HP N4000 (rp7405/rp7410)

Quick Facts
Introduced	2002
Period	Decline (IV)
CPU	2-8 PA-8700/ 2-8 PA-8800/ 2-8 PA-8900 650-1100 MHz
Caches	2.25-3 MB L1 0-64 MB L2
RAM	64 GB
Design	Cell
Drives	5 SCSI
Expansion	16 PCI
Bandwidth	CPU 8-16 GB/s XBAR 8 GB/s Mem 4-8 GB/s XBAR-I/O 4 GB/s I/O 8.4 GB/s
I/O	SCSI 1/3 serial GigE 100E console

The HP rp7405/rp7410 N4000 N-Class servers are up to 8-way multiprocessing servers and at the time smallest HP system which could be hardware-partitioned into logical servers, two nPartitions. Based upon the same 10U rack-mountable chassis as their rp7400/N4000 brethren, the newer rp7405 and rp7410 are built around a completely overhauled system and I/O architecture. The Core Electronic Complex is a modified version of the Superdome’s cell-based system architecture, limited to two cells, which each contain up to four processors, sixteen memory slots and the central chipset.

The rp7405 was apparently an entry-level version of the rp7410 — based on the same hardware and with the same capabilities but shipped in smaller configurations. Upgrades to a full rp7410 were later possible, probably including a modified firmware for unlocking the full functionality.

Model	rp	Product	Introduced	Price
(N4000)	rp7405	A7111A A7112A A7113A	2002	$50,959
(N4000)	rp7410	A6752A	2002	$92,250

System architecture

Processors

The rp7405 and rp7410 support from two to eight processors, based on different system boards with different model numbers. Used processors are designated by the [-6X, -7X, …, -9X] suffix.

Model	Suffix	CPU	Speed	L1 Cache	L2 Cache
rp7405 A7111A	-6X -7X	1-2 PA-8700 1-2 PA-8700	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7405 A7112A	-6X -7X	1-4 PA-8700 1-4 PA-8700	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7405 A7113A	-6X -7X	1-8 PA-8700 1-8 PA-8700	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7410 A6752A	-6X -7X -8X	2-8 PA-8700 2-8 PA-8700 2-8 PA-8700+	650 MHz 750 MHz 875 MHz	768/1536 KB on-chip 768/1536 KB on-chip 768/1536 KB on-chip
Possible options (and/or upgradable):
	-8X -9X	PA-8700 PA-8800 (dual-core) PA-8900 (dual-core) Itanium 2	875 MHz 900 MHz-1.0 GHz 800 MHz-1.1 GHz possible	768/1536 KB on-chip 1.5/1.5 MB on-chip 1.5/1.5 MB on-chip	32 MB off-chip L2 64 MB off-chip L2

Chipset

Cell controller CC: the central chipset and crossbar. The CCs provide links for four processors, two memory banks, I/O via SBA, PDH and firmware, and second cell via the XBC.
Master I/O controller SBA: located on the I/O backplane, each is linked to one cell Each SBA provides up to 32 links that connect to slave I/O controllers LBA.
- 28 ropes link to 14 Twin-Turbo slots via 14 LBAs
- Two ropes link to two Turbo PCI slots via two LBAs
- Two links/ropes are connected via two LBAs to the Core I/O MP/SCSI cards
Core I/O for the I/O functions system with a set of cards: MP/SCSI and LAN/SCSI.
- Two dual-channel Symbios Logic 53C1010 Ultra160 SCSI controllers
- Dual-channel Symbios Logic 53C896 Ultra2-Wide SCSI-3 controller (MP/SCSI)
- Gigabit Ethernet networking (LAN/SCSI)
- Fast-Ethernet (DEC 21142/43) Management LAN (MP/SCSI)
- The optional second Core I/O card set can be used for redundancy or partitioning
18 Elroy PCI bridges (LBAs) convert the links/ropes from the SBA into PCI bus (only 9 of these 18 LBAs are used when only one cell board is installed)

» View a system-level illustration (ASCII) of the rp7405/rp7410 system/bus architecture.

System buses

Runway+/Runway DDR CPU bus, 125 MHz DDR, 64-bit, 2.0 GB/s per CPU, 16.0 GB/s max
Memory bus 4.0 GB/s for each cell, aggregate 8.0 GB/s max
XBC cell-to-cell link 8.0 GB/s aggregate
SBA cell-to-I/O link 2.0 GB/s on each cell, aggregate 4.0 GB/s max
32 I/O links/ropes, 12-bit wide, 265 MB/s, 8.5 GB/s I/O peak
14 PCI-64/66 I/O buses for expansion slots
Two PCI-64/33 I/O buses for expansion slots for Core I/O SCSI/LAN
Two PCI-64/33 I/O buses for Core I/O MP/SCSI
Two SCSI-3 Ultra160 LVD main storage I/O buses one on each cell
Ultra SCSI SE for removable media

Memory

ECC DIMMs, low-voltage TTL, 125 MHz frequency
256 MB, 512 MB and 1 GB modules supported
16 slots on each cell board
32 GB maximum, 64 GB with future memory modules

Expansion slots

There are up to 16 PCI 64-bit/66 MHz slots in the I/O cage, which can be fully accessed when using a system with two cells — with one cell board only seven slots are available. One PCI slot is dedicated to the Core I/O card set (see above) so only 15 of the 16 PCI slots are available for expansion options.

Storage

Four trays for low-profile 3.5″ Ultra2-Wide LVD SCSI hard drives with 80-pin SCA connector, hot-plug
One tray for a half-heigth 5.25″ 50-pin Ultra-Narrow SE SCSI drive, external accessible

External ports

68-pin VHDCI Ultra160 LVD external SCSI external channel from LAN/SCSI board
Three serial RS232C DB9 local console, remote console, UPS via a DB25 M cable on MP/SCSI board
10/100 Mbit Ethernet TP/RJ45 Management LAN on MP/SCSI board
Gigabit Ethernet TP/RJ45 on LAN/SCSI board

Operating systems

HP-UX: 64-bit (11.00,) 11i v1, 11i v2 and 11i v3

Benchmarks

Model	SPEC2000, int	SPEC2000, fp	SPEC2000 rate, int	SPEC2000 rate, fp
N4000-7X rp7410			4-CPU: 25.3 8-CPU:49.9	4-CPU: 18.9 8-CPU:36.8

References

Manuals

User Guide hp rp7405/7410 Servers (URL gone)
hp server rp7410 whitepaper (URL gone)

↑ up