I've been trying for a couple of days now to get Ubuntu 10.10 installed on a RAID 5 setup. I have 3 1TB drives so I also need Ubuntu to boot off of one of those drives. From what I've been able to find on the forums I need to set one of the drives to have a RAID 1 partition that I can use for /boot but I have no idea how to do that(something about using Gparted?). I'm farily new at this so a step-by-step would be awesome but I'll take any help I can get.
You do not need to create a /boot partition anymore. You do need to use the alternate/text mode installer. At the partitioning step, create a partition on each disk and set its usage to raid, then create the raid array and assign it to be used for the root ( / ).
I finally resolve the software RAID-5 issue on the DELL R310.
The article just mislead us https://help.ubuntu.com/community/Installation/SoftwareRAID
Workaround Steps for software RAID-5
Done, hope you get over of it!!