HP 9000 rp8420 Server - User Service Guide, Fifth Edition

Figure 1-8 DIMM Slot Layout
Cells and nPartitions
An nPartition has one or more cells (containing processors and memory) that are assigned to the
nPartition for its exclusive use. Any I/O chassis that is attached to a cell belonging to an nPartition
also is assigned to the nPartition. Each I/O chassis has PCI card slots plus any I/O cards and
attached devices, and has a core I/O card assigned to the I/O chassis.
On the HP 9000 rp8420 server, each nPartition has its own dedicated portion of the server
hardware that can run a single instance of the operating system. Each nPartition can boot, reboot,
and operate independently of any other nPartitions and hardware within the same server complex.
The server complex includes all hardware within an nPartition server: all cabinets, cells, I/O
chassis, I/O devices and racks, management and interconnecting hardware, power supplies, and
fans.
One or more nPartitions may be configured within a server complex, allowing the hardware to
function as a single operating system or as many systems.
NOTE: Partition configuration information is available on the Web at http://docs.hp.com
Refer to HP System Partitions Guide: Administration for nPartitions for details.
Internal Disk Devices for the HP 9000 rp8420 server
As Figure 1-9 shows, in an HP 9000 rp8420 server cabinet the top internal disk drives connect to
cell 0 through the core I/O for cell 0. The bottom internal disk drives connect to cell 1 through
the core I/O for cell 1.
The upper removable media drive connects to cell 0 through the core I/O card for cell 0 and the
lower removable media drive connects to cell 1 through the core I/O card for cell 1.
28 Introduction