.-,-----------------------.     
          V                         |     
>>-DYNam(---(--volser--+-------+--)-+-)------------------------><
                       '-,unit-'          

DYNAM requests physical processing and specifies that the volume to be processed be dynamically allocated. The volume must be mounted and online. You cannot specify a nonspecific volume serial number using an asterisk (*). Using DYNAM instead of DD statements to allocate DASD volumes will not appreciably increase run time and permits easier coding of JCL and command input.

volser

Specifies the volume serial number of a DASD volume to be processed.

unit

Specifies the device type of a DASD volume to be processed. This parameter is optional.