Reliability, availability, and serviceabilityThree important computer design features are reliability, availability, andserviceability (RAS). The RAS features help to ensure the integrity of the data thatis stored in the server, the availability of the server when you need it, and the easewith which you can diagnose and correct problems.The server has the following RAS features:v Active memoryv Active ™ PCI-X (hot-plug) adapter slotsv Automatic BIOS recovery (ABR)v Automatic error retry and recoveryv Automatic restart after a power failurev Availability of microcode and diagnostic levelsv Backup basic input/output system (BIOS) switching under the control of theservice processorv Baseboard management controller (service processor)v Built-in, menu-driven electrically erasable programmable ROM (EEPROM) basedsetup, system configuration, and diagnostic programsv Built-in monitoring for fan, power, temperature, voltage, and power-supplyredundancyv Chipkill ™ memory protectionv Error codes and messagesv Error correcting code (ECC) L2 cache and system memoryv Fault-resistant startupv Hot-swap hard disk drivesv IBM Director workgroup-hardware-management toolv Information and light path diagnostics LED panelsv Optional service processor adapter for remote system managementv Parity checking on the small computer system interface (SCSI) bus and PCIbusesv Power managed and Advanced Configuration and Power Interface (ACPI)compliantv Power-on self-test (POST)v Predictive Failure Analysis ® (PFA) alertsv Redundant Ethernet capabilities (requires optional Ethernet adapter) with failoversupportv Redundant hot-swap capability– Cooling fans with speed-sensing capability– Power suppliesv Remind button to temporarily flash the Attention LEDv Remote system problem-determination supportv ROM-based diagnostic programsv Standby voltage for systems-management features and monitoringv Startup (boot) from LAN using Preboot Execution Environment (PXE) protocolv System auto-configuring from the configuration menuv System error logging (POST and service processor when Remote SupervisorAdapter II SlimLine is installed)v Upgradeable microcode for POST, BIOS, diagnostics, service processor, andread-only memory (ROM) resident code, locally or over the LANv Vital product data (VPD) on microprocessors, system boards, power supplies,and SAS (hot-swap-drive) backplanev Wake on LAN ® capabilityChapter 1. The System x3950 and System x3950 E server 7