DD VOLUME Parameter

A reel of TAPE or a disk pack is called as on volume. VOL or VOLUME parameter is used to specify the volume serial number of the device on which a given data set is to be written or on which a data set currently resides.

Syntax:-

Sub parameters used with VOLUME parameter:-

• SER=serial-num1,serial-num2 :- Identify by serial number of the volume(s) on which the dataset resides or will reside. It can have 1 through 6 alphanumeric or national characters. Maximum 255 volume serials can be coded
• REF :- Referencing VOL specification from previous steps
• PRIVATE :- As name suggests, it requests a volume in exclusive mode for the specified dataset. Only one job can use volume at a time. TAPES are private by default
• RETAIN :- Requests that volume should not be dismounted until end of job
• Volume SEQ Number :- Specification of sequencing in which volumes should be mounted

Example 1:-

In above example, DEPTJOB is submitted. PROG1 is executed, TDATA1 is accessed in a volume whose serial number is 2345

Example 2:-

In above example the data set called TDATA2 resides on 3 volumes whose serial number are VOL1, VOL2 and VOL3 respectively. The operating system will request that all volumes to be mounted at the same time