[lug] Multi OS booting

[William Petty]

Well I have it running, but I had to resort to letting grub replace the boot 
sector
on the first SCSI disk.  I also had to do a repair of the Linux installation 
to reconfigure
it as being on the second drive. (It was originally installed on sda, its 
now on sdb)

If I ever boot with either SCSI drive missing, the bios remaps them and 
nothing
boots until I re-run setup and re-order the drives.
  Windows on sda (ID=0),
   Linux on sdb (ID=1)
   Data on hda (Mapped last)

So, I guess I am up and running, as long as all additional drives have 
higher IDs.
I can also see the Windows and Data partitions while in Linux which is what 
I
originally wanted .

Thanks for all of the suggestions. I just wish grub's boot sector (Stage1) 
had the
drive/partition info in plain text so it could be easily edited. That would 
have save
me two day's worth of futzing around!!

----- Original Message ----- 
From: "David L. Anselmi" <anselmi at anselmi.us>
To: "Boulder (Colorado) Linux Users Group -- General Mailing List" 
<lug at lug.boulder.co.us>
Sent: Sunday, November 20, 2005 9:05 PM
Subject: Re: [lug] Multi OS booting


> William Petty wrote:
>> If I stay "ALL" SCSI, I may go back to an old trick I used to do. I just
>> add a switch somewhere on the front panel and tie it to a higher ID 
>> jumper
>> on the lowest drive.  Flip the switch and the drive boot order reverses. 
>> Of course it gets ugly with lots of drives or SCA backplanes.
>
> All I've ever done is install Windows on the "first" drive/partition. 
> Linux doesn't care.  Sorry, I don't rearrange drives much but if that 
> makes Windows painful, just don't do it.  Make it first and leave it 
> alone.
>
> It doesn't really matter which loader you use.  I've let Windows run the 
> hda MBR and put LILO on a floppy's MBR.  No floppy, Windows boots and no 
> one knows Linux is on the box.  Put in the floppy and Linux boots.
>
> I don't see why booting Windows from GRUB would require drive hiding. 
> Sorry if I'm missing your point.
>
>> P.S. Have you ever reverted a machine from grub back to lilo?
>
> Yes, it's trivial.  Just remember that it's what's on the MBR that runs 
> when booting, that "lilo" writes LILO to the MBR, and that grub-install 
> writes GRUB to the MBR.  You might save yourself some headaches by 
> ignoring the partition boot sectors and only using the drive boot sectors 
> (i.e., install only to sda, never to sda1).  And if you can manage to keep 
> one drive "first" you only ever need to install to that boot record.
>
> Dave
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