OpenPA.net

HP A400, A500 (rp2400, A-Class)

Quick Facts
Introduced 2000, 2002
CPU 1-2
PA-8500/
PA-8600
PA-8700
440-750 MHz
Cache 1.5-2.25 MB L1
RAM 2-8 GB
Design Astro
Drives 2 SCSI
Expansion 2-4 PCI
Bandwidth System 1.9 GB/s
I/O 1.3 GB/s (A400)
I/O 1.9 GB/s (A500)
Mem 1.9 GB/s
I/O 100E
2 SCSI
1/3 serial
10E console

Overview

The HP A-Class servers rp2400/rp2430 (A400), rp2405 and rp2450/rp2470 (A500) are the early 2000s 64-bit successors of the popular HP 9000/A180 rack servers. Still being part of the HP 9000 800 series, the A-Class were renamed under the rp server badge with several iterations of rp24x0 designators. The A400 was single-processor while the A500 was SMP-capable and had better expandability. The rp2405 was a low-cost version, introduced two years later based on similar hardware to the A500 that could be upgraded to a rp2470.

System design is based on 64-bit PA-RISC processors with large on-chip L1 caches, Astro memory/CPU controller and Elroy PCI bridges for expansion and I/O, a similar but simplified architecture of the HP Visualize C3000 line of workstations.

The various A-Class model names with CPU-suffix correspond to these rp-designators:

Internals

CPU

The A400 servers are uniprocessor while the A500 support up to 2-way SMP, based on different system boards they support different types of processors (it's all rather complicated):

Model Part-No CPU Processor options
A400/rp2400 A6109A, A6109B 1 -44: PA-8500 440 MHz with 512/1024 KB on-chip I/D L1 cache
A400/rp2430 A6890A 1 -5X: PA-8600 550 MHz with 512/1024 KB on-chip I/D L1 cache
-6X: PA-8700 650 MHz with 768/1536 KB on-chip I/D L1 cache
rp2405 A7121A 1 -6X: PA-8700 650 MHz with 768/1536 KB on-chip I/D L1 cache
A500/rp2450 A5570A, A5570B, A8329A 1-2 -44: PA-8500 440 MHz with 512/1024 KB on-chip I/D L1 cache
-5X: PA-8600 550 MHz with 512/1024 KB on-chip I/D L1 cache
A500/rp2470 A6890A 1-2 -6X: PA-8700 650 MHz with 768/1536 KB on-chip I/D L1 cache
-7X: PA-8700 750 MHz with 768/1536 KB on-chip I/D L1 cache
rp2405 A7122A 1-2 -6X: PA-8700 650 MHz with 768/1536 KB on-chip I/D L1 cache

The following configuration might have been shipped, or maybe were only theoretically possible:

Chipset

Buses

Memory

Expansion

Drives

External connectors

References

Manuals

Website

Operating systems

Benchmarks

Model SPEC2000, int SPEC2000, fp SPEC2000
rate, int
SPEC2000
rate, fp
A500-5X
(rp2450)
422 414 2-CPU: 9.3 2-CPU: 7.6
A500-7X
(rp2470)
581 6.74
2-CPU: 12.9

Compare these with other results on the Benchmarks page.

Dimensions

↑ up