IBM RS/6000 SP manual Fencing nodes, Efence of primary and primary backup nodes

Page 68

Using Perspectives to fence and unfence nodes attached to the switch

Fencing nodes

1.Bring up Hardware Perspectives for the system

2.Select the node to be fenced by either: v Double clicking the node

vOpening the node's notebook

3.Select either:

vFence

vFence with autojoin

Note: Selecting the autojoin option will automatically place the node back into the operations of the partition on successful power on of the Node. It is suggested that ªAutojoinºnot be selected at any time when performing a service action.

4. Click ″Apply″

Unfencing nodes

1.Bring up Hardware Perspectives for the system

2.Select the node to be unfenced by either: v Double clicking the node

vOpening the node's notebook

3.Select ªUnfenceº

4.Click ªApplyº

Efence of primary and primary backup nodes

System design does not allow Efence of primary and backup nodes by default. However, with the -f option, the primary and primary backup node may be fenced. In this case, a new oncoming primary node or oncoming primary backup node will be selected for you and an Estart will be issued. You will need to use the Eprimary command after the Efence command has completed to see what the new primary and primary backup nodes are.

Service position procedures

Note: When placing a switch into the service position, ensure that the customer has removed the switch from the active configuration.

Placing an SP Switch2 into service position

Note: Make certain the switch has been removed from the active configuration before placing the switch into the service position.

1.Place the switch circuit breaker in the Off (`0') position.

2.Set the inline switch on the power cable to the Off (`0') position.

3.At the rear of the switch, remove the power cable from slot J1 and the supervisor cable from slot J2.

4.Record the positions of all switch cables connected to the interposers in slots J3 through J34.

5.Remove the switch cables.

6.Remove the switch mounting screws from the front of the frame.

7.Remove the switch by sliding it out of the front of the frame.

3-10RS/6000 SP: SP Switch2 Service Guide

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Contents IBM Page IBM Fourth edition April Contents FRU removals and replacements Figures Vi RS/6000 SP SP Switch2 Service Guide Tables Viii RS/6000 SP SP Switch2 Service Guide Safety and environmental notices Safety notices in EnglishRS/6000 SP SP Switch2 Service Guide SPSFD017 Xii RS/6000 SP SP Switch2 Service Guide Laser safety information Environmental notices Product recycling and disposalXiv RS/6000 SP SP Switch2 Service Guide Related information About this bookWho should use this book Users responsibilities How to use this bookHow to send your comments Maintenance Analysis Procedures MAPs Switch MAPsSwitch description and problem determination MAP Purpose of this MAPSwitch Assembly Description SP Switch2 Switch Connection Types Standard NodeSwitch-to-Switch SP Switch2 Assembly High-Level Diagram Green Power LED Yellow Environment LEDFlashing Errpt -a -N sphwlog pg Errpt -a -N css0 Errpt -a -N WormSP Switch2 Wrap Plugs Priority Message or condition ActionTogether Switch supervisor communications MAPGreen LED Yellow LED Indication Switch supervisor communications MAP Switch supervisor communications MAP Switch environment MAP Condition ActionPriority Component Action SP Switch2 Chassis Assembly Power supply failure diagnostics Switch power MAP Switch power MAP Step 16RS/6000 SP SP Switch2 Service Guide Switch function MAP EstartPg /var/adm/SPlogs/css0/p0/out.top Notes EprimarySplstdata -n pg Switch Function MAP Var/adm/SPlogs/css0/p0/out.top file on the primary Error # Device Message Link Message Description and ActionStarts the faultserviceWormRTGCS daemon If the cabling does not match, correct the cabling E02-S17-BH-J18 E02-N05E06-S02-BH-J3 Priority Condition ActionStep Failing Component Description Service RequestNumber SRN Priority Failing Component Action26RS/6000 SP SP Switch2 Service Guide Dsh -w nodelist /usr/lpp/ssp/css/rc.switch Dsh -a /usr/lpp/ssp/css/rc.switch Format structure LocationsNaming standard for RS/6000 SP components Location diagrams of the RS/6000 SP components Major assemblyFront and rear views of RS/6000 SP frame Figure notes2shows a front view of the RS/6000 SP multi-switch frame Frame locations Frame FRAExample E01-FRA-G1 Switch assembly locations Connector detailsCable routing Locations Cable routing in a multi-switch frame F/C Switch data cables Cable Part Plug from Plug to Number Location12RS/6000 SP SP Switch2 Service Guide Tools and files overview Service proceduresPersonal ESD requirements Utility Runs on Description Directory FaultserviceWormRTGCS Rc.switchUsr/lpp/ssp/css/rc.switch IfconfigUsing the css.snap script Var/adm/SPlogs/cssX where X=0 or Var/adm/SPlogs/cssX/p0 where X=0 orCss.snap file structure Var/adm/SPlogs/cssMost recent css.snaps splstdata Most recent css.snaps ifcldumpMost recent css.snaps readregs SP Switch2 supervisor self-test Css.snap file package namesDisk space handling If the -a and -p flags are not usedSwitch supervisor status verification using Perspectives Opening a switch paneChecking switch status Self-test ConditionsUpdating the SP Switch2 supervisor code Base code verificationRestoring an SP Switch2 to the active configuration Removing and restoring switch resourcesRemoving an SP Switch2 from the active configuration Efence of primary and primary backup nodes Fencing nodesReplacing an SP Switch2 from service position Resetting the clock and bootlist after servicing a nodeRunning diagnostics on a switch port FRU removals and replacements Handling static-sensitive devicesReplacing a fan assembly SP Switch2 service proceduresRemoving a fan assembly Removing a power supply Replacing a power supplyRemoving the LED bracket assembly Replacing the LED bracket assemblyRemoving the switch supervisor card Replacing the switch supervisor card Removing an interposer cardRemoving the switch planar Replacing an interposer cardReplacing the switch planar Removing the 48 V dc circuit breaker assemblyReplacing the 48 V dc circuit breaker assembly Removing the LED power extension cableReplacing the LED power extension cable Parts catalog SP Switch2 assembly view Assembly Part number Units Description Index 4RS/6000 SP SP Switch2 Service Guide Baffle, Power Supply Bay Tray Switch cables This page intentionally left blankSwitch cables SP Switch2 Frame F/C FrontSP Switch2 Frame F/C 2032 frame extender F/C 2032 frame extender SP Switch2 Frame Model 556 and F/C SP Switch2 Frame Model 556 and F/C Model 556 and F/C 2034 frame extender Model 556 and F/C 2034 frame extender 16RS/6000 SP SP Switch2 Service Guide Trademarks AIXIndustry Canada compliance statement United Kingdom telecommunications safety requirementsEuropean Union EU statement Radio protection for Germany For installations in JapanElectromagnetic interference EMI statement Taiwan 4RS/6000 SP SP Switch2 Service Guide Index Numerics Files Created by css.snap Removing LED bracket 4RS/6000 SP SP Switch2 Service Guide Please tell us how we can improve this book Readers comments ± Wed like to hear from youHow satisfied are you that the information in this book is Business Reply Mail Page Ibmr
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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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