
Uncontrolled Datasets Types of Datasets
7-34 User Reference
Uncontrolled Datasets
Any dataset that is not controlled using the DSN Catalog or the Start Track 1 features is called
an uncontrolled dataset. With a few exceptions, uncontrolled datasets are not provided any
additional features than are provided using standard VSE.
For uncontrolled tape datasets, BIM-EPIC provides protection for all output tapes to ensure
that any tape volume that is still in an active status is not used. Additionally, if the
configuration option UNCTL is set to NO, uncontrolled tape datasets cannot use any tape in
the DSN Catalog even if it is in a scratch status. VSE ASSGN statements are not required for
uncontrolled tape datasets. If there is no assignment, the operator is prompted to specify an
available tape drive which can be used. Unlike controlled tape datasets, the assignment is not
released at close unless the configuration option UNCTAP is set to YES.
Uncontrolled disk datasets can be placed within the extents of a disk pool provided they are
created with adequate retention. ASSGN and EXTENT statements are normally required, but
if the configuration option UNCDSK is set to YES, the ASSGN statement is optional.
No special options are required for uncontrolled datasets.
Description
JCL Requirements
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