The SLES 11 sp2 autoyast install reboots more than once. Although edd=off can be added to the initial pxelinux kernel command line, this parameter is not forwarded to the intermediate boots before the final system bring up. On a certain Dell 12G PowerEdge servers the system will hang when probing EDD during these intermediate reboots. The following workaround allows an autoyast based install to complete in this situation:

<chroot-scripts config:type="list">
<notification>Appending kernel command line parameters ... </notification>
sed -e '/root=/s/$/ edd=off/' < /mnt/boot/grub/menu.lst > /tmp/menu.lst
cp /tmp/menu.lst /mnt/boot/grub/menu.lst