[NTLUG:Discuss] questions about intalling Grub and MBR

[terry]

You have 2 logical choices:

1) Have the bootloader write to MBR of each separate drive as you add
new drives and install new OS's on subsequent drives.  (Modern
computers have BIOS options to designate [any] drive to boot to, and
that's what you'll do to select which OS to boot [in this case].)

2) Overwrite sda's MBR  with new grub installation with each new
install and just keep including boot instructions for previous
installations.

Choice #2 is best / easiest but the choice is yours.