[Wylug-help] Grub, dual boot query

[Don Magee]

Mike Goodman wrote:
> And you all thought this one had gone away! Seriously, though, I've now 
> tried the same thing, adding IDE1 to IDE0 where IDE0 has FC2 and tried 
> loading FC4 on IDE1. Similar results to when trying to install FC4 on 
> the W98SE box. So I swapped and made the HDD with FC2 on the slave and 
> installed FC4 on the master. I now have a system which sees only hda on 
> booting, as before, but this one holds FC4. I added "(hd1)   /dev/hdb"  
> to /boot/grub/device.map and now need to change /boot/grub/grub.conf. 
> Herewith what /boot/grub/grub.conf on hd0 contains, then 
> /boot/grub/grub.conf on hd1. Can anyone suggest how I should amalgamate 
> them? If we name them grub1 and grub2 respectively, exactly which lines 
> of grub2 should I add to grub1?
> 
> # grub.conf generated by anaconda
> #
> # Note that you do not have to rerun grub after making changes to this file
> # NOTICE:  You have a /boot partition.  This means that
> #          all kernel and initrd paths are relative to /boot/, eg.
> #          root (hd0,0)
> #          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
> #          initrd /initrd-version.img
> #boot=/dev/hda
> default=0
> timeout=5
> splashimage=(hd0,0)/grub/splash.xpm.gz
> hiddenmenu
> title Fedora Core (2.6.11-1.1369_FC4)
>        root (hd0,0)
>        kernel /vmlinuz-2.6.11-1.1369_FC4 ro 
> root=/dev/VolGroup00/LogVol00 rhgb quiet
>        initrd /initrd-2.6.11-1.1369_FC4.img
>


  title Fedora Core (2.6.10-1.770_FC2)
  root (hd1,0)
  kernel /vmlinuz-2.6.10-1.770_FC2 ro root=/dev/hdb1 rhgb quiet
  initrd /initrd-2.6.10-1.770_FC2.img



I think that the above should boot FC2 from the first partition of the 
slave drive.

If you want to experiment with the grub.conf entry you can type in all 
the variants with different titles and try to boot them from the menu to 
see what works.

The definitive grub guide can be downloaded at:

http://www.gnu.org/software/grub/manual/


Don Magee



> is the hda=hd0 content and hdb=hd1 has:
> 
> # grub.conf generated by anaconda
> #
> # Note that you do not have to rerun grub after making changes to this file
> # NOTICE:  You have a /boot partition.  This means that
> #          all kernel and initrd paths are relative to /boot/, eg.
> #          root (hd0,0)
> #          kernel /vmlinuz-version ro root=/dev/hda2
> #          initrd /initrd-version.img
> #boot=/dev/hda                            //this is what it says, 
> although it is now hdb - should I change it on hdb, too?
> default=0
> timeout=10                                                                             
> //leave off up to here?
> splashimage=(hd0,0)/grub/splash.xpm.gz                              //do 
> I need this and/or the next line?
> password --md5 **********?encrypted-boot-loader-password?***********
> title Fedora Core (2.6.10-1.770_FC2)
>        root (hd0,0)                            //simply change to root 
> (hd1,0) ?
>        kernel /vmlinuz-2.6.10-1.770_FC2 ro root=LABEL=/1 rhgb quiet
>        initrd /initrd-2.6.10-1.770_FC2.img
> title Fedora Core (2.6.10-1.12_FC2)
>        root (hd0,0)                             //leave this and 
> subsequent blocks off?
>        kernel /vmlinuz-2.6.10-1.12_FC2 ro root=LABEL=/1 rhgb quiet
>        initrd /initrd-2.6.10-1.12_FC2.img
> (plus four more similar blocks, one added each time yum update was run)
> 
> Then I'll have another go at the W98SE box!
> 
> Best regards,
> 
> Mike Goodman
> 
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