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I've formatted the disk and installed Windows 7 on a pre-installed Windows 8. (UEFI - disabled secure boot) When I try to install Ubuntu from a live CD, it cant recognize my HDD partitions, not even trying to allocate a partition on ext4, NTFS in GParted live and on windows disc manager. Ubuntu simply can't see the HDD partitions nor the installation of windows, I tried to do something with fixparts but don't know exactly what to do. Here i put a screenshot. my partitions Edit: Here I list my partitions:

ubuntu@ubuntu:~$ sudo lsblk -f

NAME FSTYPE LABEL MOUNTPOINT

sda

├─sda1 ntfs Reservado pelo Sistema

├─sda2 ntfs

└─sda3 ext4

sdb
└─sdb1 vfat /cdrom

sr0
loop0 squashfs /rofs

ubuntu@ubuntu:~$ sudo lsblk -l

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 465.8G 0 disk

sda1 8:1 0 100M 0 part

sda2 8:2 0 97.6G 0 part

sda3 8:3 0 368.1G 0 part

sdb 8:16 0 3.7G 0 disk

sdb1 8:17 0 3.7G 0 part /cdrom

sr0 11:0 1 1024M 0 rom

loop0 7:0 0 962.1M 1 loop /rofs

Ubuntu's Gparted give me a warning when opened:

/dev/sda contains GPT signatures indicating that it has a GPT table. However, it has a fake msdos partition table as it should. Perhaps it was corrupted? Is this a GPT partition table?

Dennis
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  • Please start the Ubuntu live system and provide the output of `sudo lsblk -f` and `sudo fdisk -l`. A screenshot of GParted might help too. If your hard drive(s) aren't listed there at all, provide the output of `sudo dmesg`. You can copy and paste command output on the terminal. Please [edit] your question, if you want to add information. Especially file or program output [listings](/editing-help#code) (with the help of the `{}` button in the editor toolbar) are much more readable there and overall it's best to have everything relevant in one place. – David Foerster Nov 03 '15 at 15:33
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    Possible duplicate of [Problems Installing Ubuntu 13.10 Alongside Windows 7 - gpart shows unallocated space](http://askubuntu.com/questions/376607/problems-installing-ubuntu-13-10-alongside-windows-7-gpart-shows-unallocated-s) – Rod Smith Nov 05 '15 at 01:28

1 Answers1

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Make sure to boot the LiveCD in no-EFI mode, since you've installed Windows in legacy mode.

Execute sudo gdisk /dev/sda and try converting to MBR and then rewriting the partion table under Recovery/transformation options.

Gayan Weerakutti
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  • Solved! Thank you! Now Im going to test the boot. – Dennis Nov 05 '15 at 12:35
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    I've got new problems with the boot, updated grub and it doesn't worked to enter windows. I rebooted and recovered windows with the boot disk, and finally it worked! Thanks a lot! – Dennis Nov 05 '15 at 13:28