Just mount the drive and use that path for the #2 stuff.
for exmple in #1 make a /mnt/new_rtl and mount the new drive there.
than make a lilo.conf file that uses /mnt/new_rtl/boot/vmlinux as
a kernel path and set the root partition correctly. This should
make it posible to boot both versions.
boot in #2 and mount the old stuff under /mnt/rtl_old and make a
lilo.conf
with that path (basicly the otherway around as before).
Only thing stays you have to boot from the MBR from one drive probably
the
one you boot from now. But when you until you put that to
rest that shouldn't be a porblem.
- Erwin
"Dresner, Norman A." wrote:
>
> I need to set up a computer which can support two very different
> RTL-versions on two very different kernels.
> 1) RTL-0.9J on 2.0.36 (basically RedHat 5.2)
> 2) RTL v3 on 2.2.x (basically RedHat 6.2) (probably x=18)
>
> Currently I have #1 installed. I'd like to install #2 on a second disk so I
> can eventually make it the primary and retire #1. Because of the
> significant differences between the two kernels, the libraries, and the
> applications programs for the two kernels/versions, I don't think that just
> having two different kernels available to choose from will work.
>
> What I really want is to be able to choose which OS to boot at the LILO
> prompt, but I believe that this may not be possible. I was looking at both
> my /etc/lilo.conf and the lilo user documentation and saw that the drive
> from which to boot is a "global" parameter.
>
> If 'boot' is global, then the only way to switch between these two OS is to
> boot whichever happens to be installed, and see which one it is. If it's
> the one I want, I'm set; if not, I have to run lilo to install a new map
> which specifies that the other drive is the boot drive and then reboot
> again. While this can work, it's certainly not convenient.
>
> Which finally brings me to the question: If you support multiple versions
> of RTL, how do you engineer the switching between them?
>
> Thanks
>
> Norman Dresner
> Fellow Systems Engineer & SGI Laboratory Administrator
> Radar Systems Engineering Department
> Electronic Systems and Sensors Segment
> Northrop Grumman Corporation
> Baltimore-Washington International Airport
> 7323 Aviation Boulevard
> Baltimore Maryland 21240
>
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