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can't replace windows 7 with ubuntu 12.04

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http://askubuntu.com – I have windows 7 and wanted top replace them with 12.04 but when I was booting and starting installation of ubuntu I chose replace windows in my ssd and it saw this problem. "/dev/sda contains GPT signatures, indicating that it has a GPT table. However,it does not have a valid fake msdos partition table, as it should. Perhaps it was corrupted-possibly by a program that doesn't understand GPT partition tables. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Is this a GPT partition table?" Even when I click yes or no it does not move on it seem like a no (HowTos)

Danial's picture
Submitted by Danial on 12/07/2012

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UEFI installation not booting 13 weeks 3 days ago

Ah, thanks srs5694.  I may not bother with EFI then.  Does this mean that I will need to use a MBR partition table though? As a partition set as bootable in a GPT partition table will be regarded as an EFI partition wouldn't it?

ryan117 https://bbs.archlinux.org/profile.php?id=68094

2013-02-19T10:45:53Z

I have an issue, not necessarily a problem. I have a disk, which had Ubuntu 11.04, a swap, a big NTFS and some free space. When 11.10 came out, I did a fresh install and recently I've deleted the 11.04 partition since I didn't needed it anymore. I've noticed that my partition table is a little bit messy.

3 OS's on same HDD 22 weeks 3 days ago

I've been all day around my laptop and just can't make it work,

I have one HDD 750 GB in size, and I would like to have the following partition table:

60 GB - Windows 7 150 GB - Windows 8 150 GB - Ubuntu 12.10 390 GB (Rest) - Logical drive for files

However for some reason (and I start by installing windows because I want grub for boot menu) it is not possible to begin the installation with t

I first noticed an issue when trying to install Linux Mint 14 as a third OS alongside Ubuntu 12.10 and Windows 7 - I was unable to create another partition to install Mint to.

Poking around, I realised that I had reached the limit of primary partitions: (from left to right of the table) 1) a ~100 MB primary partition that I meant to use for storing Grub files but never got down to, 2) a 25 GB ext

I'm questioning the possibility that I've deleted my partition table using:

dd if=/dev/zero of=/dev/sda1 bs=446 count=1

...trying to remove a grub that may or may not have been there.

I used a whole device as LVM physical partition, just so

sudo pvcreate /dev/xvdg

Unfortunately, while this was in use, I then accidentally overwrote some data (I think), by writing a new partition table:

sudo fdisk /dev/xvdg, add new partition, write partition table, delete partition, write empty partition table

This is where I am currently at.

I ran fdisk on the wrong HD. I basically cleared partition table, pressed w and quited fdisk and only then realized that that was my main harddrive...

I got this message:

WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table.