Restoring grub on MBR
w.mess at freenet.de
Mon Sep 22 09:50:40 PDT 2008
randhir phagura wrote:
> Wolfgang wrote on 22 Sep 08:
>> Hi Randhir,
>> that is correct that you cannot boot if the MBR is gone or corrupt. But
>> in this case you need only a bootable medium e.g. LFS live CD/DVD and
>> then you can repair the MBR with dd command.
>> Another alternative is if you have a discete drive to write the MBR to a
>> discete with dd.
> Hi Wolfgang,
> That is very good. I have checked and seen that your first command does, in fact, copy the MBR on to the file: /boot/mbr_$TS.
> However, I am not very clear whether, it will copy the file back to MBR from within the 'Live LFS CD/DVD', without first chrooting into your linux installed on /dev/hda. I shall try it next time when I have a similar mishap.
> Have not understood "Another alternative is if you have a discete drive to write the MBR to a discete with dd." Do you mean a disket?
> Anyway thanks a lot for the responses. It is a pleasure to converse with you!
yes I mean a disket and floppy drive. I have yesterday seen from chapter
dd if=/boot/grub/stage1 of=/dev/fd0 bs=512 count=1
dd if=/boot/grub/stage2 of=/dev/fd0 bs=512 seek=1
may be helpful as well. You can give it a try as well.
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