Question : I kind of thought if you had 2 HDD's each with an OS that the bios would determine which would boot, just like when you have to put the DVD drive first in line for it to boot.
Apparently I was wrong?
@waynebob Kind of.. BIOS says skip all else and go look for something I can use.. Or go find something usable in this order..
Whether Windows or Linux there is a boot manager/boot loader. Grub is this boot manager of sorts. Depending on how many OS's or disks it will list all available OS's.
- You could have 4 OS's on 1 disk, BIOS doesn't care just wants to know where/which disk....
Grub says where on the disk to go find it - Win?? Linux Lite 1, LL 2, or LL3
Updating grub tell grub to scan the disks for an OS.. Then it will display them. -- Yes you could have multiple LL's running.