To answer your question, no, we are not umounting before installing
grub, and yes, we are syncing after installing grub.
Here is the process that we are following to install grub.
It used to be a lot simpler, but we keep adding changes in an attempt to
resolve the problem we are seeing with the corrupt stage2 file.
For example, the extra "setup (hd0,0)" was added.
However unlikely, we even added the extra sleep at the end, in case
journaling was the issue.
After installing grub, the system is rebooted and it goes through the
natural shutdown process, including unmounting the disk.
#!/bin/sh
if [ -d /boot/grub -a -d /usr/local/lib/grub/i386-pc ] ; then
mv /boot/grub /boot/grub.old
mkdir -p /boot/grub
cp -f /usr/local/lib/grub/i386-pc/* /boot/grub/
cp -f /boot/grub.old/menu.lst /boot/grub/
/usr/local/sbin/grub-set-default 0
sync
else
echo "Can not find grub stage files and such that we need
for installing..."
fi
/usr/local/sbin/grub --batch --device-map=/boot/grub/device.map
--config-file=/boot/grub/menu.lst <<EOT
root (hd0,0)
setup (hd0,0)
setup (hd0)
quit
EOT
if [ -d /boot/grub.old ] ; then
rm -rf /boot/grub.old
fi
touch /tmp/.REBOOT
/bin/sync
# Wait for journaling on ext3.
sleep 6
exit 0
tracy kirk | senior firmware engineer
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