I had couple of old disks in my Freenas system that I replaced. I used Parted Magic to delete the two partition on each disk. I put one in a computer and booted the computer. Bios provided the following message "This is a FreeNAS data disk ad can not boot system. System halted." My question is how does bios knows that this was a FreeNAS disk? I thought by deleting the partitions all information is gone! TIA