Came accross same problem on a Dell 2950 with Perc RAID controller. Have done a number of tests and I am unable to get Ubuntu Dapper to boot from discs on the RAID-controller on this machine.
-- Grub - Error 21 returned https://launchpad.net/bugs/8978 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
