The ALLOC_OUTPUT_STATUS option is a dynamic allocation option that specifies the status of existing data sets being allocated for output.

status is equivalent to the first positional parameter of the JCL DD statement's DISP parameter.

Valid values for status are:

• new
  Create new data set.

• shr
  Allocate the data set non-exclusively.

• old
  Allocate the data set exclusively.

• mod
  Either create a new data set, for exclusive use, or allocate a sequential data set exclusively and add records to the end of it.

Default is old.

Refer to the IBM JCL Reference manual for complete details.