Restoring MBR

[ewh5243 at netscape.net]

>On Sun, 2 Jan 2005 00:02:02 -0500
>Bill Horne <bill at billhorne.homelinux.org> wrote:

>> Well, I started the New Year off with a bang: I fat-fingered a dd
>> command and I've overwritten the first 512 bytes of my mbr.
>> 
>> Before I dig out the backups, please tell me if it's possible to 
>> recreate the MBR from the information in the existing partition
>> labels, or if there's a backup of the partition table that I 
>> can use.

On Sun Jan 2 08:15:32 EST 2005 Jerry Feldman said:

> You can have GRUB or LILO rebuild your MBR. 
> Boot a rescue CD, a standalone Linux, or boot your installed 
> system from CD or floppy. 
> If you are using GRUB:
> If you are booting from a rescue:
>   mount your root file system and chroot it. 
>   mount your /boot if separate.
> Execute the grub shell. Here is an excerpt from the GRUB docs.
>
>  Once started, GRUB will show the command-line interface (*note
> Command-line interface::). First, set the GRUB's "root device"(1)
> (*note Installing GRUB natively-Footnote-1::) to the boot 
> directory, like this:
>
>     grub> root (hd0,0)

[snip]

Jerry,

Thanks for the tip: I tried to start GRUB from floppy, but when I enter
the "root" command, I get an error saying either that the partition 
doesn't exist or that the cylinder number is higher than the bios limit, 
depending on which partition I try.

Does GRUB have a way to rebuild the partition table?

TIA.

Bill Horne

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