Memorex LOCK - VERSION 2-24 Especificaciones Pagina 26

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EDD Tape Information BIM-EPIC Dataset Definitions (EDDs)
1-12 User Reference
EDD Tape Information
The label field specifies whether an output tape dataset is to be created on a labeled or
unlabeled tape.
The tape density specifies which density to use when creating a tape dataset. When a density
is specified, BIM-EPIC only scans drives that support the specified density when it looks for a
valid scratch tape. For example, you can use this field to assign a dataset to cartridge tapes
only.
A default density for your site can be specified using the MODE configuration option.
Specifying a tape density in the EDD overrides the MODE default. Specifying a density in the
JCL overrides both the MODE default and the EDD tape density. If no density is specified in
any of these places, BIM-EPIC uses the last density that was assigned to the selected drive.
The prime dataset name links all datasets in a multi-dataset group. The link is accomplished
in the DSN Catalog records, and it allows BIM-EPIC to group the datasets automatically. The
prime dataset is the first dataset on the tape. The second and subsequent datasets on the tape
are called subdatasets.
Multi-dataset processing can be complex, and there are pre-processing tasks required before a
multi-dataset group can be created. Multi-dataset processing is described in detail in Chapter
7.
The tape pool ID field associates a dataset with a particular tape pool. Once a dataset is
assigned to a tape pool, it can only be written on scratch tapes from that pool. Datasets not
assigned to a tape pool can only be written on scratch tapes that are not assigned to any tape
pool.
The owner ID is a secondary pooling mechanism for tape datasets. An owner ID is a two-
character code that matches the first two characters of a tape’s volume serial number. Owner
ID is provided primarily for compatibility with older tape management systems. If an owner
ID is specified for a dataset, all new tape versions must be created on tape volumes which
begin with those two characters.
Specifying Revolving Tapes=YES for a dataset establishes an exclusive relationship between
the dataset and the tapes it uses. A revolving tape volume can only contain a version of a
specific dataset, and a revolving tape dataset can only be written on specific tape volumes. A
revolving tape volume cannot be used in an Automated Cartridge Library (ACL).
Standard Label
Tape Density
Prime Dataset
Name
Tape Pool ID
Owner ID
Revolving Tape
Datasets
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