Environment Yellow, Flashing, Power Green

Switch description and problem determination (MAP 0590)

There are two LEDs on the front of each SP Switch. For quick reference, their definitions are as follows:

Environment (Yellow)

Off No environmental problems detected by switch supervisor card.

On Warning of environmental condition out of nominal range. Preventative Maintenance should be scheduled for this switch.

Flashing

Serious environmental condition detected; power shut off.

Power (Green)

Off No 48 V dc power available at the SP Switch.

Flashing

Power available at the SP Switch, but switch logic is Off.

On Power available at the SP Switch, and logic is On.

Note: Refer to ªService position proceduresº on page 3-9 for placing or removing the SP Switch into or from service position.

Step 0590-001

Read the following warning and then follow steps to ensure continuity of customer's jobs in the queue.

Attention: Servicing a processor node or SP Switch will interrupt customer usage of the processor node and the remainder of the switch network. If the switch feature must be replaced in a multi-frame system, refer to ªRemoving and restoring switch resourcesº on page 3-7, for information on isolating the SP Switch.

Attention: It is possible that the customer has modified switch cabling from standard configurations; therefore, be careful about relying on node and frame information. Any connector jack numbers will be correct regardless of the customer's cable configuration, so you may trace the cabling from the jack number if necessary.

1.Have customer complete all active parallel jobs or jobs using switch interface (for example, tape B/U ADSM), then remove the switch feature from the active configuration. Refer to ªRemoving and restoring switch resourcesº on page 3-7,for these procedures.

2.Check for system monitor errors indicating environmental problems with the switch feature. These can be viewed by issuing the appropriate command from the control workstation:

v errpt -a-N sphwlog pg (For SSP code levels 1.02 and higher)

vRefer to the ″Starting a service call (MAP 0100)″ in RS/6000 SP: System Service Guide for more information on the pg command

Note: In a frame with processor nodes, entries for the switch will refer to ªnode17º or ªslot17º. In a multi-switch frame, switches will be listed as even slot addresses.

3.Determine the SP Switch type (see page 1-1)

4.Refer to Table 1-1 on page 1-4for a prioritized list of conditions. Find the first condition that describes your problem, then perform the associated action.

Chapter 1. Maintenance Analysis Procedures (MAPs) 1-3

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.