I am trying to autoyast an IBM OpenPower 520 system. When I autoyast the system without creating a PReP boot partition, the autoyast won't complete without error. I get the following error when it tries to install the boot loader.... ERROR: boot = /dev/null is not a valid block device When I create a PRep boot partition using the following in my autoyast file.... <partition> <format config:type="boolean">false</format> <partition_id config:type="integer">65</partition_id> <partition_type>primary</partition_type> <size>24M</size> </partition> The autoyast completes fine and I get a bootable system. However, when I do an fdisk on the booted system, the PReP Boot partition starts and ends on cylinder 1 and I get a message stating that "Partition 1 does not end on cylinder boundary". So I have a couple of questions... -Do I need to create this PReP Boot partition? If so, what is the correct configuration so to not get the cylinder boundary error? -If I must have it, how do I mount it after the fact so I can modify bootloader settings? -Can this partition be a FAT16 partition, and if so how do I create this, I tried using partiton_id 5 and 6 and my autoyast fails. Any help appreciated.