On Mon, Mar 2, 2015 at 4:33 PM, Bob Goodwin <bobgoodwin(a)wildblue.net> wrote:
Yes, I find the boot menu convenient, this computer has several
drives with
different systems and I just select what I want when I boot it. I'll try it
tomorrow and see what I bought, mainly for the price!
OS installations are made BIOS or UEFI at the time of installation. So
if you have a bunch of legacy OS's that were installed on a BIOS
system, then you'll probably find it much easier to use a "legacy
BIOS" or "disable UEFI" (very badly named) option. This enables a
compatibility support module to present a faux-BIOS to the legacy OS,
and sometimes this presents performance limitations and the only way
to find out is to test the system separately with UEFI native and
CSM-BIOS booting.
If all kernels are relatively recent (approximately version 3.3 or
newer), then it's possible for the Fedora 21 grub2-efi package to
support booting all of these legacy OS's in native UEFI mode. The key
factor is if the kernel has EFISTUB enabled at the time it was built.
I think GRUB also has a command that allows enabling the CSM-BIOS per
boot. So that might be another way around this. But now we're deep in
multiboot weeds...
--
Chris Murphy