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Re: Grub Reinstall Problem!!!



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It would appear that on May 31, Peter Boy did say to Chiheb Djabri:

> If you have lost your grub by a windows install, you lost your MBR (the
> first boot sector on your harddisk). The content of your /boot partition
> is still in place.
> 
> To reinstall the mbr you have to perform
>     grub-install  /dev/hda
> 
> You should boot from the first Fedora CD in rescue mode, the program
> will found your Linux installation and mount it. It will give you some
> information how to make your installed root partition to your new root
> (chroot command). Check, that the /boot partition is mounted, too.

Hmmmn interesting... I too am new to grub (much more used to lilo) And
so since I hadn't yet found the time to learn this I was pleased to see
this info...

I have a couple of questions though.

With lilo, if I install it to mbr with "lilo -b /dev/hda"  I can also make
a back up boot floppy with "lilo -b /dev/fd0" without breaking the one
in /dev/hda... That is, I normally would get my lilo boot from the mbr of
/dev/hda. But if something trashes the mbr All I have to do is pop in the
lilo boot floppy and I can still boot any of my {undamaged} linux, and
probably my win98 & DrDos. I wouldn't need to fuss with the rescue mode
at all. I just rerun "lilo -b /dev/hda" And I'm done. (though I may have
had to "sys" the windows or DrDos partitions to make them bootable again
first...)

With grub, if I make a working boot floppy with "grub-install  /dev/fd0"
then the one I had in /dev/hda is broken (infinte loop of the word grub
being printed to the screen)  If I boot from the floppy and do a 
"grub-install  /dev/hda" The mbr can boot again, but now the grub floppy
boot is broke...

1) is it possible to install the same grub to start from the mbr OR from
a floppy depending on which bios finds first?

2) In case I must depend on the rescue mode sometime, Will it be able to
find the right linux installation on a system with 
FC2, FC1, MDK9.1, SuSE 7.3, Win98se, AND Dr Dos on it. Or would the
following partition tables confuse it

- -- 
|      ?           ?		
|			
|        -=-   -=-	 I'm NOT clueless...    	
|        <?>   <?>    	But I just don't know.  	
|            ^          Joe (theWordy) Philbrook           
|           ---  	     J(tWdy)P
|			  <jtwdyp ttlc net> 
|      ?           ?		



[root localhost jtwdyp]# fdisk -l /dev/hda /dev/hdc

Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         638     5124703+   c  W95 FAT32 (LBA)
/dev/hda2             639        1217     4650817+   f  W95 Ext'd (LBA)
/dev/hda3            1218        3162    15623212+  83  Linux
/dev/hda4            3163        4865    13679347+  83  Linux
/dev/hda5             639        1021     3076416    b  W95 FAT32
/dev/hda6            1022        1148     1020096   83  Linux
/dev/hda7            1149        1217      554211   82  Linux swap

Disk /dev/hdc: 61.4 GB, 61492838400 bytes
255 heads, 63 sectors/track, 7476 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdc1   *           1         261     2096451    6  FAT16
/dev/hdc2             262        3586    26708062+   5  Extended
/dev/hdc3            3587        5531    15623212+  83  Linux
/dev/hdc4            5532        7476    15623212+  83  Linux
/dev/hdc5             262         366      843381   83  Linux
/dev/hdc6             367         427      489951   83  Linux
/dev/hdc7             428         792     2931831   83  Linux
/dev/hdc8             793        1400     4883728+  83  Linux
/dev/hdc9            1401        1522      979933+  83  Linux
/dev/hdc10           1523        3470    15647278+  83  Linux
/dev/hdc11           3471        3586      931738+  82  Linux swap
[root localhost jtwdyp]#

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   # You can find my public gpg key at http://pgpkeys.mit.edu/  #
   ##############################################################

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