--- mage/branches/alx-0_6_0/profiles/alx-060/forced-uninstall	2011/09/01 10:15:46	2823
+++ mage/branches/alx-0_6_0/profiles/alx-060/forced-uninstall	2011/09/14 11:14:44	3200
@@ -4,6 +4,8 @@
 # get a suitable environment
 source /etc/profile
 
+PATH="/etc/mage-profile:${PATH}"
+
 MAGERC="/etc/mage.rc"
 MAGEPROFILE="alx-060"
 NEW_MAGE_DISTRIBUTION="unstable"
@@ -93,6 +95,55 @@
 	grub-install --no-floppy "${bootdisk}"
 }
 
+# checks size of the mbr, if we are able to install grub2
+check_mbr_size()
+{
+	local hdd="$1"
+	local geometry_sectors
+	local partition_start_sector
+	local retval
+
+	hdd="$(mount | grep '/dev/' | grep ' / ' | cut -d' ' -f1 | sed 's:\(.*\)[0-9].*:\1:')"
+
+	if [[ -z ${hdd} ]]
+	then
+		echo "check_mbr_size(): No hdd given, aborting"
+		return 1
+	fi
+
+	# fix permissions
+	chmod +x /etc/mage-profile/sfdisk > /dev/null
+
+	# default retval is 0
+	retval=0
+
+	# check only if disk size is below 256mb
+	if [[ $(sfdisk -s ${hdd}) -lt 257000 ]]
+	then
+		geometry_sectors=$(sfdisk -g ${hdd} | sed 's:.*,\ \([0-9].*\)\ sectors.*:\1:')
+		partition_start_sector=$(sfdisk -d /dev/hda | grep /dev/hda1 | sed -e 's:.*start=\(.*\), size.*:\1:' -e 's:\ ::g')
+
+		# check start_sector / geomtry > 1 then everything is fine, else abort setup as grub may not install!
+		if [[ $(expr ${partition_start_sector} / ${geometry_sectors}) -gt 1 ]]
+		then
+			echo "Current partition setup is big enough, to install grub2 mbr to this disk."
+			retval=0
+		else
+			echo "Warning: Current partition setup to small, cannot install grub2 boot-sector to this disk."
+			echo "Maybe this is a *RANGEE* with a flash-disk =<256MB. Please re-install this client."
+			echo "Upgrade *not* supported!"
+			retval=1
+			killall mage &> /dev/null
+			killall update-alx &> /dev/null
+		fi
+	else
+			echo "Current disk is big enough, to install grub2 mbr to this disk."
+			retval=0
+	fi
+
+	return "${retval}"
+}
+
 # fix mage.rc
 CONFIG="${MAGERC}"
 updateconfig RSYNC MIRRORS MAGE_DISTRIBUTION PACKAGES_SERVER_PATH MAGE_UNINSTALL_TIMEOUT
@@ -116,6 +167,8 @@
 	[[ -e /dev/${rootdev} ]] && ln -snf ${rootdev} /dev/root
 fi
 
+check_mbr_size || exit 1
+
 # update mage3 -> mage4
 if [[ -z $(magequery -n mage) ]]
 then