Novell LINUX ENTERPRISE SERVER 10 SP2 - INSTALLATION AND ADMINISTRATION Installation Manual page 441

GRUB Reports GRUB Geom Error
GRUB checks the geometry of connected hard disks when the system is booted.
Sometimes, the BIOS returns inconsistent information and GRUB reports a GRUB
Geom Error. If this is the case, use LILO or update the BIOS. Detailed information
about the installation, configuration, and maintenance of LILO is available in the
Support Database under the keyword LILO.
GRUB also returns this error message if Linux was installed on an additional hard
disk that is not registered in the BIOS. stage1 of the boot loader is found and
loaded correctly, but stage2 is not found. This problem can be remedied by regis-
tering the new hard disk in the BIOS.
System Containing IDE and SCSI Hard Disks Does Not Boot
During the installation, YaST may have incorrectly determined the boot sequence
of the hard disks. For example, GRUB may regard /dev/hda as hd0 and /dev/
sda as hd1, although the boot sequence in the BIOS is reversed (SCSI before
IDE).
In this case, correct the hard disks during the boot process with the help of the
GRUB command line. After the system has booted, edit device.map to apply
the new mapping permanently. Then check the GRUB device names in the files
/boot/grub/menu.lst and /boot/grub/device.map and reinstall the
boot loader with the following command:
grub --batch < /etc/grub.conf
Booting Windows from the Second Hard Disk
Some operating systems, such as Windows, can only boot from the first hard disk.
If such an operating system is installed on a hard disk other than the first hard disk,
you can effect a logical change for the respective menu entry.
...
title windows
map (hd0) (hd1)
map (hd1) (hd0)
chainloader(hd1,0)+1
...
In this example, Windows is started from the second hard disk. For this purpose,
the logical order of the hard disks is changed with map. This change does not affect
The Boot Loader 423