Dell PowerEdge 1950 Information Update - Page 8

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Table 1-4. Integrated Devices Screen Options

Option

I/OAT DMA Engine

(Disabled default)

Memory Screen

Table 1-5 lists a new option on the Memory screen.

Table 1-5. Memory Screen Options

Option

Low Power Mode

(Disabled default)

Linux Enumeration of NICs

Linux operating system versions that use the udev kernel device manager enumerate the NICs differently

than earlier Linux versions that used the devfs device manager. Although this does not affect system

functionality, when using Red Hat

operating systems, the NICs are enumerated in reverse: NIC1 is configured as eth1 instead of eth0,

and NIC2 is configured as eth0 instead of eth1. For information on how to change the default device

enumerations, see the "Network Interface Card Naming" white paper available at linux.dell.com.

AutoCool Operation

Whenever your system is in standby mode (powered down but still connected to AC power), internal

components may generate enough heat for the system to turn on the cooling fans periodically. When

this occurs, the LCD lights a solid blue background and displays the message Autocool. The system

also lights the power button LED and the power supply LED.

Autocool occurs automatically and is a normal function of your system. The frequency and duration of

the Autocool operation will vary according to conditions such as the ambient heat or where the system

is configured in a rack.

NOTE:

Although the power button and power supply LEDs are on when the Autocool feature is operating, the

system is still powered down in standby mode. There are no means for controlling the Autocool mode or turning

the fans off when they are engaged. The feature is solely controlled by the system BMC firmware.

Information Update

Description

Enables or disables the I/O Acceleration Technology (I/OAT) option. When set

to Enabled, I/OAT reduces system CPU usage for applications that use TCP by

offloading part of TCP receive operation to the DMA engine.

Description

Enables or disables Low Power Mode of the memory. When set to Enabled, the

memory runs at reduced speed to conserve power. Disabled sets the memory to run

at full speed.

Enterprise Linux (version 4) or SUSE

Linux Enterprise Server 9