I know there are quite a lot of other posts like these, but I really read all of them and I still couldn't solve my problem.
I recently got a dell with a 1TB hdd disk and a 32gb ssd disk (using RAID) installed with windows 8 and now I want to install ubuntu 13.04 in the hdd disk.
The problem is that it seems that ubuntu can`t recognize the partitions on the drive. When I start ubuntu installation, no partitions are shown: http://postimg.org/image/otkjg28ot/
And if I try to open Gparted I get the following error: http://postimg.org/image/q9w1y7blp/
And clicking in cancel, it recognizes the disk as an unallocated disk.
Any help would be really appreciated, thanks!