Installation and Partitions

[javirk]

Hi, yesterday I decided to install Ubuntu 13.04 in my computer. I downloaded it and burned it into a CD. Installation started properly, but, when it got to the partitions part (I have windows 8 installed and I want dual boot), it says me I have no other OS. And if I have a look at what it tells me my partitions are, it says me I have 500Gb of empty space (the whole space of my HDD). I went to GParted with the LiveCD, but it says me the same. ANd also I have done this:

gdisk /dev/sda

Which I found here (http://www.linuxbsdos.com/2013/02/26/zap-gpt-data-structures-from-a-disk-while-preserving-existing-mbr-partitions/). But it answers me as follows:

Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.

Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged

************************************************** **************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
************************************************** **************************

Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.

So I don't know what to do, If you could help me I'd be really grateful.

Bye!

[TheFu]

Read up on Win8 UEFI and Ubuntu. I hope you didn't change anything. There are some mandatory pre-install steps.
Search for "UEFI Ubuntu" with your favorite search engine - something from *.ubuntu.com should come up. Read that page carefully.

Old guys like me are avoiding UEFI another few years. Thanks for being a beta tester!

[javirk]

Hi, I have both UEFI boot and FastStartup disabled. So I'm not sure if that's the problem, because the CD starts properly and I can use the LiveCD with no problem...

Thank you for answering!

[oldfred]

This will cause issues. Any partition type error and many partition tools fail. And this seems to be a common problem with not easy solution. Not use if sgdisk lets you modify last partitions end or not.


Warning! Secondary partition table overlaps the last partition by
33 blocks!
You will need to delete this partition or resize it in another utility.



This is by the author of gdisk on same issue.
http://askubuntu.com/questions/15037...n-overlaps-gpt (http://askubuntu.com/questions/150378/how-to-fix-mbr-partition-prior-to-ubuntu-installation-a-partition-overlaps-gpt) repair gpt:
http://www.rodsbooks.com/gdisk/repairing.html
(http://www.rodsbooks.com/gdisk/repairing.html)http://ubuntuforums.org/showthread.php?t=2179942
last partition overlaps backup partition table
http://ubuntuforums.org/showthread.php?t=1956173