boot a LiveCD or LiveUSB, you can make sure all partitions on the hdd are unmounted and resize to your needs.

Hellreaver
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Back up your data since repartitioning can result in data loss.

You can't chance an active partition and the partition mounted at / can't be unmounted in a running system. That's why you can't do your intended operation.

Ubuntu provides the so-called "Start Disk Creator" which you can use to put a live system on a USB stick. It needs to be formatted with FAT32.

If you have another computer with a Linux system and GParted on it, you can use it instead, so you don't have to create a live medium. The only important thing is that the partitions aren't mounted.

UTF-8
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  • thank you..both of you..one last question. the other pc is windows 8. is there a partition manager that could see linux partitions or should i just go with the liveCD as Hellreaver said – bergdi Apr 14 '15 at 20:08
  • If the partitions are recognized as what format they really are, it *should* be no problem. If they are recognized as "unkown", it's critical. If they are recognized as unallocated space, don't do anything with that program. Generally speaking, partitioning with Windows is a very bad idea. – UTF-8 Apr 14 '15 at 20:46