Statement summary

Table 1. BADTRACK summary
Variable	Value
Required/Optional Statement	Optional
Statement Default	None. If the initialization stream contains neither BADTRACK nor FORMAT statements and defective tracks existed on a spool volume before the most recent warm or cold start, I/O errors will occur when JES3 attempts to use the track group containing those tracks.
Placement in Initialization Stream	This statement must appear before the ENDJSAM statement.
Coding Considerations	Specify only one track on a statement. The maximum number of BADTRACK statements that you can specify is 32,767. You cannot use a BADTRACK statement to identify defective tracks in the single track table (STT). Do not substitute a FORMAT statement for a BADTRACK statement, although it also causes JES3 to identify defective tracks. Dependent on the TRACK and FORMAT statements.
Security Usage	None
Performance Considerations	None
Initialization Stream Overrides	None
Restart or Command Modification	Cold start or warm start for all parameters. You can use the `*MODIFY,Q,DD=ddname,CYL=cyl,TRK=trk` command to add badtrack records.