v VMware ESXi embedded hypervisorAn optional USB flash device with VMware ESXi embedded hypervisor softwareis available for purchase. Hypervisor is virtualization software that enablesmultiple operating systems to run on a host system at the same time. The USBembedded hypervisor flash device can be installed in the internal USB connectoron the system board. For more information about using the embeddedhypervisor, see “Using the embedded hypervisor” on page 118.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.Your server has the following RAS features:v 3-year parts and 3-year labor limited warranty (Machine Type 7914)v 24-hour support centerv Automatic error retry and recoveryv Automatic restart on nonmaskable interrupt (NMI)v Automatic restart after a power failurev Back up basic input/output system switching under the control of the integratedmanagement module (IMM)v Built-in monitoring for fan, power, temperature, voltage, and power-supplyredundancyv Cable-presence detection on most connectorsv Chipkill memory protectionv Double-device data correction (DDDC) for x4 DRAM technology DIMMs(available on 16 GB DIMMs only). Ensures that data is available on a single x4DRAM DIMM after a hard failure of up to two DRAM DIMMs. One x4 DRAMDIMM in each rank is reserved as a space device.v Diagnostic support for ServeRAID and Ethernet adaptersv Error codes and messagesv Error correcting code (ECC) L3 cache and system memoryv Full Array Memory Mirroring (FAMM) redundancyv Hot-swap cooling fans with speed-sensing capabilityv Hot-swap hard disk drivesv Information and light path diagnostics LED panelsv Integrated Management Module (IMM)v Light path diagnostics LEDs for memory DIMMs, microprocessors, hard diskdrives, solid state drives, power supplies, and fansv Memory mirroring and memory sparing supportv Memory error correcting code and parity testv Memory down sizing (non-mirrored memory). After a restart of the server afterthe memory controller detected a non-mirrored uncorrectable error and thememory controller cannot recover operationally, the IMM logs the uncorrectableerror and informs POST. POST logically maps out the memory with theuncorrectable error, and the server restarts with the remaining installed memory.v Menu-driven setup, system configuration, and redundant array of independentdisks (RAID) configuration programsv Microprocessor built-in self-test (BIST), internal error signal monitoring, internalthermal trip signal monitoring, configuration checking, and microprocessor andvoltage regulator module failure identification through light path diagnosticsv Nonmaskable interrupt (NMI) buttonv Parity checking on the small computer system interface (SCSI) bus and PCI-Eand PCI/PCI-X busesChapter 1. The IBM System x3550 M4 server 13
