I used to have a RAID 0 setup but I ditched it and restarted from scratch with a plain non raid single disk system. The second disk is just used for general storage.
Well today, I boot the machine and for whatever reason the BIOS booted from the secondary drive which still had the old RAID 0 boot record and OS and everything. Took me a few minutes to figure out what went wrong, I changed the boot order in my BIOS and my 'new' machine came back.
How do I blow away the bootability of the old secondary drive without destroying any of the partitions on it? The MBR has the partition table so I can't just blow it away, but I can't find any partition tool that will erase the MBR while keeping the partition table.
This is a ubuntu 10.10 setup.