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Old 04-01-2010, 03:44 PM   #1
Registered: Sep 2004
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GRUB2 - Failtrain Ride - Operating System Not Found

I just did a fresh very basic Debian Sid install on my "experimental" system (one hard drive with only a single partition), basic install meaning console only and just the following packages: ssh, mc, samba, elinks, sudo, and ClamAV.

After all the packages were installed, I ran apt-get dist-upgrade. This replaced GRUB 1.5 with GRUB 2. A reboot showed no problems, so I then gave the upgrade-from-grub-legacy command followed by the removal of the old unused /boot/grub/menu.lst just as the upgrade suggested.

A reboot now gives me:

GRUB Read Error
Operating system not found

What needs done to fix this? I have a System Rescue CD that I downloaded a couple days ago while learning about partimage. I am guessing there should be a way to use this to fix this problem, however, I have no idea what the procedures would be. From what I have seen of the new GRUB configurations, it does not look like the technique that was used to restore a 1.5 boot loader won't work with 2.0.

And once I get this fixed, is there anything I can do next time to prevent this from happening? This system I am working with is slated to be the demonstration subject for a series of Linux how to videos I am going to make (geared toward newcomers to Linux). So the procedures need to be reliable and smooth without getting bogged down in the editing of an infinite number of config files, etc. (that stuff is for a future installment).
Old 04-02-2010, 02:49 AM   #2
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Use this disc instead: Super Grub Disk. It makes repairing your grub easy and simple.
Old 04-02-2010, 11:43 PM   #3
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I'll check out that Super GRUB disk after the weekend. In the meantime, for troubleshooting purposes, I went ahead and wiped the drive and reinstalled the base system. Before doing the dist-upgrade, I rebooted with the System Restore CD and backed up everything with partimage.

After the dist-upgrade, GRUB2 was again installed, and the first reboot went fine. The problem definitely happens once the command upgrade-from-grub-legacy is issued, because again, I ended up with an unbootable system. Fortunately, I was able to restore from the aforementioned backup and am ready to try a dist-upgrade again. But before I do that, I just need to get some ideas as to why GRUB2 fails and what can be done preemptively to prevent this from happening.

Since this is for a how to video geared toward people who may be interested in either switching completely to Linux or at least learning to install and use Linux alongside other OSes, I need to make this as painless as possible, as having to delve into too many config files and complex commands could cause spontaneous cerebral detonation. So for now, I think I will advise two possibilities when it comes time to do the upgrade.

1: Show how to pin the GRUB Legacy package so it does not get replaced (yes, they will need to do some manual config stuff after all).
2: If they prefer to upgrade GRUB after all, advise against running the upgrade-from-grub-legacy command.

Sure, I would prefer not having to do either of these workarounds, but this project would be stalled indefinitely until a solution is found.
Old 04-08-2010, 03:25 AM   #4
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Maybe these can help to understand the new GRUB:

Old 02-21-2011, 03:14 PM   #5
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do you have grub> after error message?
Old 02-21-2011, 04:45 PM   #6
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apt-get install grub-pc
Old 02-21-2011, 05:29 PM   #7
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In which way do you install Sid? Whenever I install it, I have Grub2 out of the box, and it always works.


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