The option to reuse existing disk partitions rather then
using the default HP XC default partitioning does not work
on all HP Integrity systems. The installation process looks for the /boot/efi partition to be in a fat16 format, but this
partition can be a fat32 format on some systems.
To work around this problem, install and boot
the node using the default HP XC partitioning scheme. Then,
after the system has booted, disable swap, unmount the partitions,
and adjust the partition sizes using the parted utility.