A system that is partitioned from the sysplex because of status update missing is really indicating a system hang or wait. A system in a sysplex indicates its health by updating a timestamp value on the SYSPLEX couple dataset every second. If the timestamp is not updated for the failure detection interval as defined in the COUPLExx parmlib member in use (85 seconds is the recommended value), the system will be partitioned from the sysplex. Use the following steps to guide your diagnosis: