IBM disk systems- Shutting down a cluster node server in the administrative interface does not work

When you shut down a cluster node server in the administrative interface, the final status of the server is listed as “Running Maintenance Mode” instead of the expected status of “Stopped”.

Symptom

After you shut down the cluster node server in the administrative interface, the status “Shutting Down” is displayed for a while and then changes to “Running Maintenance Mode” instead of “Stopped”. You can still reach the cluster node server by using ping and SSH.

Cause

The administrative interface uses the power control adapter of the cluster node server to initiate a clean shutdown of the server. If the power control adapter is not working correctly, or if the operating system on the node hangs during shutdown, the server might stay in a running state with a part of the processes stopped. The administrative interface detects this situation as a state similar to “Running Maintenance Mode”.

 

Resolving the problem

Complete the following steps to resolve the problem:

  1. Force a shutdown of the cluster node server. This method works if the operating system is preventing the server from shutting down correctly. Complete the following steps:
    1. Log on to the management console server with the iaadmin ID and password.
    2. Run the following command, where ianodeX is the name of the cluster node server:
      ia_powercontrol -d ianodeX -N
  2. To check if the cluster node server is shut down, run the following command as iaadmin on the management console server, where ianodeX is the name of the server:
    ia_powercontrol -s ianodeX
    The server might take a few minutes to shut down. The command returns the following message after a successful shutdown:
    Node attached to power control hardware at 'ianodeX' is not powered on.
  3. If the ia_powercontrol command returns error messages, the power control adapter might not be working correctly. Complete the following steps to reset the power control adapter:
    1. Log on to the power control adapter, by running the following command where ianodeXis the name of the cluster node server: telnet pwrctl-ianodeX
    2. At the login: prompt, enter the following ID in upper-case characters: USERID
    3. At the Password: prompt, enter the following password in upper-case characters, using a zero instead of an “O” character: PASSW0RD
    4. At the system> prompt, run the following command: resetsp
    5. Log off from the power control adapter, by running the following command: exit
    6. Wait for 10 minutes so that the power control adapter can finish booting.
    7. Run the ia_powercontrol command again to force a shutdown.
  4. If you cannot shut down the cluster node server by using the power control adapater, log onto the server as root and run the following command: shutdown -h now
    Note: If the cluster node server is running in ‘Enhanced Tamper Protection’ mode, you must request and install an Emergency Support Access (ESA) patch to set up root access to the server.
  5. If you cannot shut down the cluster node server by using any of the previous steps, press the server power button for several seconds to stop the server.

https://www-304.ibm.com/support/docview.wss?mynp=OCSSS9C9&mync=E&uid=swg21499443&myns=s028

 

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