On Sun, Nov 25, 2012 at 11:06:32AM -0800, Chuck Forsberg WA7KGX N2469R wrote:
...
>is it possible the BIOS is changing the drive order for some reason and
>you're not noticing?
I have Fedora 18 on sdf and Fedora 16 on sda.
Which version gets booted is a function of the boot order.
This allows me to fall back to Fedora 16 if needed.
If the BIOS boot order changes I get a different Version
of Linux when I boot.
BIOS order does not change by itself but how devices are enumerated
by a Linux kernel may change depending on what and from where you
booted. Check if /boot/grub2/device.map from both installations
are the same. Most likely they are not.
Anyway, why would update change the boot order to a drive
it *<HAS NOT>* written its bootloader to?
With a "wrong" device.map I would expect that you are not writing a
bootloader where you think you are writing but a boot order did not
really change. That would explain also crashes you previously mentioned
with XP. With multiple boot disks I would be very reluctant to allow
any "automatic" tools to do boot sector rewrites.
Michal