CA Dynam for VSE User Guide

Processing Predefined Multifile Volume Data Sets
Redefining Retention Characteristics
Retention attributes defined for the first file are automatically defined for all
subsequent files. Use the DYNCAT ALTER command to assign different
retention characteristics to any but the first file.
Keep in mind that predefined multifile data sets are listed alphabetically on
CA Dynam/T reports. Name these data sets so that they will appear together
on the reports.
Examples:
Defining a multifile-volume
This job stream catalogs four files for a multifile-volume, each with 3-cycle
retention. The files will always be written in the specified sequence: FILE 1 is
the first file on the tape and FILE 4 is the last.
// JOB DEFINE MULTI-FILE SET TO CATALOG
// EXEC DYNCAT
DEFINE 'FILE 1' NGEN=003
DEFINE 'FILE 2' PREVFILE='FILE 1'
DEFINE 'FILE 3' PREVFILE='FILE 2'
DEFINE 'FILE 4' PREVFILE='FILE 3'
/*
/&
You can add a file to the end of the tape.
Example:
// JOB DEFINE ADDITIONAL FILE
// EXEC DYNCAT
DEFINE 'FILE 5' PREVFILE='FILE 4'
/*
/&
Note:
• You cannot directly catalog a file between two existing files on a multifilevolume
data set. Delete the first data set, which deletes all following data
sets. Then catalog all data sets correctly.
• CA Dynam/T takes the file sequence number from the Catalog. Do not
include it on the TLBL statement—it will be ignored.
• Creating versions of the same multifile data set simultaneously can lead to
errors and is unsupported.
Chapter 2: Maintaining Tape Files 2–63