Re: Booting alternative kernels from primary disk?
Re: Booting alternative kernels from primary disk?
- Subject: Re: Booting alternative kernels from primary disk?
- From: Jean-Pierre Mouilleseaux <email@hidden>
- Date: Sat, 18 Jan 2003 15:09:45 -0500
"Before you install the new kernel, make a copy of your original
kernel. When things fail you can always copy the original kernel back
by booting from a different disk or partition. Either X or 9 will
work." (from xnu building for mortals - circa 10.1.1)
I am rather speechless. This seems like a rather obsolete suggestion
for machines that ship with solely OSX now.
Is there no such way to boot from the backup kernel you made from the
primary disk?. I only have X, I don't have 9. I also only have one
Mac. Do I need to keep the original install cd's on hand whenever I am
in the mood to dabble?
i wrote a simple script to safely swap out kernel builds that might be
mildly helpful. to the best of my knowledge, the script only works on
ppc machines -- i am unsure how darwin x86 handles its nvram variables
(or more specifically boot-device). if madness ensues and the machine
fails to boot, you can zap the pram (command-option-p-r) to restore the
default boot-device settings. while i have not managed to mess up my
boot driver, do keep in mind what josh said about booting off another
partition or cd to restore the driver.
kswap:
<
http://opendarwin.org/~jpm/naughty/darwin/kswap.sh>
hope this helps.
cheers,
jean-pierre
_______________________________________________
darwin-kernel mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/darwin-kernel
Do not post admin requests to the list. They will be ignored.