Addition I/O resources
using the Server
Expansion Unit
(SEU)
Additional I/O resources can be obtained by adding the HP Server Expansion Unit 2 (SEU 2). The
SEU 2 is an add on chassis containing I/O resources that complement the I/O and partitioning
capabilities within the HP 9000 rp8440 Server. The SEU 2 mirrors the I/O resources embedded
within the HP 9000 rp8440 Server chassis, adding 16 I/O card slots, 4 disk bays, 2 removable
media slots, and enabling 2 additional hard partitions.
The SEU 2 must be installed in the same cabinet and directly above the host rp8440 server.
Please refer to the Server Expansion Unit 2 section in this guide or more specific details.
The following table summarizes the I/O configuration rules when an SEU 2 is configured with the
HP 9000 rp8440 Server.
Required Configuration
Minimum Required Number of Cells
Minimum Required Number of Core
I/Os
>16 I/O card slots
3 4
1
>24 I/O card slots
4 4
1
>4 Disks
3 4
1
>6 Disks
4 4
1
3 Removable Media
3 4
1
4 Removable Media
4 4
1
3 Hard Partitions
3 4
1
4 Hard Partitions
4 4
1
NOTE 1:
Two Core I/O cards are included in each SEU
AC/DC Power
DC Power Supplies
The HP 9000 rp8440 Server supports up to six hot swap bulk power supplies for 2N+1 protection.
The hot swap design allows for the replacement of a failed power supply without interrupting
server operation. Two supplies are included with the base system. A minimum of one additional
supply is required for each cell board. Following this rule, all configurations will have 2N+1 power
protection. HP rp8400/rp8420/rx8620 DC power supplies can be carried forward to the HP 9000
rp8440 server.
PCI Power Supplies
PCI power supply is now a redundant N+1 design. One PCI power supply failure will not affect the
I/O bay since the remaining PCI power supply will power both I/O bays (this is an upgrade from
the sx1000 based systems). PCI power supplies are hot swap capable (this is an upgrade from
the sx1000 based systems). HP rp8400/rp8420/rx8620 PCI power supplies cannot be carried
forward to the HP 9000 rp8440 server.
AC Power
The HP 9000 rp8440 Server contains four C20 power receptacle ports located at the bottom rear
bulkhead. A minimum of two power cords must be used to maintain normal operation of the HP
9000 rp8440 Server. A second set of two cords can be added to improve system availability by
protecting, for example, against power grid failures or accidentally tripped circuit breakers. The HP
9000 rp8440 Server hardware is capable of receiving AC input from two different AC power
sources. The objective is to maintain full equipment functionality when operating from power
source A and power source B, or A alone, or B alone. This capability is called "fault tolerant power
compliance."
Although many HP 9000 rp8440 Server configurations can be sufficiently powered from a single
16 /20 amp branch circuit, HP strongly recommends using one 16 amp (minimum) branch circuit
per power cord. Due to the variety of 16/20 plugs used throughout the world, the HP 9000 rp8440
Server menu offers a choice of plug options.
QuickSpecs
HP 9000 rp8440 Server
Configuration
DA - 12697 U.S. QuickSpecs — Version 4 — 3/3/2008
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