NEC A1160 manual Subsystem, Indicators on the Memory Board, Dynamic Dimm Sparing, Memory Mirroring

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I/O Subsystem

Indicators on the Memory Board

The memory board contains a green LED to indicate that the board is in service and an amber LED to indicate that the board needs attention. Do not remove a memory board while the green LED is lit.

Dynamic DIMM Sparing

Dynamic DIMM sparing automatically substitutes a spare DIMM in place of an operational DIMM before a high rate of correctable errors leads to an uncorrectable error and loss of data. The cell maintains normal memory operations during the dynamic DIMM sparing process.

In dynamic DIMM sparing, a DIMM, in the last populated slot and next to the last operational DIMM on the channel, must first have been reserved as a spare. Both channels must be populated with identical spare DIMMs in the equivalent slot positions on each channel.

Memory Mirroring

Mirroring is an optional memory addressing mode that provides protection against uncorrectable errors by maintaining two images of memory. With mirroring, all uncorrectable errors, including a complete DIMM or channel failure, will not stop the system.

Mirroring is between the two memory boards within the cell. (Mirroring between memory boards in different cells is not supported.) On detection of a memory failure, the system breaks the mirror and continues operation out of the remaining "good" memory board.

Once the mirror has been broken, you can remove the memory board with the failed DIMM, replace the DIMM, reinstall the memory board, and reestablish mirroring.

I/O Subsystem

The I/O subsystem consists of the I/O riser board, PCIe cards, and the PCIe card carrier.

I/O Riser Board

The I/O riser board contains the following components:

yThree PCIe-to-PCIe x8 switches with each switch supporting two PCIe card slots

ySix PCIe slots which support the following features:

-Two full-length cards slots (slots 1 and 4) and four half-length card slots

-Full-height cards

-25 watts per slot

-PCI Express Gen 1 (2.5 Gbps)

-Hot-plug capability

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Contents EXPRESS5800/A1160 Technical Overview ƒProprietary Notice and Liability Disclaimer DecemberContents Contents Figures Page Tables ViiPage Using This Guide Who Should Use This GuidePage Safety Notices Safety NoticesPage Safety Notices for Users Outside of the U.S.A. and Canada Page Documentation Updates Scalable Symmetric Multiprocessing ServersWindows Operating Systems Operating SystemsOperating Systems Linux Operating Systems Virtual Machine MonitorsVirtual Machine Monitors Page Cell Component Express5800/A1160 CellProcessors ProcessorsProcessor Sockets Multicore Processors Supported ProcessorsRules for Mixing Processors Extended Memory 64 Technology EM64TProcessor Voltage Regulator Modules Node ControllerMemory MemoryDimm Slot Numbering Memory BoardsDimm Capacity and Cell Memory Dimm Capacity and Cell MemoryRules for Memory Expansion Dynamic Dimm Sparing Indicators on the Memory BoardSubsystem Memory MirroringPCIe Card Carrier I/O Riser BoardPorts PCIe Card CarrierInbuilt RAID Controller Ports on Back of the CellAC/DC Power Supplies PowerPower Power ControlVolt Redundancy and AC Source Options Partitions and PowerUninterruptible Power Supply UPS CoolingCooling Peripherals PeripheralsBoot Options External PeripheralsSystem Clocks System ClocksExpressscope Monitor Device Names on the Expressscope Monitor LCD Fault Messages on the Expressscope Monitor LCDFault Messages on the Expressscope Monitor LCD CRU Inbuilt Virtualization Inbuilt VirtualizationTrusted Platform Module TPM For More InformationSystem Configuration Cell Interconnect and Multiple Cell SystemsCell Interconnect and Multiple Cell Systems System with Two CellsCell Identification Cell IdentificationSystem Serial Number Relation of Interconnect Port and Cable End to Cell IDCabinets CabinetsPartitions PartitionsClustering Replaceable Components Redundant ConfigurationsRedundant Configurations Clustering SoftwareMinimum and Maximum Configurations Express5800/A1160 Configuration SummaryExpress5800/A1160 Configuration Summary Page Server Management System ComponentsNetwork Components Client Workstation Windows Domain ControllerManagement Server Console Manager Client SoftwareMain Components Management ArchitectureIntelligent Platform Management Interface Management Board Management BoardService Processor Firmware HubTrusted Platform Module TPM Remote Console InterfacesRemote Console Interfaces PortsBios Server Management SoftwareManagement Software Components Management Software ComponentsEsmpro Manager and Agent Accessing Remote Monitoring Remote MonitoringCell Components Components on the Front of a CellComponents on the Rear of a Cell LCDComponents on the Rear of a Cell AC power cord