Lenovo RD120 User Manual download pdf (Page 20)

v Easy LED Diagnostics

Easy LED Diagnostics provides LEDs to help you diagnose problems. For more

information, see the section about Easy LED Diagnostics in the Hardware

Maintenance Manual.

v Memory mirroring

Memory mirroring improves the reliability of memory by writing information to the

main memory and redundant locations in a mirrored pair of DIMMs.

v Online-spare memory

Online-spare memory disables a failed pair of DIMMs from the system

configuration and activates an online-spare DIMM pair to replace the failed pair.

v PCI Express adapter capabilities

The server has two slots for low-profile PCI Express x4 adapters. These slots

accept x8 adapters, but the adapters will operate as x4 adapters. The server also

has two slots for PCI Express x8 adapters (on the riser card, full-height, one

full-length and one half-length).

Note: You can replace these PCI Express x8 slots with PCI-X 133 MHz slots by

replacing the PCI Express riser-card assembly with an optional PCI-X riser-card

assembly.

v Redundant connection

The addition of an optional network interface card (NIC) provides a failover

capability to a redundant Ethernet connection. If a problem occurs with the

primary Ethernet connection, all Ethernet traffic that is associated with the

primary connection is automatically switched to the redundant NIC. If the

applicable device drivers are installed, this switching occurs without data loss and

without user intervention.

v Redundant cooling and power capabilities

The server supports up to 10 hot-swap fans, in multiples of 5, which provide

redundant cooling. Redundant cooling enables continued operation if one of the

fans fails. The server supports up to two 835-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 835 watts and a problem occurs with

one of the power supplies, the other power supply can meet the power

requirements.

Note: A 700-watt-48 volt dc power supply option may be available. The dc

power supplies provide redundancy but no hot-swap capability.

v RAID support

The server supports an internal ServeRAID-8k or 8k-l 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.

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Lenovo RD120 User Manual Page 20