Ethernet daughter card connection. If the applicable device drivers are installed,
this switching occurs without data loss and without user intervention.
v Redundant cooling and optional power capabilities
The server supports a maximum of two 675-watt or 460-watt hot-swap power
supplies and six dual-motor hot-swap fans, which provide redundancy and
hot-swap capability 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 675-watt or 460-watt hot-swap power supply and five fans.
You must install the sixth fan when you install the second microprocessor in the
server. You can order the second optional power supply for power redundancy.
Note: You cannot mix 460-watt and 675-watt power supplies, high-efficiency
and non-high-efficiency power supplies, or ac and dc power supplies in the
server.
v 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, 1, and 1E. An optional RAID adapter is available for
purchase.
v Systems-management capabilities
The server comes with an integrated management module (IMM). When the
IMM is used with the systems-management software that comes with the server,
you can manage the functions of the server locally and remotely. The IMM also
provides system monitoring, event recording, and network alert capability. The
system-management connector on the rear of the server is dedicated to the IMM.
The dedicated system-management connector provides additional security by
physically 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.
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 microprocessor 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.
Chapter 1. The IBM System x3550 M3 server 13