Re: Can't restore Red Hat Ent V3 from tape

From: Dave (laporte1_at_charter.net)
Date: 09/11/04 

Date: 11 Sep 2004 03:59:09 -0700

Jean-David Beyer <jdbeyer@exit109.com> wrote in message news:<10k3nrqdcjlrg84@corp.supernews.com>...
> Dave wrote:
> > Could someone help me, I am having trouble restoring a full system
> > backup tape which contained a good "bru" archive of my full and updated
> > Operating system from / down. I had Red Hat Enterprise V3 installed
> > and about 3 months of updates, which included several updates to the
> > kernel that I had noticed the kupdate program downloading and
> > installing. My latest kernel on the system was vmlinuz-2.4.21-20.EL.
> > My /etc/grub.conf stated the following after the updates.
>
> It needs a little bit more (see below).
> >
> > kernel = /vmlinuz-2.4.21-20.EL Root=LABEL=/ initrd
> > /inird-2.4.21-20.EL.img
> >
> > kernel = /vmlinuz-2.4.21-15.0.4.EL ro Root=LABEL/ initrd
> > /initrd-2.4.21-15.0.4.EL.img
> >
> > kernel = /mvlinuz-2.4.21-15.EL ro Root=LABEL/ initrd
> > /initrd-2.4.21-15.EL.img
> >
> > After I restore the full system backup tape and reboot, the system just
> > boots to a black screen with the work "GRUB" and a flashing cursor. The
> > system is totally unresponsive to any keyboard keys. I am guessing
> > after restoring the tape backup the GRUB program can't locate the now
> > restored boot image that probably is in a new area on the HD. I have
> > played around with running the command #grubby
> > --update-kernel=/boot/vmlinuz-2.4.21-20-.EL to see if it would update
> > any/or all necessary entries to find the kernel on boot, but again
> > after the fifth time of reloading everything and rebooting the system
> > just comes back to a black screen with the word "GRUB".
> >
> >
> > Any help to this problem would be greatly appreciated.
> >
> > Please feel free to email me at "laporte1@charter.net"
> >
> >
> > Thanks
> >
> > Dave LaPorte.
>
> Did you actually use CRU? It is supposed to restore absolutely everything,
> partition table, /dev/, and all, by using two floppies and the backup tape.
>
> Is /boot and /boot/grub correct? Sounds like grup is being called and it
> cannot find the stuff in /boot/grub.
>
> My /boot/grub looks like this:
>
> ]$ ls -l /boot/grub
> total 187
> -rw-r--r-- 1 root root 82 Mar 2 2004 device.map
> -rw-r--r-- 1 root root 7840 Mar 2 2004 e2fs_stage1_5
> -rw-r--r-- 1 root root 7536 Mar 2 2004 fat_stage1_5
> -rw-r--r-- 1 root root 6880 Mar 2 2004 ffs_stage1_5
> -rw------- 1 root root 881 Sep 8 00:42 grub.conf
> -rw------- 1 root root 905 Aug 4 01:22 grub.conf.dist
> -rw------- 1 root root 905 Aug 4 01:12 grub.conf~
> -rw-r--r-- 1 root root 8448 Mar 2 2004 jfs_stage1_5
> lrwxrwxrwx 1 root root 11 Mar 2 2004 menu.lst ->
> ./grub.conf
> -rw-r--r-- 1 root root 7040 Mar 2 2004 minix_stage1_5
> -rw-r--r-- 1 root root 9408 Mar 2 2004 reiserfs_stage1_5
> -rw-r--r-- 1 root root 11182 Sep 11 2003 splash.xpm.gz
> -rw-r--r-- 1 root root 512 Mar 2 2004 stage1
> -rw-r--r-- 1 root root 106364 Mar 2 2004 stage2
> -rw-r--r-- 1 root root 6528 Mar 2 2004 vstafs_stage1_5
> -rw-r--r-- 1 root root 9320 Mar 2 2004 xfs_stage1_5
>
>
> trillian:root[/boot/grub]# cat grub.conf
> # 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/hda3
> # initrd /initrd-version.img
> #boot=/dev/hda
> default=0
> timeout=15
> splashimage=(hd0,0)/grub/splash.xpm.gz
> title Red Hat Enterprise Linux ES (2.4.21-20.ELsmp)
> root (hd0,0)
> kernel /vmlinuz-2.4.21-20.ELsmp ro root=LABEL=/
> initrd /initrd-2.4.21-20.ELsmp.img
> title Red Hat Enterprise Linux ES (2.4.21-20.EL)
> root (hd0,0)
> kernel /vmlinuz-2.4.21-20.EL ro root=LABEL=/
> initrd /initrd-2.4.21-20.EL.img
> title Red Hat Enterprise Linux ES (2.4.21-15.0.4.ELsmp)
> root (hd0,0)
> kernel /vmlinuz-2.4.21-15.0.4.ELsmp ro root=LABEL=/
> initrd /initrd-2.4.21-15.0.4.ELsmp.img

***********************************************************
Jean-David Beyer:

     I Didn't use CRU I used a tape software package called "BRU"
which
is supposed to back everything during a full system backup. When I
restore
I "telinit s" to single user mode and then I restore using the brue
command #bru -xvua. The -ua means overwrite all files. I have used
this process
on older redhat versions and it worked. The only other thing I did to
insure
the system booted after the tape restore was to run the 'lilo' command
to
reset the kernel info.
     In regard to the /boot and /boot/grub the only thing I have been
checking
is the /boot directory to make sure the the file vmlinuz-2.4.21-20.EL
and the
file initrd-2.4.21-20.ELsmp.img were actually there and they were. I
didn't
even know to check the /boot/grub. I will try again and compare the
files to
what you posted.
     Also, I did check the /etc/grub.conf. It was there and it
looked similar to what you had other then my vmlinux files were
numbered

vmlinuz-2.4.21-20.EL
vmlinuz-2.4.21-15.0.4.EL
vmlinuz-2.4.21-15.0.4.EL

     Before I restored the system the only entry in /etc/grub.conf was
for the kernel build vmlinuz-2.4.21-15.0.4.EL. I assumed that was
because my tape backup was of a system with several Red Hat updates.

Thanks

Dave.

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