[ubuntu] Ubuntu 12.04 server - can't find guided partitioning?

view story

http://ubuntuforums.org – Hi everyone, I am really stuck here. When I installed Ubuntu 10.04.4 LTS 64 bits server, I was able to see the guided partitioning, etc. But when I was trying to install Ubuntu 12.04 LTS 64 bits server, I can't seem to find any option for guided. Either I chose active RAID1 or not, when comes to the partitioning screen, I could only see these options. Configure iSCSI volumes (no idea, ask to put in IP and port) Undo changes to partition (if click, purple screen forever) Finish partitioning and write changes to disk (can't click on this, as it will prompt some root issue) But in Ubuntu 10.0 (Hardware)