Dell PowerEdge 1800 - Manual (Page 10)

Table 1-2. Front-Panel LED Indicators, Buttons, and Connectors
SCSI Hard-Drive Indicator Codes
Each SCSI hard-drive carrier has two indicators: an activity indicator and a status indicator (see Figure 1 -3 ). The indicators provide information on the status of
the hard drive.
Figure 1-3. SCSI Hard-Drive Indicators
Indicator, Button,
or Connector
Icon Description
Blue system-status
indicator
The blue system-status indicator lights during normal system operation. Both the systems management software and the
identification buttons located on the front and back of the system can cause the blue system-status indicator to flash to
identify a particular system.
Amber system-status
indicator
The amber system-status indicator flashes when the system needs attention due to a problem with power supplies, fans,
system temperature, or SCSI hard drives.
NOTE: If the system is connected to AC power and an error has been detected, the amber system status indicator flashes
regardless of whether the system has been powered on.
Power button and
power-button
indicator
The power button controls the DC power supply output to the system.
NOTE: If you turn off the system using the power button and the system is running an ACPI-compliant operating system,
the system performs a smooth shutdown before the power is turned off. If the system is not running an ACPI-compliant
operating system, the power is turned off immediately after the power button is pressed.
The power-button indicator lights up when power is supplied to the system and the system is operational; it is off when no
power is supplied to the system; and it is blinking when the system is in a standby state. For information on standby
states, see your operating system documentation.
Power-on indicator
The power-on indicator lights when the system power is on. The power-on indicator blinks when power is available to the
system but the system is not powered on.
System identification
button
The identification buttons on the front and back panels can be used to locate a particular system within a rack. When one
of these buttons is pressed, the blue system status indicator on the front and back blinks until one of the buttons is
pressed again.
USB connectors Connects USB 2.0-compliant devices to the system.
NMI button
Used to troubleshoot software and device driver errors when using certain operating systems. This button can be pressed
using the end of a paper clip.
Use this button only if directed to do so by qualified support personnel or by the operating system's documentation.
NOTE: The drive-activity indicator is not available on systems with optional SATA hard-drives.