theaddicted

Completely Trashed Ubuntu (8.04)

In Ubuntu on May 9, 2008 at 3:58 pm

OK, I have been trying to put Ubuntu 8.04 onto my external hard disk (USB). So I plug it in, put in the CD, and go through the installation. After the installation I reboot and tell it to boot from my USB device, it works. I shut down and remove the hard disk, and boot up normally…only to discover GRUB error 21. It appears as though Ubuntu rewrote my MBR (Master Boot Record) onto the USB device, so I can only boot from the USB. What I had to do is reinstall Ubuntu, but before that, I had to pop in a Windows CD, go to the “Repair” sector, and enter the command:

fixmbr

It successfully rewrites the MBR, and I do a reboot, then reinstall Ubuntu. Everything works and my problem is solved.

Special thanks to my friend Logan for all the help, I appreciate it.

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  1. This approach actually has a disadvantage: you will be using the Windows boot loader, which is much less powerful than GRUB.

    Here is a better approach: install grub on you hard disk (not ubuntu, just the grub). add the entries for windows (on hd(0,0) ) and ubuntu ( on hd(x,y), depends on your machine).

    This way, you can boot from hard disk and still manage to boot the usb disk ubuntu by inserting the disk later..

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