CVAF captures information in ctrace format in the Device Manager address space (devman). The trace data can optionally be connected to a ctrace output writer using the component name SYSDMO. The devman buffer containing CVAF trace data is included in any system dumps that are taken by the CVAF recovery routines. In addition, the system operator can request that devman take a dump that includes the CVAF trace data. CVAF trace data provides diagnostic information that improves the first failure data capture of CVAF errors.
TRACE CT,ON,COMP=SYSDMO
*07 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND
R 7,OPTIONS=(CVAF1,DADSM1),END
TRACE CT,ON,COMP=SYSDMO
*02 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND.
R 2,OPTIONS=(CVAF1,DADSM1,DADSM2)
*03 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND.
R 3,JOBNAME=(JOBA,JOBB,JOBC)
*04 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND.
R 4,ASID=(1001,1002,1003),END
TRACE CT,ON,COMP=SYSDMO
*07 ITT006A SPECIFY OPERAND(S) FOR TRACE CT COMMAND
R 7,OPTIONS=(CVAF0,DADSM0),END
F DEVMAN,DUMP=DUMP1
CTRACE COMP(SYSDMO) FULL LOCAL
For additional information on the use of IPCS, see z/OS MVS Diagnosis: Tools and Service Aids.