[CentOS] Problem after last update

[Dominik Składanowski]

2006/5/29, Johnny Hughes <mailing-lists at hughesjr.com>:
> > Since morning I have an emergency. After last kernel update one of my
> > servers didn't start. On display I see only "GRUB" :(
> > I have 2 more servers based on CentOS too, but after the same update
> > this servers works.
> >
> > All servers have 2 HDs and works as software mirror.
> >
> > I have started damaged machine using Knoppix and I can see partitions
> > and data on both disks. Of course I have made a backup.
> >
> > Anybody has the same problem? It can be hardware problem - HD diode
> > light all the time. Or maybe something went wrong during update?
> >
>
> It is very strange that grub (which was already installed and working)
> would go bad during an upgrade.
>
> I would boot from a CentOS-4.3 CD-1 and do this command at the isolinux
> prompt:
>
> linux rescue
>
> If it mounts the install at /mnt/sysimage ... do this:
>
> chroot /mnt/sysimage
>
> Then I would follow this guide to make sure that grub is installed on
> both hard drives and try rebooting:
>
>  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=114690
>
> (comment #7 should make you work ... assuming you have a software mirror
> using sda/sdb or hda/hdb)
>
> You may need to look at the file /boot/grub/Device.map to insure all the
> drives are listed properly.

Thanks for answer Johnny. It was exactly problem described above. I
have reinstalled grub using rescue evironment.

Thanks.
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