SP Switch function (MAP 0620)

Note: When unplugging the two ends of the suspect cable, check /var/adm/SPlogs/css/out.top to verify only two (2) ports were lost. If four (4) ports were lost, then two cables were swapped across that switch to switch connection. Connect the cables correctly and check /var/adm/SPlogs/css/out.top for any other errors.

2.If this is a switch-to-switchconnection, have customer update the switch configuration file appropriately (to show wrap plugs) before continuing:

v For code level 1.02 and higher, use the Etopology command.

3.Make sure processor nodes that were put in ªServiceº mode are returned to ªNormalº mode. Make sure all processor nodes are IPLed completely.

4.Have customer verify that the switch code is running on all processor nodes.

5.From the control workstation of the ªprimaryº processor node, typeEstart followed by ENTER.

6.Check /var/adm/SPlogs/css/out.top file for problems regarding the jacks indicated.

7.Does out.top file show a problem on any jacks indicated? v If yes:

a.Problem is in the SP Switch which is still reporting a problem.

b.Go to ªStep 0620-041º on page 1-35 to service or replace the switch assembly.

vIf no:

a.If this is a switch-to-switchconnection, remove both wrap plugs from the SP Switches.

b.Replace the frame-to-frame switch data cable that was disconnected before.

c.Go to ªStep 0620-043º on page 1-36 to verify fix.

Step 0620-024

Problem reported with all switch data cables from one or more frames. This may be caused by a clocking or grounding problem between frames.

Note: The ªmaster-clockº switch indicates the switch which is supplying the master clock for the systemÐthe master clock will have the clock input multiplexor set to ªinternal clockº (0). A ªproblemº switch indicates any switch which is experiencing problems.

1.Check the switch clock selections on the ªproblemº switches (refer to ªSelecting appropriate switch clocksº on page 3-6).

2.Do the clock settings on the ªproblemº SP Switches appear to be okay?

vIf yes, go to ªStep 0620-025º.

vIf no:

a.Change the clock selections on the appropriate switches (refer to ªSelecting appropriate switch clocksº on page 3-6).

b.Go to ªStep 0620-043º on page 1-36 to verify fix.

Step 0620-025

The clock settings on the ªproblemº SP Switches appear to be okay.

1.Is the problem switch in a frame with processor nodes?

v If yes, go to ªStep 0620-032º on page 1-32.

vIf no, go to ªStep 0620-026º.

Step 0620-026

Problem switch is in a switch frame (contains switches only, no processor nodes).

1.From Perspectives on the control workstation, open the Switch Front Panel window for this switch.

2.Check the clock selection to see if it is set to Internal or to one of the following external clocks: v For SP switch types: ªJack3º, ªJack4º, or ªJack5º.

3.Is the clock selection set to one of the External clocks?

1-30RS/6000 SP: SP Switch Service Guide

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IBM manual 30RS/6000 SP SP Switch Service Guide
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RS/6000 SP specifications

The IBM RS/6000 SP (Scalable Power) is a high-performance computing system that was developed in the early 1990s and has since become a significant player in the realm of supercomputing and enterprise solutions. Designed primarily for scientific, engineering, and complex data analysis tasks, the RS/6000 SP provides powerful processing capabilities, enhanced scalability, and features to support demanding applications.

One of the key characteristics of the RS/6000 SP is its modular architecture, which allows for the addition of multiple nodes. Each node is based on IBM's Power architecture, leveraging the RISC (Reduced Instruction Set Computing) design to achieve high throughput and efficiency. The system can support configurations ranging from a few nodes to hundreds, enabling organizations to scale their computational power as needed based on workload requirements.

The RS/6000 SP employs advanced interconnect technologies, most notably the SP Switch, which ensures high-speed communication between nodes. This interconnect allows for seamless data transfer, ensuring that the system can handle large datasets and complex computations without bottlenecks. The SP's ability to deliver concurrent processing capabilities makes it ideal for parallel computing tasks, including simulations, modeling, and large-scale computations.

In terms of software, the RS/6000 SP was equipped with AIX, IBM's version of the UNIX operating system, which provides a stable and secure environment for enterprise applications. Furthermore, the system supports a vast array of programming languages and tools, including Fortran, C, and C++, along with libraries and frameworks designed for high-performance computing. This compatibility allows developers to optimize their applications to fully utilize the underlying hardware.

Another notable feature of the RS/6000 SP is its extensive support for various workloads, including database management, multi-user applications, and graphical processing. The system was equipped with high-performance graphics capabilities, making it suitable for tasks that require intensive visualization, such as computer-aided design (CAD) and scientific visualization.

Overall, the IBM RS/6000 SP has solidified its role in the high-performance computing landscape, combining advanced technologies, robust scalability, and flexibility to meet the unique demands of research and enterprise environments. Its legacy continues to influence modern computing architectures, embodying IBM’s commitment to innovation and performance in the pursuit of complex problem-solving capabilities.
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