The system does not retain label type information for cataloged
data sets; if the label type is not coded in the LABEL parameter for
a cataloged data set, the system assumes SL.
For a data set on a direct access device, the system obtains the
label type from the DD statement; the label type is not obtained from
any other source referred to in the DD statement. Only two label types
are valid for direct access devices: SL and SUL.
- Indicates that a data set has IBM® standard
labels. If this subparameter is omitted, SL is the default.
only SL or SUL for data sets on direct access devices.
LABEL parameter is coded on a SYSCKEOV DD statement, code LABEL=(,SL).
- Indicates that a data set has both IBM standard
and user labels.
Code only SL or SUL for data sets on direct access
Do not code SUL for partitioned or indexed sequential
- Indicates that a tape data set has ISO/ANSI Version 1 or ISO/ANSI/FIPS
Version 3 labels.
you specify AL for a tape generation data set for output, the ending
.GnnnnVnn (where n=0 through 9) will not appear
as part of the file identifier (data set name field) of the HDR1 label.
Instead, the data is placed in the generation and version number
fields of the HDR1 label.
- Indicates that a tape data set has user labels and ISO/ANSI
Version 1 or ISO/ANSI/FIPS Version 3 labels.
- Indicates that a tape data set has nonstandard labels.
you code NSL, ensure that your installation has created and installed
non-standard label processing routines, described in z/OS DFSMS Installation Exits.
- Indicates that a tape data set has no labels.
two or more data sets from several NL or BLP tape volumes, concatenate
the DD statements and repeat the LABEL parameter on each DD statement.
you are processing ASCII data on unlabeled tapes, the data control
block must specify OPTCD=Q.
- Requests that the system bypass label processing for a tape
If the installation did not specify the BLP feature in
the reader cataloged procedure, BLP has the same effect as NL.
you code BLP and the tape volume has labels, a tapemark delimits the
data set. To let the system position a tape with labels to the proper
data set, code the data-set-sequence-number subparameter; the number
must reflect all labels and data sets that precede the desired data
Do not specify BLP when the DD DSNAME parameter requests
all members of a generation data group (GDG); the system obtains the
data-set-sequence-number from the catalog. Therefore, coding BLP
might result in incorrect tape positioning.
two or more data sets from several NL or BLP tape volumes, or when
retrieving a data set from several BLP tape volumes and those volumes
have labels, concatenate the DD statements and repeat the LABEL parameter
on each DD statement.
- Indicates that the data set has a leading tapemark.
You may use the LABEL parameter when allocating
a system-managed tape volume, but you cannot use the NSL or LTM subparameters.
If the ACS routine does not exclude these subparameters, the job will
fail with JCL errors.
System-managed tape volumes must be IBM standard
label or ANSI standard tapes.