Can't swap between two bootable drives
I'm attempting to setup a 2-drive (sda, sdb) RAID 1 in my PC, using Raider to convert from my old single drive (sda) system to the new RAID 1.
From sda, on sdb I ran:
# raider -R1
# raider --run
and it finished ok setting up the empty drive into the RAID array and copied all data. Now I have to swap the disks, but I can't make my PC boot from sdb, it always boot from sda.
I've tried to modify the BIOS boot settings but nothing changed, I can only choose HD as boot device and change mount order, but not boot order between them.
I'm using Debian Squeeze and Grub as boot loader.
**EDITED**
Motherboard: ASROCK N68C-S UCC
HD: 2x 1Tb WD SATA2
Solved, to boot from second drive, in GRUB's command line: