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Old 09-09-2016, 06:25 PM   #1
Widgeteye
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How to remove grub from mbr


I made the mistake of trying out Mint and it installed grub on my mbr, now I have installed Slack 14.2 but lilo won't overwrite grub and I can't boot except from the DVD install disk. Let me make it clear I want Lilo and not grub so there is no point in saying "use grub it's better." I have never in over 20 years had a problem with Lilo and I have had nothing BUT problems trying to use grub.

I have already tried to use DD to wipe the MBR off, I have tried several times running lilo but every time I reboot all I get is a grub error and I can't boot.

This error began after I installed Slack and I DID NOT run lilo during the installation, I was going to try and use grub instead and even though I did not run lilo upon installation of Slack, as soon as I rebooted grub errored out.

Any ideas?
Thanks
 
Old 09-09-2016, 06:33 PM   #2
STDOUBT
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What did your dd command look like?
AFAIK, you'd need to use something like
Code:
dd if=/dev/zero of=/dev/sda
as opposed to /dev/sda1 for example.
This method has never failed for me when attempting to remove malingering boot code.
The dd only needs to run for about 30 seconds.
EDIT!
________the above will be destructive and require a re-install. As for simply removing GRUB and using LILO while preserving your installation I have no idea :-(

Last edited by STDOUBT; 09-09-2016 at 06:35 PM.
 
Old 09-09-2016, 06:51 PM   #3
Widgeteye
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Quote:
Originally Posted by STDOUBT View Post
What did your dd command look like?
AFAIK, you'd need to use something like
Code:
dd if=/dev/zero of=/dev/sda
as opposed to /dev/sda1 for example.
This method has never failed for me when attempting to remove malingering boot code.
The dd only needs to run for about 30 seconds.
EDIT!
________the above will be destructive and require a re-install. As for simply removing GRUB and using LILO while preserving your installation I have no idea :-(
I used this "dd if=/dev/zero of=/dev/sda bs=446 count=1" The first 446 bytes is the Bootstrap.

Last edited by Widgeteye; 09-09-2016 at 06:53 PM.
 
Old 09-09-2016, 07:06 PM   #4
Skaendo
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Quote:
Originally Posted by Widgeteye View Post
I used this "dd if=/dev/zero of=/dev/sda bs=446 count=1" The first 446 bytes is the Bootstrap.
You could try
Code:
fdisk -w /dev/sda
or
fdisk --wipe /dev/sda
which should wipe out the partition table. You will then have to create a new partition table then partitions.

I had a similar problem, but I forgot how I fixed it.

Last edited by Skaendo; 09-09-2016 at 07:07 PM.
 
Old 09-09-2016, 09:29 PM   #5
yancek
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Have you logged in to a terminal as the root user and run liloconfig? You should see the same options you do with a Lilo install during the OS installation including the install to MBR option. What exactly happens? There should be no need to overwrite the Grub code as installing Lilo to the MBR will do that. If you've been using Lilo that long I expect you are familiar with the expert option?

Last edited by yancek; 09-09-2016 at 09:32 PM.
 
Old 09-10-2016, 01:01 AM   #6
syg00
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Uefi ?.
 
Old 09-10-2016, 06:05 AM   #7
ReaperX7
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LILO should install it's information to the mbr overwriting Grub's without incident, unless you were doing so from a non-root account.

Truth be told, Grub is a more feature-filled bootloader, but Mint is a strange distribution, and often they do things that don't make sense, but you should not be locked out of assigning the mbr.

The question I would ask is, when you ran liloconfig, did you install LILO to the superblock, mbr, or a bootdisk?
 
Old 09-10-2016, 09:23 AM   #8
Gordie
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I would try to delete grub from the boot directory /boot/grub/
Next, as root run liloconfig
 
Old 09-10-2016, 02:41 PM   #9
zk1234
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As root:
Code:
lilo -M /dev/sda
 
Old 09-10-2016, 05:53 PM   #10
Skaendo
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I remember what I did now, I used a live USB of GParted and wiped the partition table then made a new one. Worked great.

http://gparted.sourceforge.net/
 
  


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