I'm rookie of ubuntu even linux. My disk topology as below
Now my boot in sda1 and can open OS during raid and sda only. my question is can I put boot in sdb1 and can open OS during raid and sdb only? I try copy all sda1 data to sdb1 via dd, but still can not open via sdb1, do I miss some step? or I just need to modify grub? If yes, how to modify?