Reliability, Availability, And Serviceability - Lenovo x3650 M4 BD 5466 Installation And Service Manual

with the primary connection is automatically switched to the optional redundant Ethernet connection.
If the applicable device drivers are installed, this switching occurs without data loss and without user
intervention.
• Redundant cooling and optional power capabilities
The server supports a maximum of two 750-watt or 900-watt hot-swap power supplies and three
dual-motor non hot-swap fans, which provide redundancy for a typical configuration. The redundant
cooling by the fans in the server enables continued operation if one of the fans fails. The server comes
with one 750-watt or 900-watt hot-swap power supply and three non hot-swap fans.
Note: You cannot mix 750-watt and 900-watt power supplies in the server.
• ServeRAID support
The ServeRAID adapter provides hardware redundant array of independent disks (RAID) support to create
configurations. The standard RAID adapter provides RAID levels 0 and 1. An optional RAID adapter is
available for purchase.
• Systems-management capabilities
The server comes with an integrated management module II (IMM2). When the IMM2 is used with the
systems-management software that comes with the server, you can manage the functions of the server
locally and remotely. The IMM2 also provides system monitoring, event recording, and network alert
capability. The system-management connector on the rear of the server is dedicated to the IMM2. The
dedicated system-management connector provides additional security by separating the management
network traffic from the production network. You can use the Setup utility to configure the server to use
a dedicated systems-management network or a shared network.

Reliability, availability, and serviceability

Three important computer design features are reliability, availability, and serviceability (RAS). The RAS
features help to ensure the integrity of the data that is stored in the server, the availability of the server when
you need it, and the ease with which you can diagnose and correct problems.
The server has the following RAS features:
• Automatic error retry and recovery
• Automatic restart after a power failure
• Built-in monitoring for fan, power, temperature, voltage, and power-supply redundancy
• Cable-presence detection on most connectors
• Chipkill memory protection
• Dual redundant UEFI server firmware images
• Error codes and messages
• Error correcting code (ECC) L2 cache and system memory
• Cooling fans with speed-sensing capability
• Hot-swap hard disk drives (for servers that support such drives)
• Information and light path diagnostics LED panels
• Integrated management module (service processor)
• Memory mirroring
• Menu-driven setup, system configuration, and redundant array of independent disks (RAID) configuration
programs
• Parity checking or CRC checking on the serially-attached SCSI (SAS) bus and PCI buses
• Power management: compliance with Advanced Configuration and Power Interface (ACPI)
• Power-on self-test (POST)
• Predictive Failure Analysis (PFA) alerts on memory, SAS/SATA hard disk drives and fans
• Redundant Ethernet capabilities with failover support
• Redundant hot-swap power supplies
• Remote system problem-determination support
• Standby voltage for systems-management features and monitoring
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Lenovo System x3650 M4 BDInstallation and Service Guide