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I have a home server running Fedora 12 and decided to upgrade to Fedora 14. I ran through the upgrade process using preupgrade with instructions from here. I ran into an issue withi insufficient space n my /boot partition and followed the instructions from the troubleshooting section that allows the upgrade to download img files during the upgrade. The last I saw my machine, it was happily downloading the img file.

When I cam back a few hours later, I have a system that will no longer boot. I'm not a complete n00b, so I downloaded and booted from sysrescueCD.

It appears the /boot partition is still in place, and still has the Fedora 12 kernels; the grub menu.lst appears coherent (I've not looked at one before as I've used Slackware & lilo mostly).

Seems like trying to reload the MBR might make sense, but I'm at a loss as to how to troubleshoot and procede.

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I fixed it this way. I downloaded for Fedora 14 install media. I ran through the installation and told it to upgrade the existing install. I had it reconfigure the boot loader during install. All appears well

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Format the drive and re-install Fedora. That's what I would do. Re-sizing/creating or deleting partitions will prevent future problems.

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I have a fair amount of configuration in this installation that I'd rather not lose as yet. My data is safe, but not the config info – uSlackr Apr 21 '12 at 14:50
    
@uSlackr Ok then make the previous OS functional since you got the files. Then try to upgrade again. Using a live CD you can reload the MBR. – Kwang Apr 21 '12 at 15:01
    
exactly - its the how that eludes me... – uSlackr Apr 21 '12 at 15:47

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