Mailinglist Archive: opensuse-factory (581 mails)

[Joachim Reichelt <Joachim.Reichelt@xxxxxxxxxxxxxxxx>]

Am 02.12.2008 13:53, Jiri Srain schrieb:
> On Tuesday 02 of December 2008 13:28:03 Joachim Reichelt wrote:
>    
> > What about putting the bootloader on the second ... disk and using the
> > bios to select the drive to boot from?
> >      
>
> Then this disk becomes (from the BIOS point of view) the first disk.
>
> First disk means disk 0x80 (resp. (hd0) in the GRUB terminology). Actually
> this is why the detection cannot work reliably - you cannot say which disk
> will be bootable after you change the boot order from the one for
> installation to the one for running system.
>
> I will add some clarification to the page.
>
> Jiri
>
>    
The difficulty is, that e.g. opensuse writes the bootsector to the drive 
it assumes to be drive 0x80 and there is no easy way to
change it.
>    
> > Am 02.12.2008 13:24, Jiri Srain schrieb:
> >      
> > > On Monday 01 of December 2008 17:25:57 Carlos E. R. wrote:
> > >        
> > > > On Monday, 2008-12-01 at 16:06 +0100, Jiri Srain wrote:
> > > >          
> > > > > > I think this is the sum-up:
> > > > > >
> > > > > >     - If there is no separate /boot partition and / is xfs
> > > > > >        - grub is in MBR  -->   OK.
> > > > > >              
> > > > > Not really, see Josef's mail (and quotation of the documentation). It
> > > > > may work, but it may not. 1st stage needs to contain the block numbers
> > > > > of the filesystem driver, which may be a problem with XFS.
> > > > >            
> > > > Ah. I see...
> > > >
> > > >          
> > > > > The ones below which you marked as Bad cannot work at all. The OKs
> > > > > below shall work without any problems.
> > > > >            
> > > > Ok, then the table would be:
> > > >
> > > >       - If there is no separate /boot partition and / is xfs
> > > >          - grub is in MBR  -->   Bad (might work on ocassion)
> > > >          - grub is in /    -->   Bad.
> > > >       - If there is a separate /boot partition (recommended ext2)
> > > >         and / is xfs
> > > >            - grub is in MBR    -->   OK.
> > > >            - grub is in /boot  -->   OK.
> > > >            - grub is in /      -->   Bad.
> > > >       - If any non / partition is xfs (and thus, does not hold grub) -->
> > > > OK.
> > > >
> > > > I'll try to complete the table with the reasons later, time permitting.
> > > >          
> > > I've put on Wiki the list of scenarios which we internally discussed to
> > > support, you can get it at
> > >
> > > http://en.opensuse.org/Bootloader/Scenarios
> > >
> > > Any feedback and suggestions what is missing for the future is welcome.
> > >
> > > As stated in the document, if a scenario is not listed, it does not mean
> > > it cannot work - we just cannot guarantee that every possible scenario
> > > will work under any circumstances, which is the reason why this document
> > > was created.
> > >
> > > At the moment, only x86_64, i386 and IA64 (resp. GRUB and ELILO) are
> > > described in the wiki.
> > >
> > > Jiri
> > >        
>
>
>
>    

--
Joachim
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