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Re: Kernel update with yum



On Tue, 2006-05-30 at 20:13 -0500, Mikkel L. Ellertson wrote:
> David McCormick wrote:
> > I did find the problem and correct it, I had
> > added an IDE drive to a SCSI system and as soon as I removed it
> > everything worked as it has in the past 13 years that I have been using
> > Linux.
> > 
> > Thank you for your help.
> > 
> > Dave
> > 
> I am more used to seeing this problem with LILO then Grub. Depending
> on your BIOS and SCSI controller, the drive mapping can change when
> you add an IDE drive to a SCSI system. LILO used to always assume
> that BIOS device 80 was the IDE drive. (It is supposed to determine
> that at boot time now.) So if you booted from the SCSI drive, you
> had to tell LILO that the SCSI drive was BIOS 80. I have not used
> Grub on a SCSI/IDE mix, but I am sure there is a way to tell it to
> double check the drive mapping when you add an IDE drive.

I think grub makes the same assumption. Use the device.map file to get
grub to understand the BIOS ordering, e.g.:

# cat /boot/grub/device.map
(fd0)   /dev/fd0
(hd0)   /dev/sda
(hd1)   /dev/sdb
(hd2)   /dev/hdc

Paul.


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