CHECK(IBMXCF,XCF_CDS_SPOF) found an exception.
The couple data set configuration has one or more single points of failure. A failure at one of these points could result in loss of a couple data set, the system, or even the entire sysplex.
This message is preceded by one or more IOSPFxxxI messages, IXCH0244I, or IXCH0245I. These messages identify the single points of failure in the couple data set configuration. IXCH0907I also precedes this message to describe the couple data set configuration.
The system continues processing.
Report this problem to the system programmer.
For maximum availability, operate with both primary and alternate couple data sets for each couple data set type. The couple data sets should be allocated so as to avoid single points of failure. For example, the primary and alternate couple data sets should not reside on the same volume, or on volumes on the same physical control unit or in the same logical subsystem.
If IXCH0242E is preceded by IOSPFxxxI messages, refer to the documentation for those messages for an explanation of the single points of failure detected.
Take the necessary action to eliminate single points of failure. It might include varying additional device paths online, or adding or relocating couple data sets using the SETXCF COUPLE command.
Identify the single points of failure in the couple data set configuration from the IOSPFxxxI, IXCH0244I, and/or IXCH0245I messages that precede this message.
Parallel Sysplex® (XCF)
IXCHCCPL
See note 35.
3 is the default set by this check. See note 1.
For a discussion of considerations in allocating and managing couple data sets, see "Planning the Couple Data Sets" in z/OS MVS Setting Up a Sysplex.
For a discussion of formatting couple data sets, see "Format Utility for Couple Data Sets" in z/OS MVS Setting Up a Sysplex.
For the syntax of the SETXCF COUPLE command, see "SETXCF Couple Command" in z/OS MVS System Commands.
For more information about the IOSPFxxxI messages that describe the individual single points of failure detected in the couple data set configuration, see "IOSPF Messages" in z/OS MVS System Messages, Vol 9 (IGF-IWM).