How to format hard drive without functional OS

Question

I was previously dual booting Ubuntu and Windows but by mistake I have deleted a partition. I don't know which one but neither OS is getting loaded.

It is stuck at this scene:

Error:unknown file system  
Entering rescue mode....  
Grub rescue>_

How to format my hard drive so that I can reinstall those OS again?

possible duplicate of [How do I install Ubuntu?](http://askubuntu.com/questions/6328/how-do-i-install-ubuntu) — , Jul 24 '15 at 14:31
I have VTCed as duplicate as you will just need to do a fresh install from a LiveUSB. — , Jul 24 '15 at 14:32
@ParanoidPanda I have inserted the cd but the system is not recognising it — agha rehan abbas, Jul 24 '15 at 14:36
The screen says error unknown file system entering rescue mode grub rescue>_ — agha rehan abbas, Jul 24 '15 at 14:38

score 0 · Accepted Answer · edited Apr 13 '17 at 12:23

0

Go in your BIOS and change boot order to boot first CD-rom (or bootable USB stick)
How do I install Ubuntu?

edited Apr 13 '17 at 12:23

Community

1

answered Jul 24 '15 at 15:09

miharix

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9

score 0 · Answer 2 · answered Jul 24 '15 at 17:27

Both Ubuntu and Windows installation applications offer you the option to format hard drive using built in formatting tools, just burn your CD/DVD with installation image of your choice or create installation USB. During the installation process choose to format hard drive.

How to format hard drive without functional OS

2 Answers2