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Re: GRUB with IDE and SCSI disk



On Wed, 2006-03-22 at 23:29 -0500, Matthew Saltzman wrote:
> One of my systems has an IDE disk and a SCSI disk.  I upgraded the IDE 
> disk and I need to reinstall grub.  /boot is in /dev/sda1, but the system 
> boots off of /dev/hda.
> 
> I've tried various things to install GRUB on the new /dev/hda, but 
> everything results in a complaint during boot that
> 
> Error 21: Selected disk does not exist.
> 
> For example, in GRUB shell, I installed using:
> 
>  	> root (hd1,0)
>  	> setup (hd0)
> 
> The installation seems to work fine, but boot fails as above. I had this 
> working before, but for my life I can't recall how I did it differently 
> from this.
> 
> What am I missing?
> 
> Thanks.
> 

I assume your CD is IDE based, right?
Where is the root partition located? Boot is on the SCSI drive right?

You problem seems to be very simple: You BIOS is configured to boot from
SCSI; however, when you boot from a CD, the IDE devices get enumerated
first, sending the IDE drive to hd0,0

Gilboa


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