Diagnostics Button And Leds - Cisco UCS B460 M4 Installation And Service Note

Servicing the Blade Server
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Note • A squeeze-to-remove retaining clip is provided to secure the internal USB flash memory. The clip must
• Use of this server may require an upgrade to the FEX in the chassis. The Cisco 2104XP fabric extender

Diagnostics Button and LEDs

At blade start-up, POST diagnostics test the CPUs, DIMMs, HDDs, and rear mezzanine modules, and any
failure notifications are sent to Cisco UCS Manager. You can view these notifications in the Cisco UCS
Manager 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 and component
drivers monitor for hardware faults and will light up the amber diagnostic LED as needed.
LED states are saved, and if you remove the blade from the chassis the LED values will 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 process to fail and errors will be
reported in the server POST information, which is viewable using the UCS Manager GUI or CLI. DIMMs
must be populated according to specific rules. The rules depend on the blade server model. Refer to the
documentation for a specific blade server for those rules.
Faults on the DIMMs or rear mezzanine modules also cause the server health LED to light solid amber for
minor error conditions or blinking amber for critical error conditions.
Cisco UCS B260 M4 and B460 M4 Blade Server Installation and Service Note for Servers with E7 v3 and E7 v2 CPUs
Internal USB connector
A Cisco USB drive is
recommended, but if you
use another USB drive, it
must be no wider than 0.8
inches (20 mm), and no
more than 1.345 inches
(34 mm) long in order to
provide needed clearances
to install or remove the
USB device. USB flash
memory from sources
other than Cisco is
allowed, but is not
supported by Cisco and is
used at the user's risk.
always be securely fastened when the flash memory is in use. Memory that does not fit in the clip should
not be used.
is not compatible when any Cisco-certified adapter is installed in slot 1 or slot 2. If a Cisco VIC 1240
modular LOM card is installed, you will have connectivity through the mLOM but other adapters will
not be recognized.

Diagnostics Button and LEDs

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