After upgrade from 7.1 to 7.3 unable to boot from hard, only from floppy. I have grub installed in /dev/hda - first disk
Also i have /dev/sda(1,5,7) 1-root and /dev/sdb
When booting it says "Error loading operation system"
Now (from floppy) I am running normal kernel, not smp but i have a smp machine.
How can I make grub (or lilo) to boot without problems
Please, help it is a very important server

Why don't you boot off the floppy and reinstall lilo or grub.

E.g.

/sbin/lilo

Should install lilo

Don't know how to do it in grub

/sbin/grub maybe?

Boot into linux with the floppy and check your /boot/grub/menu.lst or /boot/grub/grub.conf file to make sure that it contains the correct information about your system. Then run as root grub-install /dev/hda.

Already done it, but doesn't works

What does grub.conf look like now?

what kernel is running when you boot from floppy?

what kernel were you running before?

is it still in /boot?

Is smp compiled into the new kernel?

grub.conf
default=0
timeout=10
splashimage=(hd1,0)/boot/grub/splash.xpm.gz
title Red Hat Linux (2.4.18-3smp)
root (hd1,0)
kernel /boot/vmlinuz-2.4.18-3smp ro root=/dev/sda1
initrd /boot/initrd-2.4.18-3smp.img
title Red Hat Linux-up (2.4.18-3)
root (hd1,0)
kernel /boot/vmlinuz-2.4.18-3 ro root=/dev/sda1
initrd /boot/initrd-2.4.18-3.img

From floppy 2.4.18-3
Previuos was 2.4.4-2 - it's not important(it also wont boot without floppy)
yes it is in /boot
Redhat has a compiled kernel with smp

I think it is not a boot loader problem, maybe it is a bios one, but not sure

Try booting into linux with your boot disk and then run the command grub as root. Then run:

root (hd1,0)
setup (hd0)
quit

Then try rebooting.

the same thing. I just don't know what to do. It also unpleasant, that it is a production server, so I can't experiment with booting for a long time. I already tried a lot of different ways. When I install lilo to /dev/sda it prints only "LI".

Before the upgrade, were you able to boot into red hat 7.1 with grub?

After upgrading to red hat 7.3 and reinstalling grub, were you able to get the grub splashimage?

Do you have a separate /boot partition?

Did you add any hard drives?

1. RedHat 7.1 had no grub, lilo was my boot manager
2. yes
3. no
4. I just add a news scsi drive /dev/sdb as hot pluggable

Since you had lilo working before, let's see if we can get it going.

When you upgraded to 7.3, a new System.map file may have been placed in the /boot folder. See if you can find it. It might look like this: System-2.4.18-3.map. The old map file is probably named map. You can check the map= line in the /etc/lilo.conf file to find out the name. It's also possible that map is a symbolic link to the real map file.

If there is a map file, you can rename it. Then create a symbolic link to the new System.map file and name the symbolic link map.

Then make sure all the entries in lilo.conf are correct and run /sbin/lilo. Reboot.

I solved a problem! Just made my IDE drive first, then install lilo there with map=/boot/map. Anyway, thanks everyone

You're welcome.
Glad you got it working!