Technical data

Planning nPartition Configurations
nPartition Requirements and Recommendations
HP System Partitions Guide: Administration for nPartitions, rev 5.1 112
The PRI and HAA paths should be configured to reference disks that
are connected to different cells, if possible, with HAA being a mirror
of the root volume and PRI being the root volume. ALT should be the
path of a recovery or install device.
Under this configuration, if the cell to which the PRI disk is
connected fails or is otherwise inactive and the HAA disk’s cell is
available, the nPartition still can boot HP-UX.
Even if the PRI and HAA devices connect to the same cell (such as on
a multiple-partition HP rp8400 server), the HAA device can be used
to boot the nPartition to HP-UX should the PRI device fail.