Error 15 at bootup

[pauhn]

My MBR became corrupted. I put in the install CD and ran the linux rescue to restore it grub-install etc... Now I get this error when I boot up:

Booting 'CentOS (2.6.18-194.el5xen)'

root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
kernel /boot/xen.gz-2.6. 18-194.el5

I was told that this could be because files were moved, or renamed? How do I solve this without doing a complete reinstall?

[yancek]

Is CentOS the only operating system?
Can you boot to rescue mode and get partition information with the fdisk command to post?
Do you have a separate boot partition?
Have you mounted your boot partition or directory to check to see if the appropriate files are there?

[pauhn]

Yes CentOS is the only OS.
I did not try to get partition information. Can you explain this? I do know that /boot lives on hda1.
I think I just answered that, /boot is on hda1
From what I can tell, I think everything is there.

I made a backup CD of my /boot directory and put it on a CD as a .iso How do I get the /boot.iso on my system to replace the one that's messed up?

[devils casper]

I made a backup CD of my /boot directory and put it on a CD as a .iso How do I get the /boot.iso on my system to replace the one that's messed up?

Which tool did you use to create .iso image? You can just extract .iso image and replace contents of /boot of Hard disk with extracted contents. You can use LiveCD or bootable USB to boot up system and replace contents.

[pauhn]

I just used mkisofs and burned it to a CD.

[pauhn]

Which tool did you use to create .iso image? You can just extract .iso image and replace contents of /boot of Hard disk with extracted contents. You can use LiveCD or bootable USB to boot up system and replace contents.

How would I use the LiveCD to replace /boot?

[pauhn]

bump for good measure?

[MikeTbob]

I think he was just saying to boot into the LiveCD and from there you can extract the iso to replace /boot. I think at this point unless you know what are doing, you should post the output of the fdisk command for all to see. You may not need to replace /boot yet. Just because your system is messed up does not mean that a backup of the /boot partition/directory is going to fix anything. Post the output of

fdisk -l

[atreyu]

to mount your boot.iso file, do (as root):

mkdir -p /mnt/iso
mount -o loop /path/to/boot.iso /mnt/iso

all files in the ISO file are now available (read-only) in the /mnt/iso directory.