CA Dynam for VSE User Guide

Processing Predefined Multifile Volume Data Sets
Maintaining Predefined Multifile Volume Data Sets
The following restrictions apply to DYNCAT maintenance of predefined
multifile-volume data sets:
• You cannot perform the RENAME command on any file of a multifile set.
• If you perform the DELETE command on one file, CA Dynam/T applies it to
all subsequent files of the multifile set, as well.
• If you perform the ALTER command on one file, it is performed only on the
named file—not on all files of a multifile set.
• If you use the ADD command for a multifile data set, the ADD commands
must be performed in proper order.
• For multifile data sets, you cannot specify TAPEOPT=AUTOSCR as a
parameter of the DEFINE or ALTER commands.
Example:
Volume 4685 is to be added as the current version of FILE 1, FILE 2, FILE 3,
FILE 4, and FILE 5.
// JOB ADD TO A MULTIFILE SET
// EXEC DYNCAT
ADD 'FILE 1' VOLSER=(4685)
ADD 'FILE 2' VOLSER=(4685)
ADD 'FILE 3' VOLSER=(4685)
ADD 'FILE 4' VOLSER=(4685)
ADD 'FILE 5' VOLSER=(4685)
/*
/&
Automatic Tape Positioning
AVR functions in its usual manner for the first file of a multifile data set.
However, CA Dynam/T automatically positions subsequent files only if AVR can
locate the volumes. The tape must be at load point. Otherwise, you must
assign the logical unit external to the AVR facility by doing the following:
• Indicate the HOLD option to use a logical unit from the previous file
• Respond cuu to the MOUNT message
CA Dynam/T fully supports multifile, multivolume data sets, as follows:
• Suppose one file has been created on a volume and another file is to be
created next. CA Dynam/T issues a MOUNT message for the required
volume if AVR cannot locate it. When you try to create a subsequent file,
CA Dynam/T issues an error message and cancels the job if all prior files
do not already exist on the tape.
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