Reporting the Percentage of Lost Connectivity

Once it initiates the rebuild processing, MVS™ notifies all connected users of the percentage of loss of connectivity through the event exit parameter list (EEPLREBUILDPCTLOSSCONN). This field is passed on all rebuilding events except Rebuild Complete and Rebuild Stop Complete. See Table 1 for more information about data passed to the event exit. Based on the percentage of lost connectivity, users can decide whether to allow the rebuild process to continue.

The system determines the percentage of lost connectivity as follows:

If there is an active SFM policy in the sysplex, the system uses the system weights defined in the policy using the calculations described above.
On systems with OW33615 installed or which are at OS/390® Release 9 or higher, if there is no active SFM policy in the sysplex, then if all sysplex members that are failure-independent report a loss of connectivity and sysplex members that are not failure-independent do not report a similar loss of connectivity, the system reports the percentage loss of connectivity as 100%. Otherwise, the percentage loss of connectivity is 0.