The Recover cluster? option is useful if the cluster superuser password has been lost or forgotten.
Use the recover cluster option (shown in Figure 1) if the user has lost the cluster superuser password or if the user is unable to access the cluster. If it is permitted by the user's password security policy, use this selection to reset the cluster superuser password. Alternatively, use this selection to enter the node into service mode. This makes the node available through the service IP address.
Navigate to the Service Access? menu by pressing the select button after you access the Recover Cluster? menu.
Resetting the password
- Press and hold the up button.
- Press and release the select button.
- Release the up button.
If your password security policy permits password recovery, and if the node is currently a member of a cluster, the cluster superuser password is reset and a new password is displayed for 60 seconds. If your password security policy does not permit password recovery or the node is not a member of a cluster, completing these steps has no effect.
Entering service mode
Enter service mode only if directed to do so by the IBM® Support Center.
This function is capable of degrading the operation of a working cluster. Use it only to recover from a problem that is making the cluster inaccessible.
- Press and hold the down button.
- Press and release the select button.
- Release the down button.
The node restarts and service mode is enabled. SERVICE MODE is displayed on the screen. You can navigate the front panel to see the current service IP addresses, which can be used to access the node from a Web browser or the CLI. The SERVICE MODE menu continues to be displayed on the front panel until service mode is reset by a command sent to the service IP address, or until the node exits service mode by using the CLI or service Web interface. The node can also be taken out of service mode by turning it off and back on again.