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Cisco UCS B230 Blade Server Installation and Service Note
OL-23811-01
Removing a Blade Server Cover
Blade Server Internal Components
Figure 6 calls out the various components within the blade server.
Figure 6 Inside View of a Blade Server
Diagnostics Button and LEDs
At blade start-up, POST diagnostics test the CPUs, DIMMs, and adapter cards, and any failure
notifications are sent to Cisco UCS Manager. You can view these notifications in the System Error Log
or in the output of the show tech-support command. If errors are found, an amber diagnostic LED also
lights up next to the failed component. During run time, the blade BIOS, component drivers, and OS all
monitor for hardware faults and will light up the amber diagnostic LED for a component if an
uncorrectable error or correctable errors (such as a host ECC error) over the allowed threshold occur.
Diagnostic LED states are saved and if you remove the blade from the chassis the LED values persist for
up to 10 minutes. Pressing the LED diagnostics button on the motherboard causes the LEDs that
currently show a component fault to light for up to 30 seconds for easier component identification. LED
fault values are reset when the blade is reinserted into the chassis and booted, and the process begins
from its start.
If DIMM insertion errors are detected, they may cause the blade discovery to fail and errors are reported
in the server POST information, viewable using the UCS Manager GUI or CLI. UCS blade servers
require specific rules to be followed when populating DIMMs in a blade server, and the rules depend on
the blade server model.
Drive status LEDs are on the front face of the server. Faults on the CPU, DIMMs, or adapter cards also
cause the server health LED to light solid Amber for minor error conditions or blinking Amber for
critical error conditions.
1 DIMM slots 2 CPU 1 and heat sink
3 CPU 2 and heat sink 4 DIMM slots
5 Adapter card connector 6 Diagnostic button
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