Lenovo 70AL, Maintenance Manual, Page: 21 / 190

Expansion slots
The server has four expansion slots on the system board. For detailed information, see “System board
components” on page 38.
Input/Output (I/O) features
• One Video Graphics Array (VGA) DB-15 connector on the rear panel
• Eight USB connectors (two USB 3.0 connectors on the front panel; four USB 3.0 and two USB 2.0
connectors on the rear panel)
• One RJ-45 Ethernet connector on the rear panel
• One serial connector on the rear panel
For the location information about the connectors, refer to the related topics in “Locations” on page 11.
Ethernet connectivity
The server comes with an integrated Intel Gigabit Ethernet controller as well as an Ethernet physical layer
(PHY) of the Open Systems Interconnection model (OSI model). They provide the server with the ability to
support the Ethernet connector on the rear panel with 10 megabits per second (Mbps), 100 Mbps, or 1000
Mbps network connectivity. For more information, see “Rear view of the server” on page 16.
Reliability, availability, and serviceability
Reliability, availability, and serviceability (hereinafter referred to as RAS) are three important server design
features. The RAS features help you to ensure the integrity of the data stored on the server, the availability of
the server when you need it, and the ease with which you can diagnose and correct problems.
Your server has the following RAS features:
• Security features
– Server locks (see “Server locks” on page 19)
– Administrator password and power-on password to help protect unauthorized access to the server
(see “Using passwords” on page 51)
– ThinkServer Trusted Platform Module (TPM), which is a security chip, to help enhance server security
– Hot-swap redundant power supplies to help avoid significant interruption to the operation of the
system when a power supply fails (available in some models)
• Basic system management features
– Ability to store the power-on self-test (POST) hardware test results
– BIOS Setup Utility program
The BIOS Setup Utility program helps you view the server information and configure the server in the
pre-operating system environment. See “Using the Setup Utility program” on page 47.
– Hot-swap feature
Some models support hot-swap hard disk drives and hot-swap redundant power supplies. With
the hot-swap feature, you can install, remove, or replace hard disk drives or a failing power supply
without turning off the server.
– Preboot Execution Environment (PXE)
The Intel PXE technology enables you to start your computers, load an operating system, or deploy
executable images from a remote server by using a network interface. The operation can be done
independently of local data storage devices (such as hard disk drives) or installed operating systems.
Chapter 3
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Product overview
9