HP N4000 (rp7405/rp7410)

Quick Facts
Introduced	2002
Period	Decline (IV)
Series	Lettered/Integrity
CPU	2-8 64-bit PA-8700 PA-8800 PA-8000 650-1100 MHz
Caches	2.25-3 MB L1 0-64 MB L2
RAM	64 GB
Design	Cell
Drives	5 SCSI
Expansion	16 PCI
I/O	SCSI 1/3 serial Gigabit Ethernet Ethernet console

HP rp7405/rp7410 N4000 N-Class servers are up to 8-way multiprocessing servers which could be hardware-partitioned into logical servers, two nPartitions. Based on the same 10U rack chassis as rp7400/N4000, these newer rp7405 and rp7410 have a completely overhauled system and I/O architecture.

The Core Electronic Complex is a modified HP Superdome cell system architecture for two cells with each up to four processors, sixteen RAM slots and central chipset.

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

HP rp7405 N4000, A7111A, A7112A and A7113A, were introduced in 2002 for $50,959
HP rp7410 N4000, A6752A, were introduced in 2002 for $92,250

Architecture

Processors

rp7405 and rp7410 support two to eight processors, based on their system board, designated by the [-6X, -7X … -9X] suffix.

System		CPU	Speed	L1 cache	L2 cache
rp7405 A7111A	-6X -7X	1-2 PA-8700 PA-RISC 64-bit 1-2 PA-8700 PA-RISC 64-bit	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7405 A7112A	-6X -7X	1-4 PA-8700 PA-RISC 64-bit 1-4 PA-8700 PA-RISC 64-bit	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7405 A7113A	-6X -7X	1-8 PA-8700 PA-RISC 64-bit 1-8 PA-8700 PA-RISC 64-bit	650 MHz 750 MHz	768/1536 KB on-chip 768/1536 KB on-chip
rp7410 A6752A	-6X -7X -8X	2-8 PA-8700 PA-RISC 64-bit 2-8 PA-8700 PA-RISC 64-bit 2-8 PA-8700+ PA-RISC 64-bit	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-RISC 64-bit PA-8800 PA-RISC dual-core PA-8900 PA-RISC dual-core Itanium 2 VLIW (maybe)	875 MHz 1.0 GHz 1.1 GHz	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

HP Cell controller (CC), central chipset and crossbar, provides links for four processors, two memory banks, I/O via SBA, PDH and firmware, and second cell.
HP Master I/O controller (SBA) on I/O backplane on each cell, provides up to 32 links that connect to slave I/O controllers LBA.
Core I/O for I/O functions on two cards MP/SCSI and LAN/SCSI:
- Two dual-channel Symbios Logic 53C1010 Ultra160 SCSI controllers
- Dual-channel Symbios Logic 53C896 Ultra2-Wide SCSI-3 (MP/SCSI)
- Gigabit Ethernet networking (LAN/SCSI)
- Fast-Ethernet (DEC 21142/43) Management LAN (MP/SCSI)
- Optional second Core I/O card, for redundancy or partitioning
18 Elroy PCI bridges (LBAs) convert links/ropes from the SBA to PCI bus (only 9 of these 18 LBAs are used when only one cell board is installed)

N4000 rp7405/rp7410 System Architecture:

         CPU0 CPU1      CPU2 CPU3    CPU4 CPU5      CPU6 CPU7
           |   |          |   |        |   |          |   |
           |   | 4x2GB/s  |   |        |   | 4x2GB/s  |   |
           ====================        ====================
                    ||                          ||
                    || 8GB/s                    || 8GB/s
  |||||           __||__                      __||__           |||||
  |||||   4GB/s  |      |        8GB/s       |      |   4GB/s  |||||
  |||||==========|  CC  |====================|  CC  |==========|||||
  |||||          |______|                    |______|          |||||
  |||||             ||                          ||             |||||
  Memory            ||                          ||             Memory
                    || 2GB/s                    || 2GB/s
                    ||                          ||
                  __||__                      __||__
                 |      |                    |      |
                 | SBA  |                    | SBA  |
                 |______|                    |______|
                    ||                          ||
                    || 16x265MB/s               || 16x265MB/s
                    || (4.2GB/s)                || (4.2GB/s)
                    ||                          ||
  =================================  =======================================
  |   ||  ||  ||  ||  ||  ||  ||  | 
 265  || 530  ||  ||  ||  ||  ||  |         same as on left side
 MB/s || MB/s ||  ||  ||  ||  ||  | 
  |   ||  ||  ||  ||  ||  ||  ||  | 
  |   ||  ||  ||  ||  ||  ||  ||  |
 LBA  LBA LBA LBA LBA LBA LBA LBA LBA
  |   ||  ||  ||  ||  ||  ||  ||  |
 PCI  ||  ||  ||  ||  ||  ||  ||  |
 2x   ||  ||  ||  ||  ||  ||  ||  |
  |   ||  ||  ||  ||  ||  ||  ||  |
 Core ||  ||  ||  ||  ||  ||  ||  |
 I/O  PCI PCI PCI PCI PCI PCI PCI PCI
      4x  4x  4x  4x  4x  4x  4x  2x


   PCI slots/buses:
   PCI 4x -- PCI 64-bit/66MHz (533MB/s)
   PCI 2x -- PCI 64-bit/33MHz (266MB/s)

   LBA connections/downlinks:
   ||   two ropes -- 530MB/s
   |    one rope  -- 265MB/s

System buses

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
- 28 ropes link to 14 Twin-Turbo slots via 14 LBAs
- Two ropes link to two Turbo PCI slots via two LBAs
- Two ropes connect via two LBAs to Core I/O MP/SCSI cards
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

Expansion

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

I/O 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 Core I/O card set.

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

I/O ports

68-pin VHDCI Ultra160 LVD external SCSI external channel from LAN/SCSI board
Three serial RS232C DB9 local console, remote console, UPS via 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, the original HP Unix shipped with it
- HP-UX 11.00 (maybe), 64-bit (1997)
- HP-UX 11i v1, 64-bit (2000)
- 11i v2, 64-bit (2005)
- 11i v3, 64-bit (2007)

Benchmarks

System	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

Documentation

Manuals

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

↑ up