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<H1>[Mageia-discuss] can bootable partitions be detected during installation?</H1>
<B>Wolfgang Bornath</B>
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TITLE="[Mageia-discuss] can bootable partitions be detected during installation?">molch.b at googlemail.com
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<I>Fri May 4 11:08:05 CEST 2012</I>
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<PRE>2012/5/4 blind Pete <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">0123peter at gmail.com</A>>:
><i> Wolfgang Bornath wrote:
</I>><i>
</I>>><i> 2012/5/3 blind Pete <0123peter-
</I>><i> <A HREF="https://www.mageia.org/mailman/listinfo/mageia-discuss">Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org</A>>:
</I>>>><i>
</I>>>>><i> But at which moment/occasion would you need that?
</I>>>><i> When do you use the installer?
</I>>>><i> Incompetent user: every month.
</I>>>><i> Tester: every week.
</I>>>><i> Mageia user: every nine months.
</I>>><i>
</I>>><i> No, I meant: at which moment in the install process and for which
</I>>><i> occasion?
</I>><i>
</I>><i> During a standard install at the start of the configuration section
</I>><i> there is a point where there is a message about
</I>><i> "PREPARING BOOTLOADER" please be patient, searching for other
</I>><i> systems, this may take a while, or somthing similar.  Then the
</I>><i> Summary pops up.
</I>><i>
</I>><i> It could be done before that, immediately after partitioning.
</I>><i> Perhaps if the advanced button were pressed?
</I>><i>
</I>>>>><i> Only once when
</I>>>>><i> you install the distribution which you think will stay the longest
</I>><i> and
</I>>>>><i> whos bootloader will go into MBR. After that you don't need it any
</I>>>>><i> more because you will have to add new distributions manually to the
</I>>>>><i> list.
</I>>>><i> You can use drakboot as it is now to add "things to be chainloaded"
</I>>>><i> to the list.
</I>>><i>
</I>>><i> But that makes only sense for the bootloader which is in the MBR. So
</I>>><i> you do it once and never again.
</I>>><i> Whenever you add a distribution, you put the bootloader of this new
</I>>><i> one in its root partition. Then you boot the distribution which has
</I>>><i> its bootloader in the MBR and add the relevant 3 lines into its
</I>>><i> menu.lst. You can't use drakboot for that.
</I>><i>
</I>><i> It would make most sense to start with a bootloader in the MBR
</I>><i> then go to a root partition bootloader and finaly an operating Lystem,
</I>><i> but LiLo and GRUB let you go "up" a level back to the MBR's
</I>><i> bootloader, or "sideways".  e.g. From /dev/sda to /dev/sda12
</I>><i> to /dev/sda1 to /dev/sda to /dev/sda2 to an OS.  It can even
</I>><i> loop to itself, pointless but it works.
</I>><i>
</I>><i> If you want to do things like that, then you need to be
</I>><i> very careful about how you label things.
</I>><i>
</I>><i> Do different things get listed in Mageia's bootloader config
</I>><i> depending on whether it is written to the MBR or the root
</I>><i> partition?  Find everything if going to MBR, only list Mageia
</I>><i> stuff (and "back") if going to the root partition?
</I>><i>
</I>><i> BTW I was assuming that every distribution has its own tools.
</I>><i> If your "master" installation is Mageia (or even if it is not)
</I>><i> you can use drakboot to add chainloader commands to Mageia's
</I>><i> GRUB or LiLo configuration.
</I>
Well, if you say so, I'm not sure I fully understand what you
described. Of course I never looked for such an occasion because my
"steering distribution" (the one with the bootloader in MBR) is a
small one without X and without any applications except for vim as
editor (old version of grml, below 100MB) and a few commandline tools
so it can also serve as a rescue system.
So when I install Mageia after that I go to the summary in the
installer, configure the bootloader to sit in the root partition of
Mageia. Then at reboot I boot grml, add the 3 matching lines for the
Mageia installation to the menu.lst and that's all. Likewise I can do
with all following installations. I've been doing it for years this
way.
Of course this is not really something for a totally new user, OTOH a
totally new user does not have several different distributions on his
machine. But even such a user will be able to follow instructions (in
the German mandrivauser.de wiki we have a step-by-step HowTo for
that).
--
wobo
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