Owner's Manual

* CMC Web Interface: Go to Chassis Overview → Logs to view the CMC logs.

* RACADM: Use the getsel, getraclog or gettracelog commands.

Check if the PSU comes online after this action. To verify, in the CMC Web interface, go to Power Supplies →

Properties. The Power Supply Status page is displayed. The Power Status value should be Online for each PSU. If

the problem persists, contact Dell Technical Support to replace the PSU.

Modular Server in the Chassis Does Not Power On

1. Make sure that all the Power Supply Units (PSUs) are firmly connected to AC or DC cord and status for each PSU

should be online or standby. Check the system input power cap setting in the Budget/Redundancy Configuration

section of the CMC Web interface (Chassis Overview → Power → Configuration .) If the power cap setting value is

configured too low, then it does not allow any additional servers to turn on.

2. If the problem persists, check for 110V operation. If any PSU is connected to a 110V branch circuits, verify if this is a

valid configuration before servers are allowed to turn on. For more details, see the Power Configuration settings in

the Budget/Redundancy Configuration section of the CMC Web interface.

Check if the PSU status changes to online after this action. If the problem persists, contact the Dell Technical

Support to replace the PSU.

3. If the problem persists, select the Max Power Conservation setting in the Budget/Redundancy Configuration

section of the CMC Web interface.

In the Maximum Power Conservation mode, all servers function at their minimum power threshold, and all

subsequent server power allocation requests are denied. In this mode, the performance of the powered on servers

may be reduced. Additional servers cannot be powered on, regardless of server priority. The system is restored to

full performance when the Maximum Power Conservation option is cleared. For more details, see the Power

Configuration settings in the

Dell Chassis Management Controller Firmware Version 4.3 User’s Guide

available at

dell.com/support/manuals.

4. If the problem persists, check the server slot power priority of the slot associated with the newly inserted server,

and make sure it is not lower than any other server slot power priority.

The least priority servers lose power after a PSU failure. This is the expected behavior if the enclosure power

policy was configured to No Redundancy.

5. To avoid a future power supply failure causing servers to turn off, make sure that the chassis has at least four

PSUs. To prevent PSU failure from impacting server operation, make sure that the chassis is configured for the

Power Supply Redundancy policy.

Unable to Access CMCs and Server iDRACs

1. If you are able to access or ping the CMC IP address, make sure that all network cables are connected properly

and network settings are configured properly. Connect a Serial cable to the CMC. After you receive the login

prompt, check the network settings using the

racadm getconfig -g cfglannetworking command. If there is any

change needed in network settings like VLAN settings, IP address, Subnet, Gateway change, from DHCP to static IP

or from static IP to DHCP, run the racadm help config -g cfglannetworking command and follow the examples

provided in the output. Also, make sure that the VLAN settings are correct in CMC and Rack switches.

2. If the problem persists or if you are unable to access CMC from Serial connection, then physically remove and

reinsert CMC in the chassis.

During this operation, IP address of all servers and iDRAC is temporarily inaccessible. It takes around five minutes

for the CMC to reboot. Log in to CMC through the Web interface or RACADM (Telnet/SSH/Serial) interface using the

IP address and view the active errors in the CMC logs:

– CMC Web interface: Go to Chassis Overview → Logs to view the CMC logs.