[ubuntu] help raid setup and don t have valid partitions...

Hi!
I try install unbuntu 12.04 alt ver..to a raid 10 array...

I make 4 partitions on /dev/sda, and 4 similar to /dev/sdb...

sda1 500 mg /boot ext4
sda5 10gb / ext4
sda6 2gb swap
sda7 50gb /home ext4

I do the same for sdb...

after, i create Raid1 on the /boot sda1/sdb1
all the other partition is on raid 0....
i set a mont point for each of them and then format and install unbuntu...(whit the kubuntu setting...)

try to install grub /dev/sda /dev/sdb....and after that, i can enter ubuntu, but nothing want to run....exept the console....i ve sean grub installing only on sdb1.....and whit fdisk, it said that all the partition are not valid partition.....but i see /dev/md0 and the other raid partition create....but not valid....? can someone help me please, i tryng this for a week now and get a bit pistoff...but im new to configure whit terminal so.... i continu learning and try, but if someone want to help me just come :)):P