Redirect Grub or copy new boot

Paul Howarth paul at city-fan.org
Sat Mar 12 11:41:28 UTC 2005


On Sat, 2005-03-12 at 20:24 +0900, Mark Sargent wrote:
> Paul Howarth wrote:
> 
> >On Sat, 2005-03-12 at 16:24 +0900, Mark Sargent wrote:
> >  
> >
> >>Hi All,
> >>
> >>after not finding any solution for my previous FC2 install(couldn't load 
> >>X system), I went ahead and did a fresh install of FC3 on to another 
> >>partition. I didn't create another boot partition, as I was thinking I 
> >>could either redirect grub to the boot dir for the new install or copy 
> >>the dir/files onto the existing boot partition. Which way would you 
> >>do/have done it..? Cheers.
> >>
> >>new install = /dev/hda5
> >>boot partition = /dev/hda9
> >>old install = /dev/hda12
> >>    
> >>
> >
> >I usually install with multiple partitions/logical volumes anyway.
> >
> >I assume that your entire new installation went into /dev/hda5 and you
> >didn't tell the installer to re-use the existing /boot partition
> >in /dev/hda9?
> >
> >You can configure your existing FC2 grub to chain-load the FC3 grub
> >from /dev/hda5, or you could copy the grub.conf kernel entries from your
> >FC3 install into your FC2 grub.conf. I would do the former rather than
> >the latter, because the latter would require you to repeat the operation
> >every time you upgraded the FC3 kernel.
> >
> >If you post the output of "fdisk -l /dev/hda" and your FC2 grub.conf
> >file, you might get more specific help.
> >
> >Paul.
> >  
> >
> Hi All,
> 
> here is what was asked for. FC2 grub.conf and fdisk output,
> 
> Grub:
> # 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 (hd0,9)
> #          kernel /vmlinuz-version ro root=/dev/hda11
> #          initrd /initrd-version.img
> #boot=/dev/hda
> default=0
> timeout=10
> splashimage=(hd0,8)/grub/splash.xpm.gz
> password --md5 $1$zVCW8EN2$ZVsfDdJMJGmcxb/qge15k0
> title Fedora Core (2.6.10-1.14_FC2)
>     root (hd0,8)
>     kernel /vmlinuz-2.6.10-1.14_FC2 ro root=LABEL=/ rhgb quiet
>     initrd /initrd-2.6.10-1.14_FC2.img
> title Fedora Core (2.6.10-1.12_FC2)
>     root (hd0,8)
>     kernel /vmlinuz-2.6.10-1.12_FC2 ro root=LABEL=/ rhgb quiet
>     initrd /initrd-2.6.10-1.12_FC2.img
> title Fedora Core (2.6.9-1.11_FC2)
>     root (hd0,8)
>     kernel /vmlinuz-2.6.9-1.11_FC2 ro root=/dev/hda12 rhgb quiet
>     initrd /initrd-2.6.9-1.11_FC2.img
> title Fedora Core (2.6.9-1.6_FC2)
>     root (hd0,8)
>     kernel /vmlinuz-2.6.9-1.6_FC2 ro root=/dev/hda12 rhgb quiet
>     initrd /initrd-2.6.9-1.6_FC2.img
> title Fedora Core (2.6.5-1.358)
>     root (hd0,8)
>     kernel /vmlinuz-2.6.5-1.358 ro root=/dev/hda12 rhgb quiet
>     initrd /initrd-2.6.5-1.358.img
> title Windows
>     rootnoverify (hd0,0)
>     chainloader +1

My, what a lot of kernels you still have!

> FDisk:
> Disk /dev/hda: 45.0 GB, 45020602368 bytes
> 255 heads, 63 sectors/track, 5473 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/hda1   *           1         510     4096543+   b  W95 FAT32
> /dev/hda2             511        5473    39865297+   f  W95 Ext'd (LBA)
> /dev/hda5   *         511        1020     4096543+   7  HPFS/NTFS
> /dev/hda6            1021        2138     8980303+   b  W95 FAT32
> /dev/hda7            2139        3688    12450343+   7  HPFS/NTFS
> /dev/hda8            3689        3943     2048256    b  W95 FAT32
> /dev/hda9            3944        3956      104391   83  Linux
> /dev/hda10           3957        4086     1044193+  82  Linux swap
> /dev/hda11           4087        4596     4096543+   b  W95 FAT32
> /dev/hda12           4709        5473     6144831   83  Linux
> 
> Paul, I also tried to point grub to the partition like below, but, it 
> generated errors,
> 
> root (hd0,4)
> filesystem type unknown, partition type 0x7
> 
> setup (hd0)
> Error 17: Cannot mount selected partition

Didn't you install grub in /dev/hda5 during your FC3 install? If so, why
are you trying to reinstall grub?

> Don't un this, as I can mount the partition under the old install like so,
> 
> mount -t ext3 /dev/hda5 /mnt/hda5
> 
> And, I also don' un why it shows as HPFS/NTFS when I formatted as ext3.

The partition type entries in the partition table don't have to
accurately represent the filesystems those partitions are formatted
with, but it causes some confusion (e.g. for grub) when they don't. You
can use fdisk ("t" command) to fix the partition types. Did you delete a
4GB NTFS partition and use the space to install FC3?

If you installed grub in the root partition (/dev/hda5, not the MBR)
during your FC3 install, you should already have grub installed in
(hd0,4) and the following addition to your FC2 grub.conf should be
sufficient to run it:

title Fedora Core 3
    rootnoverify (hd0,4)
    chainloader +1

Paul.
-- 
Paul Howarth <paul at city-fan.org>




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