Specifications - Lenovo ThinkServer RD220 Hardware Maintenance Manual

• Large system-memory capacity
The memory bus supports up to 128 GB of system memory. The memory controller supports error
correcting code (ECC) for up to 16 industry-standard PC3-10600R-999 (single-rank or dual-rank), 800,
1067, and 1333 MHz, DDR3 (third-generation double-data-rate), registered, synchronous dynamic random
access memory (SDRAM) dual inline memory modules (DIMMs).
• PCI adapter capabilities
The server supports up to four PCI interface slots. For more information, see Installing a PCI adapter.
• Redundant connection
The addition of the optional Ethernet daughter card provides failover capability to a redundant Ethernet
connection with the applicable application installed. If a problem occurs with the primary Ethernet
connection and the optional Ethernet daughter card is installed on the server, all Ethernet traffic that is
associated with the primary connection is automatically switched to the optional redundant Ethernet
daughter card connection. If the applicable device drivers are installed, this switching occurs without
data loss and without user intervention.
• 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.
• RAID support
The server supports an internal RAID 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.
• 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.

Specifications

The following information is a summary of the features and specifications of the server. Depending on the
server model, some features might not be available, or some specifications might not apply.
Racks are marked in vertical increments of 4.45 cm (1.75 inches). Each increment is referred to as a unit, or
"U." A 1-U-high device is 1.75 inches tall.
Notes:
1. Power consumption and heat output vary depending on the number and type of optional features that are
installed and the power-management optional features that are in use.
2. The sound levels were measured in controlled acoustical environments according to the procedures
specified by the American National Standards Institute (ANSI) S12.10 and ISO 7779 and are reported in
accordance with ISO 9296. Actual sound-pressure levels in a given location might exceed the average
values stated because of room reflections and other nearby noise sources. The declared sound-power
levels indicate an upper limit, below which a large number of computers will operate.
.
Chapter 3 General information
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