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DD Statements for Tape and Disk Datasets DISP Parameter
Chapter 6. BIM-EPIC DD Statements 6-15
DISP Parameter
DISP identifies how a dataset is to be opened and what is to be done to the dataset when it is
closed. DISP subparameters define the usage, normal termination and abnormal termination
disposition of a dataset. If more than one subparameter is used, the subparameter list must be
enclosed in parentheses. When a subparameter inside the list is not specified (to use its
default), a comma must still be used for all but the last subparameter.
DISP=[
usage-status
][,
normal-end-status
][,
abnormal-end-status
]
usage-status is optional. If used it must be one of the following:
NEW specifies that this is a new dataset or a new version of a dataset.
OLD specifies that this is an existing dataset
SHR specifies that this is an existing dataset
MOD specifies that new data is to be added to an existing version. A new version will
be created if there is no existing version.
When you use MOD with a disk dataset, BIM-EPIC will reuse the extents used for the last
version. For disk datasets, you can only specify MOD for non-generation disk datasets.
When used with tape, MOD causes new data to be written at the end of the dataset, over the
existing EOF record. A new EOF will be created.
MOD does not extend an existing disk dataset as it does for tape, or as MVS does. If MOD is
specified for an existing disk dataset that is opened as output, the same extent is used but
records are written at the beginning of the dataset. Any data already in the dataset is
overwritten and lost.
If usage-status is not specified, NEW is assumed.
normal-end-status is optional. If used it must be one of the following:
CATLG
CONDCAT
DELETE
KEEP
PASS
If normal-end-status is not specified, PASS is assumed if usage-status is NEW or
MOD. KEEP is assumed if usage-status is OLD, SHR, or SHARE.
abnormal-end-status is optional. If used it must be one of the following:
CATLG
Description
Syntax
Variables
WARNING!
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