Troubleshooting › Trace I/O Events Using BESGTF

Trace I/O Events Using BESGTF

Use the BESGTF procedure to trace I/O events. Send the output file from this job to Technical Support for problem analysis when requested.

To trace I/O events using BESGTF

Modify member BESGTFPM in the CTAPJCL library to reflect the tape device range you are tracing.

The tracing parameters have the following format:

TRACE=SLIP,IOP,SSCHP,CCWP,HSCH,CSCH,MSCH,USRP             
IO=SSCH=(aaaa-bbbb,cccc-dddd),CCW=(DATA=80,CCWN=280,IOSB) 
USR=(FF,100,101,102,103,104,105,106)                      

Change the following variables in the tracing parameters as needed:

aaaa-bbbb

Specifies the range of devices to trace.

cccc-dddd

Specifies a second range of devices to trace. If only one range is necessary, you can omit the cccc-dddd range.