IBM x3650 User Guide - Page 27
Reliability, availability, and serviceability features, Redundant cooling and power capabilities - hard drive
UPC - 883436059565
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v Redundant cooling and power capabilities The server supports three hot-swap fans, which provide redundant cooling. Redundant cooling enables continued operation if one of the fans fails. The server supports up to two 675-watt ac power supplies, which provide redundancy and hot-swap capability for a typical configuration. If the maximum load on the server is less than 675 watts and a problem occurs with one of the power supplies, the other power supply can meet the power requirements. Note: If the maximum load on the server is greater than 675 watts and a problem occurs with one of the power supplies, Active Energy Manager can act to minimize the load somewhat so that the server can function with the remaining power supply. v ServeRAID support The server supports an internal ServeRAID SAS controller, which is required for you to use the hot-swap hard disk drives and to create redundant array of independent disks (RAID) configurations. v Systems-management capabilities The server contains an integrated management module (IMM) which enables you to manage the functions of the server locally and remotely. The addition of the optional IBM Virtual Media Key provides remote presence and blue-screen capture capability. The IMM also provides system monitoring, event recording, and dial-out alert capability. v TCP/IP offload engine (TOE) support The Ethernet controllers in the server support TOE, which is a technology that offloads the TCP/IP flow from the microprocessors and I/O subsystem to increase the speed of the TCP/IP flow. When an operating system that supports TOE is running on the server and TOE is enabled, the server supports TOE operation. See the operating-system documentation for information about enabling TOE. Note: As of the date of this document, the Linux operating system does not support TOE. Reliability, availability, and serviceability features 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 repair problems. The server has the following RAS features: v Automatic error retry and recovery v Automatic restart after a power failure v Built-in monitoring for fan, power, temperature, voltage, and power-supply redundancy v Cable-presence detection on most connectors v Chipkill memory protection v Dual redundant UEFI server firmware images v Error codes and messages v Error correcting code (ECC) L2 cache and system memory v Hot-swap cooling fans with speed-sensing capability v Hot-swap hard disk drives v Information and light path diagnostics LED panels v Integrated management module (service processor) v Memory mirroring Chapter 1. The System x3650 M2 Type 7947 server 11