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David1357 12-07-2007 07:25 AM


Originally Posted by dgermann (Post 2982728)
Those entries you quote are on the new drive, sda, and it had the boot flag removed. When Grub came up, it showed only the Grub entries from sdb.

I am confused about which drive you are currently trying to boot from.

Whichever drive you are trying to boot, the partition with "/boot" on it must have the "bootable" flag turned on.

Once you have that sorted out, you should mount the file system you want to boot from (e.g. using System Rescue CD or equivalent) and run

# grub-install --root-directory=/mnt/system --recheck /dev/sdX
where "/mnt/system" is replaced by where you mount the file system, and "X" is replaced by the letter of the drive you are trying to boot from.

This will re-install GRUB, and hopefully fix the "Error 15" problem.

dgermann 12-12-2007 10:01 PM


Thank you for your very prompt and helpful reply. Wish I had been as prompt in getting back to you. I have been busy working till too late at night to feel safe in tackling this again. I apologize to you for taking so long.

Now re-installing grub makes a lot of sense to me. Sounds like it ought to work, but after this saga, who knows?

I am more confused than you, for sure! But in any case, I want to boot from sdb1 (the old drive); but as of the moment I am only able to boot from sda1 (the new drive).

Will try your idea (hopefully soon) and report back.

Thank you, thank you very much, David1357!

dgermann 01-12-2008 06:42 PM


Thank you all who responded to my plea for help. I really appreciate the quick and authoritative help I got here, and always get here!

Since all is working fine at the moment, I have decided to leave well enough alone. My present plan is that sometime in May I will probably install the new release of Ubuntu and at that time install it to the sdb drive, perhaps even switching the boot order. That should give me what I want and may be a lot less painful than continuing on this path

This thread will be my resource for doing that work.

Thank you all, very, very much. You are life savers and grand people!

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