Lenovo ThinkSystem SN850 Setup Manual page 24

4 6 Drive status LED (yellow)
The state of this yellow LED indicates an error condition or the RAID status of the associated hard disk drive
or solid-state drive:
• When the yellow LED is lit continuously, it indicates that an error has occurred with the associated drive.
The LED turns off only after the error is corrected. You can check the CMM event log to determine the
source of the condition.
• When the yellow LED flashes slowly (one time per second), it indicates that the associated drive is being
rebuilt.
• When the yellow LED flashes rapidly (four times per second), it indicates that the associated drive is being
located.
• The drive status LED might be in a different location on the front of the drive, depending on the drive type
that is installed.
Power button/LED (green)
7
When the compute node is connected to power through the Flex System chassis, press this button to turn on
or turn off the compute node.
For more information about the CMM power command, see
Command-Line Interface Reference Guide at http://flexsystem.lenovofiles.com/help/topic/
com.lenovo.acc.cmm.doc/cli_command_power.html
Note: The power button works only if local power control is enabled for the compute node. Local power
control is enabled and disabled through the CMM power command and the CMM web interface.
After the compute node is removed from the chassis, press and hold this button to activate the system-
board LEDs and light path diagnostics. See the ThinkSystem SN850 Maintenance Manual Viewing the light
path diagnostics LEDs for more information.
This button is also the power LED. This green LED indicates the power status of the compute node:
• Flashing rapidly: The LED flashes rapidly (four times per second) for one of the following reasons:
– The compute node has been installed in a powered chassis. When you install the compute node, the
LED flashes rapidly while the XClarity Controller in the compute node is initializing and synchronizing
with the Chassis Management Module. The time required for a compute node to initialize varies by
system configuration.
– Power permissions have not been assigned to the compute node through the Chassis Management
Module.
– The Flex System chassis does not have enough power to turn on the compute node.
– The XClarity Controller in the compute node is not communicating with the Chassis Management
Module.
The power LED blink rate slows when the compute node is ready to be turned on.
• Flashing slowly: The LED flashes slowly (one time per second) means the compute node is connected to
power through the Flex System chassis and is ready to be turned on.
• Lit continuously: The compute node is connected to power through the Flex System chassis and is
turned on.
When the compute node is on, pressing this button causes an orderly shutdown of the compute node so that
it can be removed safely from the chassis. This includes shutting down the operating system (if possible) and
removing power from the compute node.
ThinkSystem SN850 Compute Node Setup Guide
16
Flex System Chassis Management Module:
.