IBM RS/6000 SP manual Step

Page 55

SP Switch function (MAP 0620)

5.Look for an SRN indicating a clock problem, such as ªExternal clockº being listed as one of the failing components.

6.Do the ªcss0º diagnostics fail with indication of a clock problem? v If yes:

a.Problem is the clock selection in this SP Switch.

b.Return to ªStep 0620-035º on page 1-33.

vIf no, go to ªStep 0620-039º.

Step 0620-039

The ªcss0º diagnosticsdid not fail. This indicates that the problem is not in this SP Switch.

1.Return all cables to their original positions.

2.Return to ªStep 0620-034º on page 1-33.

Step 0620-040

The clock settings on the problem switch appear to be okay and the problem switch is mounted in a frame that also contains processor nodes. The ground straps appeared to be okay so you set up a test processor node and went through the ªcss0º advanced diagnostics. The diagnostics passed on the first run through so you disconnected the switch data cable and ran the diagnostics a second time. On the second run, the diagnostics failed. This indicated that the problem was not in the SP Switch.

1.Make certain that you replaced the switch data cable corresponding to the selected clock at both SP Switches.

2.Run advanced diagnostics on ªcss0º on the ªtestº processor node and its associated switch port. v Do not perform cable wrap test.

vRefer to ″Running diagnostics in a processor node″ in RS/6000 SP: System Service Guide.

3.Look for an SRN indicating a clock problem, such as ªExternal clockº being listed as one of the failing components.

4.Do the ªcss0º diagnostics fail with indication of a clock problem?

vIf yes, go to ªStep 0620-041º.

± Replace the ªmaster-clockº SP Switch.

vIf no:

a.Interframe clock problem resolved.

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

Step 0620-041

You have determined that there is a problem in the SP Switch and that you need to replace the switch assembly.

1.Put the SP Switch's circuit breaker into the Off (`0') position.

2.Disconnect all switch data cables (also clock cables and data cable interposers, if present) from the bulkhead of the switch assembly.

3.Replace the switch inner chassis.

4.Replace the switch planar.

5.Reinstall all cables inside the switch assembly.

6.Reinstall the top cover.

7.Reinstall the switch assembly.

8.Go to ªStep 0620-042º.

Step 0620-042

You have replaced switch components and need to complete a final check before verifying the fix.

1.Be careful to reconnect all cables according to the appropriate wiring chart or labels, and put wrap plugs on any unused data ports (S00-BH-J3 through S00-BH-J34).

Chapter 1. Maintenance Analysis Procedures (MAPs) 1-35

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Contents IBM Page IBM Fifth Edition April Contents FRU removals and replacements Figures Vi RS/6000 SP SP Switch Service Guide Vii TablesViii RS/6000 SP SP Switch Service Guide Safety notices Safety and environmental noticesRS/6000 SP SP Switch Service Guide SPSFD017 Xii RS/6000 SP SP Switch Service Guide Environmental notices Product recycling and disposal Laser safety informationXiv RS/6000 SP SP Switch Service Guide Who should use this book About this bookRelated information How to send your comments Summary of changes Xviii RS/6000 SP SP Switch Service Guide Maintenance Analysis Procedures MAPs Switch description and problem determination MAP Environment Yellow Power GreenFlashing Priority Message or condition Action Errors in /var/adm/SPlogs/css/out.top seeCondition Action SP Switch environment MAPSwitch connector resistance values Step Priority Component Action SP Switch inner chassis and front chassis cablesStep 10RS/6000 SP SP Switch Service Guide Step 12RS/6000 SP SP Switch Service Guide SP Switch power MAP SP Switch power MAP PDU-BH-P1 PDU-BH-P2 PDU-BH-P3 PDU-BH-P4 PDU-BH-P5 From P1 pin FromEstart SP Switch function MAPEprimary Pg /var/adm/SPlogs/css/out.top Notes Splstdata -n pgSP Switch function MAP SDRGetObjects DependentNode Error # Message/condition Description and actionIf the cabling does not match, correct the cabling Splstdata -s pgE02-N04 L01-S00-BH-J18E02-S00-BH-J18 L03-N01Var/adm/SPlogs/css/out.top file have Priority Message/condition ActionStep Failing components Description Service Request NumberSRN 26RS/6000 SP SP Switch Service Guide Priority Failing component Action 28RS/6000 SP SP Switch Service Guide Step 30RS/6000 SP SP Switch Service Guide Estart Do not perform the cable wrap test Step Do not perform cable wrap test Step Check /var/adm/SPlogs/css/out.top file Naming standard for RS/6000 SP components LocationsFormat structure Major assembly Location diagrams of the RS/6000 SP componentsFigure notes Front and rear views of RS/6000 SP frame2shows a front view of the RS/6000 SP multi-switch frame Front view of 49-inch frame locations. See notes below Frame FRA Frame locationsExample E01-FRA-G1 Air Baffle Switch assembly locationsCable routing Connector details10RS/6000 SP SP Switch Service Guide Cable routing in a multi-switch frame F/C 2030/1 12RS/6000 SP SP Switch Service Guide Cable Part Plug from Plug to Number Location Switch data cables14RS/6000 SP SP Switch Service Guide Personal ESD requirements Service proceduresTools and files overview File see note Location Description Rc.switch.log Utility see note Runs on Description FaultserviceWormRTGRc.switch IfconfigUsing the css.snap script Self-test Conditions Pass sequence Switch supervisor self-testVerification tests using Perspectives Node supervisor verificationFrame supervisor verification Switch supervisor verificationEclock Selecting appropriate switch clocksSelecting the switch clock source Determining the correct switch clock sourceRemoving a switch assembly from the active configuration Removing and restoring switch resourcesNumber of Logical Master Clock Choice Model Frames Viewing switch partitions Restoring a switch assembly to the active configurationResetting the clock and bootlist after servicing a node Replacing a switch assembly from service positionEfence of primary and primary backup nodes Installing adapter microcode packages Installing firmware updates on SP nodesAdapter Package Running diagnostics on a switch port Handling static-sensitive devices FRU removals and replacementsRemoving the switch assembly Procedures for switch assembliesReplacing the switch assembly Replacing the switch fans Removing the switch fansRemoving the switch front chassis cable Removing the switch supervisor card Replacing the switch front chassis cableRemoving the switch inner chassis cable Replacing the switch supervisor cardRemoving the switch power cards Replacing the switch inner chassis cableRemoving the SP Switch power supply cards Replacing the switch power cards8RS/6000 SP SP Switch Service Guide Parts catalog SPS, SPS-8 Switch assembly feature view Assembly Part number Units Description Index 4RS/6000 SP SP Switch Service Guide Inner chassis assembly SPS includes all assembly in shaded Air flow Cable, front chassis SP Switch Data Cables SPS-8 Switch cables featureSP Switch External Cables SPS SPS-8 Parts catalog Multi-switch frame F/C 2030/1 Multi-switch frame F/C 2030/1 12RS/6000 SP SP Switch Service Guide Trademarks European Union EU statement United Kingdom telecommunications safety requirementsIndustry Canada compliance statement Electromagnetic interference EMI statement Taiwan For installations in JapanRadio protection for Germany 4RS/6000 SP SP Switch Service Guide Index Numerics ESD Switch inner chassis cable, SPS Switch partitioning 4RS/6000 SP SP Switch Service Guide How satisfied are you that the information in this book is Readers comments ± Wed like to hear from youPlease tell us how we can improve this book IBM Page IBM
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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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