Dell PowerEdge 6650 - Manual (Page 18)

The power button is used to turn the power supplies on and off, while the NMI button is used for debugging (see your Installation and Troubleshooting Guide for
more information).
LCD Status Messages
The system's front-bezel indicator shows whether the system is operating correctly or whether it needs attention (see Figure 1 -1 ). When the status and/or
caution indicator indicates an error condition, open the bezel for more information provided on the LCD.
The LCD displays two lines of five alphanumeric characters. The display codes are presented in two color combinations:
l White characters on a blue background — Information only; no action is required.
l Amber characters on a black background — The system needs attention.
For more information about LCD status messages, see your Installation and Troubleshooting Guide.
SCSI Hard-Drive Indicator Codes
Each hard-drive carrier has two indicators that provide information on the status of the SCSI hard drive: a busy indicator and a status indicator (see Figure 1 -3
and Table 1 -2 ).
Figure 1-3. SCSI Hard-Drive Indicators
The drive-busy indicator lights when data is transferred to or from the hard drive. The drive-status indicator denotes whether the hard drive is active on the
SCSI bus. This indicator is controlled by the hard drive.
Table 1 -2 lists the drive status indicator codes controlled by the backplane board firmware. Different codes are displayed as drive events occur in the system.
For example, in the event of a hard-drive failure, the "drive failed" code appears. After the drive is selected for removal, the "drive being prepared for removal"
code appears, followed by the "drive ready for insertion or removal" code. After the replacement drive is installed, the "drive being prepared for operation"
code appears, followed by the "drive online" code.
NOTE: If you turn off the system using the power button and the system is running an ACPI-compliant operating system (such as Microsoft®
Windows® 2000), the system performs a graceful 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.
Table 1-2. SCSI Hard-Drive Indicator Codes